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HOMESERVICE MANUALSMERCURY2009MILAN PREMIER, 3.0 1, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 549 (AUTOMATIC TRANSMISSION - CVT)DIAGNOSIS AND TESTINGDIAGNOSTIC TROUBLE CODE (DTC) TABLESDIAGNOSTIC TROUBLE CODE (DTC) TABLE
2009 Mercury Milan Premier, 3.0 1, AWD

Diagnostic Trouble Code (DTC) Table

2009 Mercury Milan Premier, 3.0 1, AWDSECTION Diagnostic Trouble Code (DTC) Table
WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC TROUBLE CODE (DTC) TABLE

Five Digit DTC Component Description Condition Symptom Action
C1222 CAN Wheel Speed Mismatch ABS module has detected an error. - CARRY OUT ABS system diagnosis. Check for correct wheel radius. REFER to ANTI-LOCK CONTROL .
P0218 TFT Transmission Fluid Over Temperature Condition Indicated The TCM detected that the transmission fluid temperature exceeded 115°C (239°F).
  • Will turn on cooling fans at 115°C (239°F).
  • Will flash warning lamp at 125°C (257°F).
  • Will turn on warning lamps (no flashing), Limp Home Mode Strategy will be enabled; will elevate pressures, harsh engagements at 140°C (284°F).
 REFER to DIAGNOSIS BY SYMPTOM .
P0219 Engine Engine RPM or Vehicle Speed Limit Reached Engine speed and turbine speed is higher than the maximum allowed speed of the engine.
  • Engine RPM too high or too low.
  • Open clutch during operation (loss of power).
  • Will turn on driver warning lamp.
 REFER to INTRODUCTION - GASOLINE article.
P0562 TCM TCM Power Input Signal Low DTC will set if engine running and input voltage to the TCM is lower than 9 volts. DTC will set if the battery has been disconnected for an extended period of time.
  • Engagement concerns. Harsh/erratic.
  • No torque converter lock-up.
  • Lack/loss of power/acceleration.
  • Different ratio behavior (increased engine rpm).
  • Will turn on MIL and driver warning lamp.
 GO to PINPOINT TEST H .
P0563 TCM TCM Power Input Signal High DTC will set if engine running and input voltage to the TCM is higher than 17 volts.
  • Engagement concerns. Harsh/erratic.
  • No torque converter lock-up.
  • Lack/loss of power/acceleration.
  • Different ratio behavior (increased engine rpm).
  • Will turn on MIL and driver warning lamp.
 GO to PINPOINT TEST H .
P0604 TCM Transaxle Control Module (TCM) Random Access Memory (RAM) Error TCM detected a failed data check of RAM.
  • Engagement concerns. Harsh/erratic.
  • No torque converter lock-up.
  • Lack/loss of power/acceleration.
  • Different ratio behavior (increased engine rpm).
  • Will turn on MIL and driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P0605 TCM TCM Read Only Memory (ROM) Error TCM detected a failed data check of ROM.
  • Engagement concerns. Harsh/erratic.
  • No torque converter lock-up.
  • Lack/loss of power/acceleration.
  • Different ratio behavior (increased engine rpm).
  • Will turn on MIL and driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
REFLASH the TCM. If program is successful, ERASE the DTC codes. If reflash fails, INSTALL a new mechatronic unit.
P0613 TCM Electrically Erasable Programmable Read Only Memory (EEPROM) Error TCM detected a failed data check of EEPROM.
  • Slight shift engagements concerns.
  • Will turn on driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
REFLASH the TCM. If program is successful, ERASE the DTC codes. If reflash fails, INSTALL a new mechatronic unit.
P0615 Starter Relay Circuit (Start Interlock) Starter Relay Circuit Pin 10 Shorted to Power or Ground Starter circuit pin 10 shorted.
  • No engagement.
  • Will turn on driver warning lamp.
 DISCONNECT the TCM control module. Visually check the connector for bent or broken pins.
P0634 TCM TCM Internal Temperature Too High The TCM detected that the transmission fluid temperature exceeded 130°C (266°F). Will turn on driver warning lamp at 130°C (266°F). REFER to DIAGNOSIS BY SYMPTOM .
P0641 TCM TCM Module Sensor Voltage Failed Sensor reference voltage A circuit open.
  • May turn on MIL
  • Mechanical limp home mode
 CLEAR all DTCs. TEST the system for normal operation. If the DTC returns, INSTALL a new mechatronics unit. After installing the new mechatronic unit, it must be reflashed to the latest level calibration.
P0657 Actuator Supply Voltage Circuit A Actuator Supply Voltage Circuit A Open High side driver error detected during initialization of the TCM. Short to ground or open.
  • Engagement concerns. Harsh/erratic.
  • No torque converter lock-up.
  • Lack/loss of power/acceleration.
  • Different ratio behavior (increased engine rpm).
  • Will turn on MIL and driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P0658 Actuator Supply Voltage Circuit A Actuator Supply Voltage Circuit A Low High side error detected during initialization of the TCM.
  • Engagement concerns. Harsh/erratic.
  • No torque converter lock-up.
  • Lack/loss of power/acceleration.
  • Different ratio behavior (increased engine rpm).
  • Will turn on MIL and driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P0659 Actuator Supply Voltage Circuit A Actuator Supply Voltage Circuit A High High side driver error detected during initialization of the TCM. Short to power.
  • Lack/loss of power/acceleration.
  • Vehicle not drivable.
  • Will turn on driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P0701 Transmission Control System Transmission Control System TCM has detected other transaxle DTCs setting this DTC enables limp home mode.
  • Engagement concerns. Harsh/erratic.
  • No torque converter lock-up.
  • Lack/loss of power/acceleration.
  • Different ratio behavior (increased engine rpm).
  • Will turn on MIL and driver warning lamp.
 FIX other transaxle DTC first. CLEAR DTCs.
P0702 Transmission Control Electrical System Transmission Control Electrical System Error Error detected during initialization of the TCM.
  • Engagement concerns. Harsh/erratic.
  • No torque converter lock-up.
  • Lack/loss of power/acceleration.
  • Different ratio behavior (increased engine rpm).
  • Will turn on MIL and driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P0705 Transmission Range (TR) Sensor Transmission Range Sensor Circuit A Internal components damaged, circuit A failure.
  • Different ratio behavior (increased engine rpm).
  • Lack/loss of power/acceleration.
  • Will turn on driver warning lamp.
 GO to PINPOINT TEST C .
P0710 TFT Transmission Fluid Temperature (TFT) Sensor A Circuit TCM detected TFT sensor out of range -55°-175°C (-67°-347°F).
  • Will turn on driver warning lamp.
 GO to PINPOINT TEST B .
P0711 TFT Transmission Fluid Temperature (TFT) Sensor A Circuit TCM detected an erratic change in temperature. Temperature signal changing too fast.
  • Will turn on driver warning lamp.
 GO to PINPOINT TEST B .
P0714 TFT Transmission Fluid Temperature (TFT) Sensor A Circuit Intermittent TCM detected the TFT temperature different than the set scale.
  • Will turn on driver warning lamp.
 GO to PINPOINT TEST B .
P0715 TSS Turbine Shaft Speed Sensor Circuit A TCM detected a loss of TSS signal during operation. Insufficient input from the turbine shaft speed sensor.
  • Engagement concerns. Harsh/erratic.
  • Will turn on driver warning lamp.
 With no other DTCs present, GO to PINPOINT TEST G . If other DTCs are present, diagnose and fix the other DTCs first, in the following order: P0868, P0961, P0871, P0811.
P0716 TSS Turbine Shaft Speed Sensor Circuit A High TCM detected a faulty TSS sensor. TSS signal higher than mechanically possible during operation.
  • Engine driveability concerns (loss of engine power).
  • Engagement concerns.
  • Will turn on driver warning lamp.
 GO to PINPOINT TEST G .
P0720 OSS Output Shaft Speed Sensor Circuit TCM detected a faulty output shaft speed sensor.
  • Engage concerns.
  • Will turn on MIL and driver warning lamp.
 With no other DTCs present, GO to PINPOINT TEST F . If other DTCs are present, diagnose and fix the other DTCs first, in the following order: P0942, P0868, P0961, P0871, P0811.
P0721 OSS Output Shaft Speed Sensor Circuit TCM has detected an erratic OSS signal.
  • Engage concerns.
  • Will turn on driver warning lamp.
 GO to PINPOINT TEST F .
P0730 Gear Ratio Incorrect Gear Ratio TCM detected the variator ratio is out of spec or an incorrect ratio.
  • No torque converter lock-up.
  • Different ratio behavior (increased engine rpm).
  • Will turn on MIL and driver warning lamp.
 With no other DTCs present, GO to PINPOINT TEST A . If other DTCs are present, diagnose and fix the other DTCs first, in the following order: P0868 (if set w/o driving), P0961, P0871, P0811, P0720, P0715, P2765.
P0740 TCC Torque Converter Clutch Solenoid Circuit Open Torque converter clutch solenoid driver output open.
  • No torque converter lock-up.
  • Will turn on driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P0741 TCC Torque Converter Clutch (TCC) Solenoid Circuit Performance or Stuck Off The TCM picked up an excessive amount of TCC slippage during normal vehicle operation.
  • Torque converter lock/unlock.
  • Engine RPM may be higher than expected.
  • Lack/loss of power/acceleration.
  • Will turn on driver warning lamp.
 GO to PINPOINT TEST D .
P0742 TCC Torque Converter Clutch Solenoid Circuit Stuck On TCC clutch driver output shorted to ground.
  • Engagement concerns. Harsh/erratic.
  • No torque converter lock-up.
  • Lack/loss of power/acceleration.
  • Different ratio behavior (increased engine rpm).
  • Will turn on MIL and driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P0743 TCC Torque Converter Clutch Solenoid Circuit Electrical TCC clutch driver output shorted to power.
  • No torque converter lock-up
  • Lack/loss of power/acceleration.
  • Different ratio behavior (increased engine rpm).
  • Will turn on driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P0810 Clutch Position Control Clutch Position Control Error TCM detect a sticking clutch due to a clutch opening error.
  • Engine driveability concerns (reduced engine performance).
  • Will turn on driver warning lamp.
 GO to PINPOINT TEST E .
P0811 Forward or Reverse Clutch Excessive Clutch Slippage Excessive forward and reverse clutch slipping.
  • Engine driveability concerns (reduced engine performance).
  • Will turn on driver warning lamp.
 With no other DTCs present, GO to PINPOINT TEST E . If other DTCs are present, diagnose and fix the other DTCs first, in the following order: P0868, P0961, P0871.
P0840 Main Pressure Sensor Transmission Main Fluid Pressure Sensor A Circuit TCM detected the main pressure sensor value is out of range 0-7,300 kPa (0-1,059 psi).
  • Will turn on driver warning lamp.
 GO to PINPOINT TEST A .
P0845 Secondary Pulley Pressure Sensor Secondary Pulley Fluid Pressure Sensor B Circuit TCM detected secondary pulley pressure sensor value is out of range 0-7,300 kPa (0-1,059 psi).
  • Will turn on driver warning lamp.
 GO to PINPOINT TEST A .
P0868 Transmission Fluid Pressure Transmission Fluid Pressure Low DTC will be set if an insufficient fluid supply is detected at the pressure sensor(s). This could be caused by defective pressure sensor(s) or a hydraulic system leakage. It is also possible to have no pressure due to very cold fluid -20°C (-4°F).
  • No torque converter lock-up.
  • Delayed engagements are possible (no pressure because of very cold fluid).
  • Lack of power and driveability concerns.
 If this DTC resets without driving the vehicle and there are no other DTCs, GO to PINPOINT TEST A . If vehicle has to be driven to duplicate the DTC and other DTCs are present, diagnose and fix the other DTCs first, in the following order: P0942, P0961, P0871, P0811, P0720, P0715, P2765.
P0871 Transmission Secondary Fluid Pressure Sensor Transmission Secondary Fluid Pressure Sensor Circuit C DTC will be set if secondary pulley pressure is lower or higher than expected. This indicates a defect pressure sensor or a leakage of the hydraulic system.
  • Marginal loss of acceleration.
  • Will turn on driver warning lamp.
 If this DTC sets without P0961, install a new transaxle due to internal metal contamination. With no other DTCs present, GO to PINPOINT TEST A . If other DTCs are present, diagnose and fix the other DTCs first, in the following order: P0942, P0868, P0961.
P0900 Clutch Actuator Clutch Actuator Solenoid Open Circuit Forward, reverse clutch driver output open.
  • Different ratio behavior (increased engine rpm).
  • Lack/loss of power/acceleration
  • Harsh engagement concerns.
  • Will turn on warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P0902 Clutch Actuator Clutch Actuator Circuit Low Forward, reverse clutch driver output short to ground.
  • Engagement concerns. Harsh/erratic.
  • No torque converter lock-up.
  • Lack/loss of power/acceleration.
  • Different ratio behavior (increased engine rpm).
  • Will turn on MIL and driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P0903 Clutch Actuator Clutch Actuator Circuit High Forward, reverse clutch driver output short to power.
  • Different ratio behavior (increased engine rpm).
  • Lack/loss of power/acceleration.
  • Harsh engagement concerns.
  • Will turn on warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P0942 Hydraulic Pressure Unit Stuck Limp Home Mode Value Fault detected in hydraulic valve body.
  • Harsh or erratic shift engagements.
  • No torque converter clutch apply.
  • No REVERSE.
  • No DRIVE.
  • Will turn on MIL and driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit. If transmission fluid is contaminated, INSTALL a new transaxle.
P0960 PCA Pressure Control Solenoid A Control Circuit Open Main pressure driver output open.
  • Engagement concerns. Harsh/erratic.
  • No torque converter lock-up.
  • Lack/loss of power/acceleration.
  • Different ratio behavior (increased engine rpm).
  • Will turn on MIL and driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If this DTC code is set in the DEM module, REFER to PINPOINT TEST A: NO COMMUNICATION WITH THE DEM . If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P0961 PCA Pressure Control Solenoid A Out Of Range DTC will be set if main pressure is lower or higher than expected. This indicates a defective pressure sensor or a leakage of the hydraulic system.
  • Marginal loss of power/acceleration
  • Will turn on driver warning lamp.
 With no other DTCs present, GO to PINPOINT TEST A . If other DTCs are present, diagnose and fix the other DTCs first, in the following order: P0942, P0868. If this DTC code is set in the DEM module, REFER to PINPOINT TEST A: NO COMMUNICATION WITH THE DEM .
P0962 PCA Pressure Control Solenoid A Control Circuit Low Main pressure driver output shorted to ground.
  • Engagement concerns. Harsh/erratic.
  • No torque converter lock-up.
  • Lack/loss of power/acceleration.
  • Different ratio behavior (increased engine rpm).
  • Will turn on driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P0963 PCA Pressure Control Solenoid A Control Circuit High Main pressure driver output shorted to power.
  • Will turn on driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P0964 PCB Pressure Control Solenoid B Control Circuit Open Primary pulley driver output open.
  • Different ratio behavior (increased engine rpm).
  • Lack/loss of power/acceleration.
  • Will turn on MIL and driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P0966 PCB Pressure Control Solenoid B Control Circuit Low Primary pulley driver output shorted to ground.
  • Engagement concerns. Harsh/erratic.
  • No torque converter lock-up.
  • Lack/loss of power/acceleration.
  • Different ratio behavior (increased engine rpm).
  • Will turn on MIL and driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P0967 PCB Pressure Control Solenoid B Control Circuit High Primary pulley driver output shorted to power.
  • Different ratio behavior (increased engine rpm).
  • Lack/loss of power/acceleration.
  • Will turn on MIL and driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P0968 PCC Pressure Control Solenoid C Control Circuit Open Second pulley driver output open.
  • Different ratio behavior (increased engine rpm).
  • Lack/loss of power/acceleration.
  • Will turn on MIL and driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P0970 PCC Pressure Control Solenoid C Control Circuit Low Second pulley driver output shorted to ground.
  • Engagement concerns. Harsh/erratic.
  • No torque converter lock-up.
  • Lack/loss of power/acceleration.
  • Different ratio behavior (increased engine rpm).
  • Will turn on MIL and driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P0971 PCC Pressure Control Solenoid C Control Circuit High Second pulley driver output shorted to power.
  • Different ratio behavior (increased engine rpm).
  • Lack/loss of power/acceleration.
  • Will turn on MIL and driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P1710 TCM TCM solenoid/internal ground circuit Mechatronic module has detected an electrical concern with the driver and or solenoid circuits in the module. Limp Home Mode Strategy enabled.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
P1935 BPP/CAN ABS Brake Switch/sensor signal No signal via CAN from the ABS Module - For diagnostic information, REFER to INTRODUCTION - GASOLINE article and REFER to ANTI-LOCK CONTROL .
P2544 PCM Torque Management Request Input Signal A Data received from the PCM or engine components are not correct for the vehicle operating conditions. Incorrect engine torque calculation may result. Transmission may enable limp-home strategies or increase pressures. Engine components and PCM may or may not set additional DTCs. P2544, fuel monitor error, ECT sensor failure and MAF sensor failures may be present. MIL may illuminate. REFER to INTRODUCTION - GASOLINE article .
P2637 CAN/PCM Torque management feedback signal A Calculated torque valued received from ECM is invalid. Engine concerns may be present. CARRY OUT engine diagnostics.
P2765 Primary Pulley Speed Sensor A No or Incorrect Signal From Primary Pulley Speed Sensor TCM detected a faulty pulley A speed sensor at the TCM.
  • Engage concerns.
  • Will turn on driver warning lamp.
 With no other DTCs present, GO to PINPOINT TEST I . If other DTCs are present, diagnose and fix the other DTCs first, in the following order: P0942, P0868, P0961, P0871, P0811.
P2766 Primary Pulley Speed Sensor A No or Incorrect Signal From Primary Pulley Speed Sensor TCM detected a faulty pulley A speed. Signal higher than mechanically possible during operation.
  • Engage concerns.
  • Will turn on driver warning lamp.
 With no other DTCs present, GO to PINPOINT TEST I . If other DTCs are present, diagnose and fix the other DTCs first, in the following order: P0942, P0868, P0961, P0871, P0811.
P186D TCM Set by all wheel drive (AWD) failure concern DEM sends signal to the TCM via the CAN network. No AWD. Will turn on driver warning lamp. See DTC code P0961 REFER to PINPOINT TEST A: NO COMMUNICATION WITH THE DEM .
U0001 CAN/TCM High speed CAN communication bus Transmission messages to other modules are faulty. - Check CAN harness between TCM and other modules. Repair all other DTCs present first. For additional diagnostic information, REFER to INTRODUCTION - GASOLINE article and REFER to COMMUNICATIONS NETWORK .
U0073 TCM Transmission Control Module Communication Error Loss of communication with the TCM.
  • Engine driveability concerns.
  • Will turn on MIL and driver warning lamp.
 REFER to INTRODUCTION - GASOLINE article.
U0100 CAN Lost communication with ECM/PCM A Communications with ECM/PCM A have been lost. - Check CAN harness between TCM and other modules. For additional diagnostic information, REFER to INTRODUCTION - GASOLINE article and REFER to COMMUNICATIONS NETWORK .
U0101 TCM/PCM Transmission Control Module Communication Error PCM lost communication with the TCM.
  • Engine driveability concerns.
  • Will turn on MIL and driver warning lamp.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
INSTALL a new mechatronic unit.
U0121 CAN/ABS Lost communication with ABS Module ECM/PCM/TCM has detected an error in communications with the ABS module.
  • Increased pulley pressure. ABS sensor may have failed. Brake signal may be applied.
 CARRY OUT ABS system diagnosis. REFER to ANTI-LOCK CONTROL .
U0301 Software Incompatible Software Incompatible With the Powertrain Control Module (PCM) Software is different than the vehicle configuration. Engine driveability concerns.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available. REFLASH the TCM. If program is successful, ERASE the DTC codes. If reflash fails, INSTALL a new mechatronic unit.
REFER to INTRODUCTION - GASOLINE article.
U0415 CAN/ABS Invalid data received from ABS module. ECM/PCM/TCM has detected an error in communications with the ABS module. Increased pulley pressure. ABS sensor may have failed. Brake signal may be applied. CARRY OUT ABS system diagnosis. REFER to ANTI-LOCK CONTROL .
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