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HOMESERVICE MANUALSFORD1997RANGER BASE, 2D PICKUP, 2.3 A, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - 2.3LDIAGNOSTIC TROUBLE CODE (DTC) REFERENCE CHARTS
1997 Ford Ranger Base, 2D Pickup, 2.3 A, Automatic

Diagnostic Trouble Code (DTC) Reference Charts

1997 Ford Ranger Base, 2D Pickup, 2.3 A, AutomaticSECTION Diagnostic Trouble Code (DTC) Reference Charts
DTC REFERENCE CHART

DTC Description Circuit Test/Step: KOEO Circuit Test/Step: KOER Circuit Test/Step: CONT.
P0102 Mass Air Flow Circuit Low Input - DC/6  DC/6 
P0103 Mass Air Flow Circuit High Input DC/20  DC/20  DC/20 
P0112 Intake Air Temperature Circuit Low Input DA/20  DA/20  DA/90 
P0113 Intake Air Temperature Circuit High Input DA/10  DA/10  DA/90 
P0117 Engine Coolant Temperature Circuit Low Input DA/20  DA/20  DA/90 
P0118 Engine Coolant Temperature Circuit High Input DA/10  DA/10  DA/90 
P0121 Throttle Position Circuit Performance Problem - DH/22  DH/22 
P0122 Throttle Position Circuit Low Input DH/11  DH/11  DH/11 
P0123 Throttle Position Circuit High Input DH/8  DH/8  DH/8 
P0125 Insufficient Coolant Temperature For Closed Loop Fuel Control - - DA/100 
P0131 HO2S Sensor Circuit Out Of Range Low Voltage (HO2S-11) - - H/27 
P0133 HO2S Sensor Circuit Slow Response (HO2S-11) - - H/20 
P0135 HO2S Sensor Circuit Malfunction (HO2S-11) H/30  H/30  H/30 
P0136 HO2S Sensor Circuit Malfunction (HO2S-12) - - H/80 
P0141 HO2S Sensor Circuit Malfunction (HO2S-12) H/30  H/30  H/30 
P0151 HO2S Sensor Circuit Out Of Range Low Voltage (HO2S-21) - - H/27 
P0153 HO2S Sensor Circuit Slow Response (HO2S-21) - - H/20 
P0155 HO2S Sensor Circuit Malfunction (HO2S-11) H/30  H/30  H/30 
P0156 HO2S Sensor Circuit Malfunction (HO2S-22) - - H/80 
P0161 HO2S Sensor Circuit Malfunction (HO2S-22) H/30  H/30  H/30 
P0171 System To Lean (Bank 1) - - H/41 
P0172 System To Rich (Bank 1) - - H/41 
P0174 System To Lean (Bank 2) - - H/41 
P0175 System To Rich (Bank 2) - - H/41 
P0222 Throttle Position Sensor B Low Input HT/1  HT/1  HT/1 
P0223 Throttle Position Sensor B High Input HT/10  HT/10  HT/10 
P0230 Fuel Pump Primary Circuit Malfunction KA/1  KA/1  KA/40 
P0231 Fuel Pump Secondary Circuit Low Input KA/20  KA/20  KA/35 
P0232 Fuel Pump Secondary Circuit High Input KA/10  KA/10  KA/30 
P0300 Random Misfire - HD/1  HD/1 
P0301 Misfire Detection Monitor - Cylinder No. 1 - HD/1  HD/1 
P0302 Misfire Detection Monitor - Cylinder No. 2 - HD/1  HD/1 
P0303 Misfire Detection Monitor - Cylinder No. 3 - HD/1  HD/1 
P0304 Misfire Detection Monitor - Cylinder No. 4 - HD/1  HD/1 
P0320 Ignition Engine Speed Input Circuit Malfunction - - NC/1 
P0325 Knock Sensor 1 Circuit Malfunction (Bank 1) - DG/1  DG/1 
P0326 Knock Sensor 1 Circuit Range/Performance (Bank 1) - DG/1  DG/1 
P0330 Knock Sensor 2 Circuit Malfunction (Bank 2) - DG/1  DG/1 
P0331 Knock Sensor 2 Circuit Range/Performance (Bank 2) - DG/1  DG/1 
P0340 Camshaft Position Sensor Circuit Malfunction - DR/1  DR/1 
P0350 Ignition Coil Primary/Secondary Circuit Malfunction - - JE/20 
P0351 Ignition Coil A Primary/Secondary Circuit Malfunction - - JE/20 
P0352 Ignition Coil B Primary/Secondary Circuit Malfunction - - JE/20 
P0401 EGR Flow Insufficient Detected - - HE/70 
P0402 EGR Flow Excessive Detected - HE/20  HE/20 
P0411 Secondary Air Injection System - Electric Air Pump HM/7  HM/7  HM/7 
P0412 Secondary Air Injection System Circuit Malfunction HM/1  HM/1  HM/1 
P0413 Secondary Air Injection System HM/75  HM/75  HM/75 
P0414 Secondary Air Injection System HM/75  HM/75  HM/75 
P0416 Secondary Air Injection System HM/75  HM/75  HM/75 
P0417 Secondary Air Injection System HM/75  HM/75  HM/75 
P0420 Catalyst System Efficiency Below Threshold (Bank 1) - - HF/1 
P0430 Catalyst System Efficiency Below Threshold (Bank 2) - - HF/1 
P0442 Evaporative Emission Control System Leak Detected (Small Leak) - - HX/1 
P0443 Evaporative Emission Control System Canister Purge Valve Circuit Malfunction HW/1  HW/1  HW/40 
P0446 Evaporative Emission Control System Excessive Fuel Tank Vacuum - - HX/13 
P0452 FTP Sensor Circuit Low Voltage Detected HX/22  HX/22  HX/22 
P0453 FTP Sensor Circuit High Voltage Detected HX/28  HX/28  HX/28 
P0455 Evaporative Emission Control System Leak Detected (No Purge Flow Or Large Leak) - - HX/39 
P0500 Vehicle Speed Sensor Malfunction - - DP/1 
P0501 Vehicle Speed Sensor Range/Performance - - DP/1 
P0503 Vehicle Speed Sensor Intermittent - - DP/20 
P0505 Vehicle Speed Sensor Intermittent - KE/2  -
P0603 Powertrain Control Module KAM Test Error QB/1  - -
P0605 Powertrain Control Module Read Only Memory Error Replace PCM Replace PCM Replace PCM
P0703 Brake Switch Circuit Input Malfunction - - FD/3 
P0705 Digital Transmission Range Sensor Malfunction (1) - -
P0707 Digital Transmission Range Sensor Circuit Low Voltage - - (1)
P0708 Digital Transmission Range Sensor Circuit High Voltage - - (1)
P0712 Transmission Fluid Temperature Sensor Circuit Grounded (1) (1) (1)
P0713 Transmission Fluid Temperature Sensor Circuit Open (1) (1) (1)
P0715 Turbine Shaft Speed Sensor Circuit Malfunction - (1) (1)
P0731 1st Gear Failure - - (1)
P0732 2nd Gear Failure - - (1)
P0733 3rd Gear Failure - - (1)
P0734 4th Gear Failure - - (1)
P0743 Torque Converter Clutch Solenoid Circuit Failure (1) (1) (1)
P0750 Shift Solenoid 1 Circuit Failure (1) (1) (1)
P0751 Shift Solenoid 1 Functional Failure - - (1)
P0755 Shift Solenoid 2 Circuit Failure (1) (1) (1)
P0756 Shift Solenoid 2 Functional Failure - - (1)
P0760 Shift Solenoid 3 Circuit Failure (1) (1) (1)
P0761 Shift Solenoid 3 Functional Failure - - (1)
P1000 Monitor Testing Not Complete (2) (2) QC/1 
P1001 KOER Not Able To Complete, KOER Aborted - QA/1  -
P1100 Mass Air Flow Sensor Intermittent - - DC/3 
P1101 Mass Air Flow Sensor Out Of Self-Test Range DC/2  DC/1  -
P1112 Intake Air Temperature Sensor Intermittent - - DA/90 
P1116 Engine Coolant Temperature Sensor Out Of Self-Test Range DA/1  DA/1  -
P1117 Engine Coolant Temperature Sensor Intermittent - - DA/90 
P1120 Throttle Position Sensor Out Of Range Low (RATCH Too Low) DH/3  DH/3  DH/3 
P1121 Throttle Position Sensor Inconsistent With MAF Sensor - - DH/15 
P1124 Throttle Position Sensor Out Of Self-Test Range DH/1  DH/1  -
P1125 Throttle Position Sensor Intermittent - - DH/20 
P1127 Exhaust Not Warm Enough, Downstream Sensor Not Tested - H/100  -
P1128 Upstream Oxygen Sensors Swapped From Bank To Bank (HO2S-11-21) - H/110  -
P1129 Downstream Oxygen Sensors Swapped From Bank To Bank (HO2S-12-22) - H/110  -
P1130 Lack Of HO2S-11 Switch, Fuel Trim At Limit - - H/40 
P1131 Lack Of HO2S-11 Switch, Sensor Indicates Lean - H/40  H/40 
P1132 Lack Of HO2S-11 Switch, Sensor Indicates Rich - H/40  H/40 
P1137 Lack Of HO2S-12 Switch, Sensor Indicates Lean - H/80  -
P1138 Lack Of HO2S-12 Switch, Sensor Indicates Rich - H/80  -
P1150 Lack Of HO2S-21 Switch, Fuel Trim At Limit - - H/40 
P1151 Lack Of HO2S-21 Switch, Sensor Indicates Lean H/40  H/40  H/40 
P1152 Lack Of HO2S-21 Switch, Sensor Indicates Rich - H/40  H/40 
P1157 Lack Of HO2S-22 Switch, Sensor Indicates Lean - H/80  -
P1158 Lack Of HO2S-22 Switch, Sensor Indicates Rich - H/80  -
P1220 Series Throttle Control System Malfunction HT/20  HT/20  HT/20 
P1224 Throttle Position Sensor B Voltage Out Of Range HT/40  HT/40  HT/40 
P1260 Theft Detected - Vehicle Immobilized - - QD/1 
P1270 Engine RPM/Vehicle Speed Limiter - - ND/1 
P1285 Cylinder Head Over Temperature Sensed - - DL/30 
P1288 Cylinder Head Temperature Sensor Circuit Out Of Self-Test Range DL/1  DL/1  -
P1289 Cylinder Head Temperature Sensor Circuit High Input DL/10  DL/10  DL/90 
P1290 Cylinder Head Temperature Sensor Circuit Low Input DL/20  DL/20  DL/90 
P1299 Cylinder Head Over Temperature Protection Active - - DL/100 
P1309 Misfire Monitor Disabled - - HD/40 
P1390 Octane Adjust FG/1  - -
P1400 DPF EGR Sensor Circuit Low Voltage Detected HE/1  HE/1  HE/1 
P1401 DPF EGR Sensor Circuit High Voltage Detected HE/10  HE/10  HE/10 
P1405 DPF EGR Sensor Upstream Hose Off Or Plugged - - HE/50 
P1406 DPF EGR Sensor Downstream Hose Off Or Plugged - - HE/60 
P1408 EGR Flow Out Of Self-Test Range - HE/71  -
P1409 EGR Vacuum Regulator Solenoid Circuit Malfunction HE/110  HE/110  HE/120 
P1411 Secondary Air Injection System Downstream Flow HM/40  HM/40  HM/40 
P1413 Secondary Air Injection System Monitor Circuit Low HM/18  HM/18  HM/18 
P1414 Secondary Air Injection System Monitor Circuit High HM/25  HM/25  HM/25 
P1442 Evaporative Emission Control System Leak Detected (Small Leak) - - HX/1 
P1443 Very Small Or No Purge Flow Condition - - HW/7 
P1444 Purge Flow Sensor Circuit Low Input - - HW/27 
P1445 Purge Flow Sensor Circuit High Input - - HW/33 
P1450 Evaporative Emission Control System Excessive Fuel Tank Vacuum - - HX/56 
P1451 Evaporative Emission Control System Canister Vent Solenoid Circuit Malfunction HX/65  HX/65  HX/65 
P1452 Evaporative Emission Control System Unable To Bleed Up Fuel Tank Vacuum - - HX/56 
P1455 Evaporative Emission Control System Detected Large Leak Or No Purge Flow - - HX/40 
P1460 Wide Open Throttle A/C Cutout Primary Circuit Malfunction KM/1  KM/1  KM/30 
P1464 A/C Demand Out Of Self-Test Range KM/19  KM/19  -
P1500 Vehicle Speed Sensor Intermittent - - DP/25 
P1501 Vehicle Speed Sensor Out Of Self Test Range - DP/15  -
P1504 Idle Air Control Circuit Malfunction KE/2  KE/2  KE/2 
P1505 Idle Air Control System Reached Idle Air Trim Limit KE/25  KE/25  KE/25 
P1506 Idle Air Control Overspeed Error - KE/20  KE/20 
P1507 Idle Air Control Underspeed Error - KE/2  KE/2 
P1512 Intake Manifold Runner Control Malfunction (Stuck Closed) - - HU/15 
P1513 Intake Manifold Runner Control Malfunction (Stuck Closed) - - HU/15 
P1516 Intake Manifold Runner Control Input Error HU/15  - HU/15 
P1517 Intake Manifold Runner Control Input Error HU/15  - HU/15 
P1518 Intake Manifold Runner Control Malfunction (Stuck Open) HU/15  HU/15  HU/15 
P1519 Intake Manifold Runner Control Malfunction (Stuck Closed) HU/15  HU/15  HU/15 
P1520 Intake Manifold Runner Control Circuit Malfunction HU/15  HU/15  HU/15 
P1537 Intake Manifold Runner Control Malfunction (Stuck Open) HU/15  HU/15  HU/15 
P1538 Intake Manifold Runner Control Malfunction (Stuck Open) HU/15  HU/15  HU/15 
P1549 Intake Manifold Communication Control Circuit Malfunction HU/65  HU/65  HU/65 
P1605 Keep Alive Memory Test Failure QB/1  - -
P1650 Power Steering Pressure Switch Malfunction FF/1  FF/1  -
P1651 Power Steering Pressure Switch Signal Malfunction - FF/1  FF/1 
P1701 Reverse Engagement Error - - (1)
P1703 Brake Switch Out Of Self-Test Range FD/2  FD/1  -
P1704 Digital Transmission Range Sensor Failure (1) - -
P1705 Digital Transmission Range Not In PARK Or NEUTRAL (1) (1) -
P1711 Transmission Fluid Temperature Out Of Self-Test Range (1) (1) -
P1729 4x4L Switch Malfunction - - TG/1 
P1744 Excessive Torque Converter Clutch Slippage - - (1)
P1746 Shorted Powertrain Control Module Output Driver (1) - (1)
P1747 Electronic Pressure Control Solenoid Circuit Failure (1) - (1)
P1754 Coast Clutch Solenoid Circuit Failure (1) - (1)
P1780 Transmission Control Switch Out Of Self-Test Range - TB/1  -
P1781 4x4L Switch Out Of Self-Test Range TG/1  - -
P1783 Transmission Fluid Temperature Exceeded - - (1)
U1020 Module Communication Network Failure - - (3)
U1039 Module Communication Network Failure - - (3)
U1051 Module Communication Network Failure - - (3)
U1135 Module Communication Network Failure - - (3)
U1451 Module Communication Network Failure - - (3)
(1) Transmission/transaxle fault is indicated. See appropriate AUTOMATIC TRANSMISSION article.
(2) DTC P1000 indicates that OBD-II drive cycle has not been completed. Disregard this DTC in KOEO and KOER self-test and continue as directed.
(3) Module communication network failure is indicated. See appropriate MODULE COMMUNICATION NETWORK article in ACCESSORIES & EQUIPMENT.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.