Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSUBARU2016LEGACY 2.5IREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLVEHICLE DYNAMICS CONTROL (VDC) SYSTEM (DIAGNOSTICS)LIST OF DIAGNOSTIC TROUBLE CODE (DTC)LIST
2016 Subaru Legacy 2.5i
List of Diagnostic Trouble Code (DTC): List
2016 Subaru Legacy 2.5iSECTION List
| DTC | Item | Content of diagnosis | Reference |
|---|---|---|---|
| C1211 | FRONT RIGHT ABS SENSOR CIRCUIT | Open/high input of front ABS wheel speed sensor RH | < Ref. to DTC C1211 FRONT RIGHT ABS SENSOR CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1212 | FRONT RIGHT ABS SENSOR SIGNAL | Front ABS wheel speed sensor RH signal malfunction | < Ref. to DTC C1212 FRONT RIGHT ABS SENSOR SIGNAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1221 | FRONT LEFT ABS SENSOR CIRCUIT | Open/high input of front ABS wheel speed sensor LH | < Ref. to DTC C1221 FRONT LEFT ABS SENSOR CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1222 | FRONT LEFT ABS SENSOR SIGNAL | Front ABS wheel speed sensor LH signal malfunction | < Ref. to DTC C1222 FRONT LEFT ABS SENSOR SIGNAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1231 | REAR RIGHT ABS SENSOR CIRCUIT | Open/high input of rear ABS wheel speed sensor RH | < Ref. to DTC C1231 REAR RIGHT ABS SENSOR CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1232 | REAR RIGHT ABS SENSOR SIGNAL | Rear ABS wheel speed sensor RH signal malfunction | < Ref. to DTC C1232 REAR RIGHT ABS SENSOR SIGNAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1241 | REAR LEFT ABS SENSOR CIRCUIT | Open/high input of rear ABS wheel speed sensor LH | < Ref. to DTC C1241 REAR LEFT ABS SENSOR CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1242 | REAR LEFT ABS SENSOR SIGNAL | Rear ABS wheel speed sensor LH signal malfunction | < Ref. to DTC C1242 REAR LEFT ABS SENSOR SIGNAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1311 | FR HOLD VALVE | Front inlet solenoid valve RH malfunction in VDCCM & H/U | < Ref. to DTC C1311 FR HOLD VALVE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1312 | FR PRESSURE REDUCING VALVE | Front outlet solenoid valve RH malfunction in VDCCM & H/U | < Ref. to DTC C1312 FR PRESSURE REDUCING VALVE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1321 | FL HOLD VALVE | Front inlet solenoid valve LH malfunction in VDCCM & H/U | < Ref. to DTC C1321 FL HOLD VALVE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1322 | FL PRESSURE REDUCING VALVE | Front outlet solenoid valve LH malfunction in VDCCM & H/U | < Ref. to DTC C1322 FL PRESSURE REDUCING VALVE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1331 | RR HOLD VALVE | Rear inlet solenoid valve RH malfunction in VDCCM & H/U | < Ref. to DTC C1331 RR HOLD VALVE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1332 | RR PRESSURE REDUCING VALVE | Rear outlet solenoid valve RH malfunction in VDCCM & H/U | < Ref. to DTC C1332 RR PRESSURE REDUCING VALVE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1341 | RL HOLD VALVE | Rear inlet solenoid valve LH malfunction in VDCCM & H/U | < Ref. to DTC C1341 RL HOLD VALVE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1342 | RL PRESSURE REDUCING VALVE | Rear outlet solenoid valve LH malfunction in VDCCM & H/U | < Ref. to DTC C1342 RL PRESSURE REDUCING VALVE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1351 | NORMAL OPENING VALVE 1 | Secondary cut valve malfunction in VDCCM & H/U | < Ref. to DTC C1351 NORMAL OPENING VALVE 1 , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1352 | NORMAL OPENING VALVE 2 | Primary cut valve malfunction in VDCCM & H/U | < Ref. to DTC C1352 NORMAL OPENING VALVE 2 , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1361 | NORMAL CLOSING VALVE 1 | Secondary suction valve malfunction in VDCCM & H/U | < Ref. to DTC C1361 NORMAL CLOSING VALVE 1 , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1362 | NORMAL CLOSING VALVE 2 | Primary suction valve malfunction in VDCCM & H/U | < Ref. to DTC C1362 NORMAL CLOSING VALVE 2 , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1411 | ELECTRICAL CONTROL MODULE | VDC control module malfunction | < Ref. to DTC C1411 ELECTRICAL CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1412 | SELECTED PARAMETER | VDC control module parameter failure | < Ref. to DTC C1412 SELECTED PARAMETER , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1413 | POWER SUPPLY VOLTAGE | Power voltage malfunction | < Ref. to DTC C1413 POWER SUPPLY VOLTAGE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1422 | VDC INTERRUPTION FOR ENGINE CONVENIENCE | VDC interrupted due to some reasons of the engine | < Ref. to DTC C1422 VDC INTERRUPTION FOR ENGINE CONVENIENCE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1423 | DIFFERENT ECU SPECIFICATIONS | Different VDC control module specification | < Ref. to DTC C1423 DIFFERENT ECU SPECIFICATIONS , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1424 | ECM | Engine control module is faulty | < Ref. to DTC C1424 ECM , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1431 | AT | Transmission control module is faulty | < Ref. to DTC C1431 AT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1511 | VALVE RELAY | Defective valve relay | < Ref. to DTC C1511 VALVE RELAY , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1521 | MOTOR RELAY | Motor relay malfunction | < Ref. to DTC C1521 MOTOR RELAY , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1531 | BLS OFF STUCK | Stop light switch malfunction | < Ref. to DTC C1531 BLS OFF STUCK , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1532 | BLS ON STUCK | Stop light switch malfunction | < Ref. to DTC C1532 BLS ON STUCK , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1571 | BRAKE LAMP RELAY OFF STUCK | Brake light relay malfunction | < Ref. to DTC C1571 BRAKE LAMP RELAY OFF STUCK , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1711 | STEERING ANGLE SENSOR | Steering angle sensor malfunction | < Ref. to DTC C1711 STEERING ANGLE SENSOR , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1721 | YAW RATE SENSOR | Defective yaw rate sensor | < Ref. to DTC C1721 YAW RATE SENSOR , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1732 | LATERAL G SENSOR | Defective lateral G sensor | < Ref. to DTC C1732 LATERAL G SENSOR , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1733 | LONGITUDINAL G SENSOR | Defective longitudinal G sensor | < Ref. to DTC C1733 LONGITUDINAL G SENSOR , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1741 | PRESSURE SENSOR | Defective pressure sensor | < Ref. to DTC C1741 PRESSURE SENSOR , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1742 | WHEEL CYLINDER PRESSURE SENSOR | Defective pressure sensor | < Ref. to DTC C1742 WHEEL CYLINDER PRESSURE SENSOR , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1811 | SYSTEM | System malfunction | < Ref. to DTC C1811 SYSTEM , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1921 | PARKING POSITION SWITCH CIRCUIT | Parking switch malfunction | < Ref. to DTC C1921 PARKING POSITION SWITCH CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1922 | HILL HOLD SWITCH CIRCUIT | Hill hold switch malfunction | < Ref. to DTC C1922 HILL HOLD SWITCH CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1935 | IGNITION SWITCH CIRCUIT | No match of IGN input | < Ref. to DTC C1935 IGNITION SWITCH CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1942 | POWER SUPPLY VOLTAGE | Electronic parking brake power supply voltage is faulty | < Ref. to DTC C1942 POWER SUPPLY VOLTAGE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1951 | ACTUATOR | Electronic parking brake actuator line is faulty | < Ref. to DTC C1951 ACTUATOR , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1954 | RH ACTUATOR | Electronic parking brake RH actuator is faulty | < Ref. to DTC C1954 RH ACTUATOR , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1955 | LH ACTUATOR | Electronic parking brake LH actuator is faulty | < Ref. to DTC C1955 LH ACTUATOR , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1956 | RH ACTUATOR CIRCUIT | Defective RH drive circuit | < Ref. to DTC C1956 RH ACTUATOR CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1957 | LH ACTUATOR CIRCUIT | Defective LH drive circuit | < Ref. to DTC C1957 LH ACTUATOR CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1971 | CLUTCH SENSOR | Defective clutch sensor | < Ref. to DTC C1971 CLUTCH SENSOR , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1983 | HIGH FREQUENCY OPERATION | Electronic parking brake operation is too frequent | < Ref. to DTC C1983 HIGH FREQUENCY OPERATION , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1984 | BRAKE MAINTENANCE MODE | Executing brake maintenance mode | < Ref. to DTC C1984 BRAKE MAINTENANCE MODE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| C1985 | FORBIDDEN STATE OF DYNAMIC ACTUATOR OPERATION | Electronic parking brake actuator is faulty | < Ref. to DTC C1985 FORBIDDEN STATE OF DYNAMIC ACTUATOR OPERATION , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0073 | CAN FAILURE, BUS 'OFF' DETECTION | Defective CAN communication | < Ref. to DTC U0073 CONTROL MODULE COMMUNICATION BUS OFF , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0100 | LOST COMMUNICATION WITH ECM/PCM "A" | Defective CAN communication | < Ref. to DTC U0100 LOST COMMUNICATION WITH ECM/PCM "A" , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0101 | LOST COMMUNICATION WITH TCM | Defective CAN communication | < Ref. to DTC U0101 LOST COMMUNICATION WITH TCM , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0126 | LOST COMMUNICATION WITH STEERING ANGLE SENSOR MODULE | Defective CAN communication | < Ref. to DTC U0126 LOST COMMUNICATION WITH STEERING ANGLE SENSOR MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0140 | LOST COMMUNICATION WITH BODY CONTROL MODULE | Defective CAN communication | < Ref. to DTC U0140 LOST COMMUNICATION WITH BODY CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0155 | LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE | Defective CAN communication | < Ref. to DTC U0155 LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0401 | INVALID DATA RECEIVED FROM ECM/PCM "A" | Defective CAN communication | < Ref. to DTC U0401 INVALID DATA RECEIVED FROM ECM/PCM "A" , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0402 | INVALID DATA RECEIVED FROM TCM | Defective CAN communication | < Ref. to DTC U0402 INVALID DATA RECEIVED FROM TCM , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0422 | INVALID DATA RECEIVED FROM BODY CONTROL MODULE | Defective CAN communication | < Ref. to DTC U0422 INVALID DATA RECEIVED FROM BODY CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0423 | INVALID DATA RECEIVED FROM INSTRUMENT PANEL CLUSTER CONTROL MODULE | Defective CAN communication | < Ref. to DTC U0423 INVALID DATA RECEIVED FROM INSTRUMENT PANEL CLUSTER CONTROL MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U0428 | INVALID DATA RECEIVED FROM STEERING ANGLE SENSOR MODULE | Defective CAN communication | < Ref. to DTC U0428 INVALID DATA RECEIVED FROM STEERING ANGLE SENSOR MODULE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U1235 | LOST COMMUNICATION WITH EyeSight | Defective CAN communication | < Ref. to DTC U1235 LOST COMMUNICATION WITH EYESIGHT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
| U1433 | INVALID DATA RECEIVED FROM EyeSight | Defective CAN communication | < Ref. to DTC U1433 INVALID DATA RECEIVED FROM EYESIGHT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > |
RENDER: 1.0x
NO RELATED
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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.