The Most Common DTC Issues in Honda Civic
Find out about the most common DTC (Diagnostic Trouble Code) problems with the Honda Civic and learn what every mechanic needs to know. This complete guide tells you everything you need to know about these common problems, from their symptoms and causes to how to fix them. Don’t miss out on this important tool for taking care of Honda Civics.
LIST OF HONDA CIVIC’S MOST COMMON 26 DTCS
DTC P1361
Cause: Faulty TDC sensor or wiring issue in the TDC sensor circuit.
Symptoms: Rough idling, stalling, reduced power, and difficulty starting the engine.
Solution: Replace the TDC sensor if faulty, check the wiring and connections in the TDC sensor circuit.
DTC 85-01
Cause: Faulty VSA modulator-control unit or malfunction in the VSA system.
Symptoms: VSA and ABS warning lights are illuminated, and the VSA system may not function properly.
Solution: Check the VSA system for proper operation, replace the VSA modulator-control unit if faulty.
DTC B123
Cause: Malfunction in the dashboard or center display unit.
Symptoms: Malfunction or incorrect display in the dashboard or center display unit.
Solution: Replace the dashboard or center display unit if faulty.
DTC U0416-68
Cause: Malfunction in the vehicle communication system or a faulty control module.
Symptoms: Warning lights on the dashboard may be illuminated, and the vehicle may not operate properly.
Solution: Check the vehicle communication system for proper operation, replace the control module if faulty.
DTC C1555
Cause: Malfunction in the ABS modulator-control unit or the ABS wheel speed sensor circuit.
Symptoms: ABS warning light may be illuminated, and the ABS system may not function properly.
Solution: Check the ABS system for proper operation, replace the ABS modulator-control unit or the ABS wheel speed sensor circuit if faulty.
DTC 95
Cause: Malfunction in the fuel tank pressure sensor circuit or a faulty fuel tank pressure sensor.
Symptoms: Check Engine light may be illuminated, and the vehicle may not operate properly.
Solution: Check the fuel tank pressure sensor circuit for proper operation, replace the fuel tank pressure sensor if faulty.
DTC P0113
Cause: Malfunction in the Intake Air Temperature (IAT) sensor or wiring issues in the IAT sensor circuit.
Symptoms: Check Engine light may be illuminated, and the engine may run rough or stall.
Solution: Replace the IAT sensor if faulty, check the wiring and connections in the IAT sensor circuit.
DTC P0118
Cause: Malfunction in the Engine Coolant Temperature (ECT) sensor or wiring issues in the ECT sensor circuit.
Symptoms: Check Engine light may be illuminated, and the engine may run poorly or overheat.
Solution: Replace the ECT sensor if faulty, check the wiring and connections in the ECT sensor circuit.
DTC P0128
Cause: Malfunction in the Engine Coolant Temperature (ECT) sensor or issues with the thermostat.
Symptoms: Check Engine light may be illuminated, and the engine may not reach normal operating temperature.
Solution: Replace the ECT sensor if faulty, replace the thermostat if stuck open.
DTC P0135
Cause: Malfunction in the oxygen sensor heater circuit or a faulty oxygen sensor.
Symptoms: Check Engine light may be illuminated, and the engine may run poorly or have reduced power.
Solution: Check the oxygen sensor heater circuit for proper operation,
DTC P0141
Cause: Malfunction in the oxygen sensor heater circuit or a faulty oxygen sensor.
Symptoms: Check Engine light may be illuminated, and the engine may run poorly or have reduced power.
Solution: Check the oxygen sensor heater circuit for proper operation, replace the oxygen sensor if faulty.
DTC P0171
Cause: Lean air/fuel mixture, vacuum leaks, or malfunction in the Mass Air Flow (MAF) sensor or other related sensors.
Symptoms: Check Engine light may be illuminated, and the engine may run poorly, misfire or hesitate.
Solution: Check for vacuum leaks, clean or replace the MAF sensor or other related sensors.
DTC P0301
Cause: Misfire in the cylinder #1, caused by a malfunction in the ignition system, fuel system, or mechanical issues.
Symptoms: Check Engine light may be illuminated, and the engine may run poorly, misfire or hesitate.
Solution: Check the ignition system, fuel system, and mechanical components for proper operation, replace faulty components as needed.
DTC P0420
Cause: Malfunction in the catalytic converter or a faulty oxygen sensor.
Symptoms: Check Engine light may be illuminated, and the vehicle may not pass emissions testing.
Solution: Replace the catalytic converter if faulty, replace the oxygen sensor if needed.
DTC P0730
Cause: Malfunction in the transmission control module, shift solenoids, or mechanical issues with the transmission.
Symptoms: Check Engine light may be illuminated, and the transmission may not shift properly or slip.
Solution: Check the transmission control module and shift solenoids for proper operation, inspect the transmission for mechanical issues, replace faulty components as needed.
DTC P1157
Cause: Malfunction in the Air/Fuel (A/F) sensor or a faulty A/F sensor heater circuit.
Symptoms: Check Engine light may be illuminated, and the engine may run poorly or have reduced power.
Solution: Check the A/F sensor and heater circuit for proper operation, replace the A/F sensor if faulty.
DTC P1298
Cause: Malfunction in the Electric Load Detector (ELD) circuit or a faulty ELD.
Symptoms: Check Engine light may be illuminated, and the vehicle may not start or operate properly.
Solution: Check the ELD circuit for proper operation, replace the ELD if faulty.
DTC P1399
Cause: Misfire in multiple cylinders, caused by a malfunction in the ignition system, fuel system, or mechanical issues.
Symptoms: Check Engine light may be illuminated, and the engine may run poorly, misfire or hesitate.
Solution: Check the ignition system, fuel system, and mechanical components for proper operation, replace faulty components as needed.
DTC P1457
Cause: Malfunction in the EVAP control system, typically caused by a faulty fuel tank pressure sensor, purge control solenoid, or gas cap.
Symptoms: Check Engine light may be illuminated, and the vehicle may not pass emissions testing.
Solution: Check the EVAP control system for proper operation, replace faulty components as needed.
DTC P1659
Cause: Malfunction in the Engine Control Module (ECM) or a wiring issue in the ECM circuit.
Symptoms: Check Engine light may be illuminated, and the engine may run poorly or have reduced power.
Solution: Check the ECM circuit for proper operation, replace the ECM if faulty.
DTC U0155
Cause: Malfunction in the instrument cluster or a communication issue between the instrument cluster and other modules.
Symptoms: Warning lights on the dashboard may be illuminated, and the vehicle may not operate properly.
Solution: Check the instrument cluster for proper operation, check for communication issues between the instrument cluster and other modules.
DTC 77-1
Cause: Malfunction in the engine control module or a wiring issue in the engine control module circuit.
Symptoms: Check Engine light may be illuminated, and the engine may run poorly or have reduced power.
Solution: Check the engine control module circuit for proper operation, replace the engine control module if faulty.
DTC 53-1
Cause: Malfunction in the right front wheel speed sensor or a wiring issue in the wheel speed sensor circuit.
Symptoms: ABS and VSA warning lights may be illuminated, and the ABS and VSA systems may not function properly.
Solution: Check the right front wheel speed sensor and circuit for proper operation, replace the wheel speed sensor if faulty.
DTC 7-2
Cause: Malfunction in the SRS control module or a wiring issue in the SRS control module circuit.
Symptoms: SRS warning light may be illuminated, and the airbags may not deploy in an accident.
Solution: Check the SRS control module circuit for proper operation, replace the SRS control module if faulty.
DTC 78-1
Cause: Malfunction in the rear ABS wheel speed sensor or a wiring issue in the rear ABS wheel speed sensor circuit.
Symptoms: ABS warning light may be illuminated, and the ABS system may not function properly.
Solution: Check the rear ABS wheel speed sensor and circuit for proper operation, replace the wheel speed sensor if faulty.
DTC B1079
Cause: Malfunction in the battery management system or a faulty battery.
Symptoms: Check Engine light may be illuminated, and the vehicle may not start or operate properly.
Solution: Check the battery management system for proper operation, replace the battery if faulty.
WHAT DOES THIS DTC MEAN FOR HONDA CIVIC?
DTC stands for Diagnostic Trouble Code. In Honda Civic, DTCs are used by the on-board diagnostics (OBD) system to identify and report faults or malfunctions in various systems, such as the engine, transmission, and emissions control. When a problem is detected, a DTC is generated and stored in the OBD system. These codes are designed to help mechanics and technicians quickly identify the source of the problem and make the necessary repairs. There are hundreds of DTC codes used in Honda Civic, each corresponding to a specific issue or malfunction.