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 MANUALSHONDA2003CIVIC HX, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 16 (PGM-FI SYSTEM (HATCHBACK))
2003 Honda Civic HX, Standard
Section 16 (PGM-FI System (Hatchback))
2003 Honda Civic HX, StandardSECTION Section 16 (PGM-FI System (Hatchback))
WARNING: This page is about a different variant/trim than selected.
- Component Location Index
- DTC Troubleshooting
- Notes
- DTC P0107: MAP Sensor Circuit Low Voltage
- DTC P0108: MAP Sensor Circuit High Voltage
- DTC P1128: MAP Sensor Signal Lower Than Expected
- DTC P1129: MAP Sensor Signal Higher Than Expected
- DTC P0112: IAT Sensor Circuit Low Voltage
- DTC P0113:IAT Sensor Circuit High Voltage
- DTC P0116: ECT Sensor Range/Performance Problem
- DTC P0117: ECT Sensor Circuit Low Voltage
- DTC P0118: ECT Sensor Circuit High Voltage
- DTC P0122: TP Sensor Circuit Low Voltage
- DTC P0123: TP Sensor Circuit High Voltage
- DTC P1121: TP Sensor Signal Lower Than Expected
- DTC P1122: TP Sensor Signal Higher Than Expected
- DTC P0125: ECT Sensor Malfunction/Slow Response (2004-05 Models)
- DTC P0128: Cooling System Malfunction
- DTC P0134: A/F Sensor (Sensor 1) No Activity Detected
- DTC P0137: Secondary HO2S (Sensor 2) Circuit Low Voltage
- DTC P0138: Secondary HO2S (Sensor 2) Circuit High Voltage
- DTC P0139: Secondary HO2S (Sensor 2) Slow Response
- DTC P0141: Secondary HO2S (Sensor 2) Heater Circuit Malfunction
- DTC P0171: Fuel System Too Lean, DTC P0172: Fuel System Too Rich
- DTC P0300: Random Misfire and Any Combination of the Following: DTC P0301: No.1 Cylinder Misfire Detected, DTC P0302: No.2 Cylinder Misfire Detected, DTC P0303: No.3 Cylinder Misfire Detected, DTC P0304: No.4 Cylinder Misfire Detected
- DTC P0301: No. 1 Cylinder Misfire Detected, DTC P0302: No. 2 Cylinder Misfire Detected, DTC P0303: No. 3 Cylinder Misfire Detected, DTC P0304: No. 4 Cylinder Misfire Detected
- DTC P0325: Malfunction in Knock Sensor Circuit
- DTC P0335: CKP Sensor No Signal, DTC P0336: CKP Sensor Intermittent Interruption (2002-03 Models), DTC P0339: CKP Sensor Intermittent Interruption (2004-05 Models)
- DTC P0500: VSS Circuit Malfunction
- DTC P0563: ECM Power Source Circuit Unexpected Voltage
- DTC P0630: VIN Not Programmed or Mismatch (2004-05 Models)
- DTC P1106: BARO Sensor Range/Performance Problem (2002-03 Models), DTC P2227: BARO Sensor Range/Performance Problem (2004-05 Models)
- DTC P1107: BARO Sensor Circuit Low Voltage (2002-03 Models), DTC P1108: BARO Sensor Circuit High Voltage (2002-03 Models), DTC P2228: BARO Sensor Circuit Low Voltage (2004-05 Models), DTC P2229: BARO Sensor Circuit High Voltage (2004-05 Models)
- DTC P1157: A/F Sensor (Sensor 1) Circuit High Voltage (2004-05 Models)
- DTC P1158: A/F Sensor (Sensor 1) AFS Terminal Low Voltage (2002-03 Models), DTC P2252: A/F Sensor (Sensor 1) AFS Terminal Low Voltage (2004-05 Models)
- DTC P1159: A/F Sensor (Sensor 1) AFS + Terminal Low Voltage (2002-03 Models), DTC P2238: A/F Sensor (Sensor 1) AFS + Terminal Low Voltage (2004-05 Models)
- DTC P1163: A/F Sensor (Sensor 1) Slow Response (2002-03 Models), DTC P0133: A/F Sensor (Sensor 1) Slow Response (2004-05 Models)
- DTC P1164: A/F Sensor (Sensor 1) Circuit Range/Performance Problem (2002-03 Models), DTC P2A00: A/F Sensor (Sensor 1) Circuit Range/Performance Problem (2004-05 Models)
- DTC P1166: A/F Sensor (Sensor 1) Heater Circuit Malfunction (2002-03 Models), DTC P0135: A/F Sensor (Sensor 1) Heater Circuit Malfunction (2004-05 Models)
- DTC P1167: A/F Sensor (Sensor 1) Heater Circuit Malfunction (2002 Model)
- DTC P1297: ELD Circuit Low Voltage
- DTC P1298: ELD Circuit High Voltage
- DTC P1361: CMP Sensor B Intermittent Interruption (2002-03 Models), DTC P1362: CMP Sensor B No Signal (2002-03 Models), DTC P0365: CMP Sensor B No Signal (2004-05 Models), DTC P0369: CMP Sensor B Intermittent Interruption (2004-05 Models)
- DTC P0607: Malfunction in ECM Internal Circuit (2004-05 Models); DTC1607: Malfunction in ECM Internal Circuit (2002-03 Models)
- MIL Circuit Troubleshooting
- DLC Circuit Troubleshooting
- Injector Replacement
- A/F Sensor Replacement
- Secondary HO2S Replacement
- ECT Sensor Replacement
- CMP Sensor B Replacement
- IAT Sensor Replacement
- Knock Sensor Replacement
- CKP Sensor Replacement
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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.