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.
2000 Honda Prelude Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Controls - Self-Diagnostics
- Connector Identification
- Diagnostic Trouble Code Identification
- Diagnostic Tests
- Notes
- Malfunction Indicator Light (Mil) Malfunction
- DTC P0107: Map Sensor Circuit Low Voltage Input
- DTC P0108: Map Sensor Circuit High Voltage Input
- DTC P0112: Intake Air Temperature (IAT) Sensor Low Voltage Input
- DTC P0113: Intake Air Temperature (IAT) Sensor High Voltage Input
- DTC P0116: Engine Coolant Temperature (ECT) Sensor Range/Performance Problem
- DTC P0117: Engine Coolant Temperature (ECT) Sensor Low Voltage Input
- DTC P0118: Engine Coolant Temperature (ECT) Sensor High Voltage Input
- DTC P0122: Throttle Position (TP) Sensor Low Voltage Input
- DTC P0123: Throttle Position (TP) Sensor High Voltage Input
- DTC P0131: Primary Ho2S-1 Sensor Low Voltage
- DTC P0132: Primary Ho2S-1 Sensor High Voltage
- DTC P0133: Primary Ho2S-1 Sensor Slow Response
- DTC P0135 Or DTC P0141: Ho2S Sensor Heater Circuit Malfunction
- DTC P0137: Secondary Ho2S-2 Sensor Low Voltage
- DTC P0138: Secondary Ho2S-2 Sensor High Voltage
- DTC P0139: Secondary Ho2S-2 Sensor Slow Response
- DTC P0171 & DTC P0172: Fuel Supply System (Too Lean Or Too Rich)
- DTC P0300 & P0301-P0304: Random Cylinder Misfire Detected
- DTC P0301-P0304: Misfire In One Cylinder Detected
- DTC P0325: Knock Sensor (KS) Circuit Malfunction
- DTC P0335, DTC P0336, DTC P1361 & DTC P1362: CKP/TDC Sensor
- DTC P0401: EGR Insufficient Flow
- DTC P0420: Catalytic System Efficiency Below Threshold
- DTC P0451: Fuel Tank Pressure (Ftp) Circuit Range/Performance Problem
- DTC P0452: Fuel Tank Pressure (Ftp) Sensor Low Voltage
- DTC P0453: Fuel Tank Pressure (Ftp) Sensor High Voltage
- DTC P0500: Vehicle Speed Sensor (VSS) Range/Performance Problem
- DTC P0505: Idle Control System Malfunction
- DTC P1106: BARO Sensor Range/Performance Problem
- DTC P1107 & DTC P1108: BARO Sensor
- DTC P1121 & DTC P1122: Throttle Position (TP) Sensor
- DTC P1128: Manifold Absolute Pressure (Map) Lower Than Expected
- DTC P1129: Manifold Absolute Pressure (Map) Higher Than Expected
- DTC P1259: VTEC Pressure Switch & Solenoid Valve Circuit
- DTC P1297: Electrical Load Detector (Eld) Low Voltage Input
- DTC P1298: Electrical Load Detector (Eld) High Voltage Input
- DTC P1359: Crankshaft Position/Top Dead Center (CKP/TDC) Sensor
- DTC P1381 & DTC P1382: CYP Sensor
- DTC P1456: EVAP System Leak Detected
- DTC P1457: EVAP System Leak Detected (Canister System)
- DTC P1491: EGR System Malfunction
- DTC P1498: EGR Valve Lift Sensor High Voltage
- DTC P1508: Idle Air Control (IAC) Valve
- DTC P1607: Pcm Internal Circuit
- DTC P1655: SEAF/SEFA A/T Signal Line Failure
Factory Service Tools
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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.
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