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.
2001 Honda Prelude Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Diagnostic Trouble Code Identification
DIAGNOSTIC TROUBLE CODE IDENTIFICATION - PRELUDE
| DTC (MIL/D4 Code) (1) | Description | ||||||
|---|---|---|---|---|---|---|---|
| P0107 (3) | MAP Sensor Circuit Low Voltage | ||||||
| P0108 (3) | MAP Sensor Circuit High Voltage | ||||||
| P0112 (10) | Intake Air Temperature (IAT) Sensor Circuit Low Voltage | ||||||
| P0113 (10) | Intake Air Temperature (IAT) Sensor Circuit High Voltage | ||||||
| P0116 (86) | Engine Coolant Temperature (ECT) Sensor Circuit Range/Performance Problem | ||||||
| P0117 (6) | Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage | ||||||
| P0118 (6) | Engine Coolant Temperature (ECT) Sensor Circuit High Voltage | ||||||
| P0122 (7) | Throttle Position (TP) Sensor Circuit Low Voltage | ||||||
| P0123 (7) | Throttle Position (TP) Sensor Circuit High Voltage | ||||||
| P0131 (1) | Primary HO2S-1 Low Voltage | ||||||
| P0132 (1) | Primary HO2S-1 High Voltage | ||||||
| P0133 (61) | Primary HO2S-1 Slow Response | ||||||
| P0135 (41) | Primary HO2S-1 Heater Circuit Malfunction | ||||||
| P0137 (63) | Secondary HO2S-2 Low Voltage | ||||||
| P0138 (63) | Secondary HO2S-2 High Voltage | ||||||
| P0139 (63) | Secondary HO2S-2 Slow Response | ||||||
| P0141 (65) | Secondary HO2S-2 Heater Circuit Malfunction | ||||||
| P0171 (45) | Fuel System Too Lean | ||||||
| P0172 (45) | Fuel System Too Rich | ||||||
| P0300 (2) (71-74) | Random Misfire Detected | ||||||
| P0301 (71) | Cylinder No. 1 Misfire Detected | ||||||
| P0302 (72) | Cylinder No. 2 Misfire Detected | ||||||
| P0303 (73) | Cylinder No. 3 Misfire Detected | ||||||
| P0304 (74) | Cylinder No. 4 Misfire Detected | ||||||
| P0325 (23) | Knock Sensor (KS) Circuit Malfunction | ||||||
| P0335 (4) | Crankshaft Position Sensor Malfunction | ||||||
| P0336 (4) | Crankshaft Position Sensor Circuit Range/Performance Problem | ||||||
| P0401 (80) | EGR - Insufficient Flow Detected | ||||||
| P0420 (67) | Catalyst System Efficiency Below Threshold | ||||||
| P0451 (91) | Fuel Tank Pressure (FTP) Sensor Range/Performance Problem | ||||||
| P0452 (91) | Fuel Tank Pressure (FTP) Sensor Circuit Low Voltage | ||||||
| P0453 (91) | Fuel Tank Pressure (FTP) Sensor Circuit High Voltage | ||||||
| P0500 (17) | Vehicle Speed Sensor (VSS) Circuit Malfunction | ||||||
| P0505 (14) | Idle Control System Malfunction | ||||||
| P0715 (15) (3) | Automatic Transaxle | ||||||
| P0720 (9) (3) | Automatic Transaxle | ||||||
| P0725 (11) (3) | Automatic Transaxle | ||||||
| P0730 (41) (3) | Automatic Transaxle | ||||||
| P0740 (40) (3) | Automatic Transaxle | ||||||
| P0753 (7)(3) | Automatic Transaxle | ||||||
| P0758 (8) (3) | Automatic Transaxle | ||||||
| P0763 (70) (3) | Automatic Transaxle | ||||||
| P1106 (13) | BARO Sensor Circuit Range/Performance Problem | ||||||
| P1107 (13) | BARO Sensor Circuit Low Voltage | ||||||
| P1108 (13) | BARO Sensor Circuit High Voltage | ||||||
| P1121 (7) | Throttle Position Lower Than Expected | ||||||
| P1122 (7) | Throttle Position Higher Than Expected | ||||||
| P1128 (5) | Manifold Absolute Pressure (MAP) Lower Than Expected | ||||||
| P1129 (5) | Manifold Absolute Pressure (MAP) Higher Than Expected | ||||||
| P1259 (22) | VTEC System Malfunction | ||||||
| P1297 (20) | Electrical Load Detector Circuit Low Voltage | ||||||
| P1298 (20) | Electrical Load Detector Circuit High Voltage | ||||||
| P1359 (8) | CKP/TDC Sensor Connector Disconnection | ||||||
| P1361 (8) | TDC Sensor Circuit - Intermittent Interruption | ||||||
| P1362 (8) | TDC Sensor Circuit - No Signal | ||||||
| P1381 (9) | Cylinder Position Sensor - Intermittent Interruption | ||||||
| P1382 (9) | Cylinder Position Sensor - No Signal | ||||||
| P1456 (90) | EVAP System Leak Detected (Fuel Tank System) | ||||||
| P1457 (90) | EVAP System Leak Detected (EVAP Canister System) | ||||||
| P1491 (12) | EGR Valve - Insufficient Lift Detected | ||||||
| P1498 (12) | EGR Valve Position Sensor Circuit High Voltage | ||||||
| P1508 (14) | Idle Air Control (IAC) Valve Circuit Malfunction | ||||||
| P1607 (-) | PCM Internal Circuit Failure | ||||||
| P1655 (30) | SEAF/SEFA Signal Line Failure (A/T) | ||||||
| P1705 (5) (3) | Automatic Transaxle | ||||||
| P1706 (6) (3) | Automatic Transaxle | ||||||
| P1709 (24) (3) | Automatic Transaxle | ||||||
| P1738 (25) (3) | Automatic Transaxle | ||||||
| P1739 (26) (3) | Automatic Transaxle | ||||||
| P1753 (1) (3) | Automatic Transaxle | ||||||
| P1768 (16) (3) | Automatic Transaxle | ||||||
| P1773 (23) (3) | Automatic Transaxle | ||||||
| P1790 (3) (3) | Automatic Transaxle | ||||||
| P1791 (4) (3) | Automatic Transaxle | ||||||
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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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