|
Diagnostic Trouble Code (DTC) |
System Indicated |
|---|---|
|
0 |
Engine Control Module (ECM) |
|
1 |
Heated Oxygen Sensor (HO2S) |
|
3 |
Manifold Absolute Pressure (MAP Sensor) |
|
4 |
Crankshaft Position (CKP Sensor) |
|
6 |
Engine Coolant Temperature (ECT Sensor) |
|
7 |
Throttle Position (TP Sensor) |
|
8 |
Top Dead Center Position (TDC Sensor) |
|
9 |
No. 1 Cylinder Position (CYP Sensor) |
|
10 |
Intake Air Temperature (IAT Sensor) |
|
13 |
Barometric Pressure (BARO Sensor) |
|
14 |
Idle Air Control (IAC Valve) |
|
15 |
Ignition Output Signal |
|
16 |
Fuel Injector |
|
17 |
Vehicle Speed Sensor (VSS) |
|
20 |
Electrical Load Detector (ELD) |
|
21 |
Variable Valve Timing & Valve Lift Electronic Control Solenoid Valve (VTEC Solenoid Valve) |
|
22 |
Variable Valve Timing & Valve Lift Electronic Control Pressure Switch (VTEC Pressure Switch) |
|
23 |
Knock Sensor (KS) |
|
30 |
A/T FI Signal A |
|
31 |
A/T FI Signal B |
|
41 |
Heated Oxygen Sensor (HO2S) Heater |
|
43 |
Fuel Supply System |
To determine if your ECU has an error code:
Locate the ECU under the carpet in the passenger foot well.
Find the red LED in the center of the ECU.
Turn the ignition to ON. The red LED should flash once when this happens to indicate that the ECU has power.
If there are no further flashes then there are no error codes.
If there are further flashes then there are one or more error codes.
Honda ECU error codes
1 Oxygen Sensor "A" (Primary) defective circuit or unplugged / defective sensor
2 Oxygen Sensor "B" defective circuit or unplugged / defective sensor
3 MAP Sensor (Manifold Absolute Pressure) defective circuit or unplugged / defective sensor
4 CKP Sensor (Crankshaft Position Sensor) defective circuit or unplugged / defective sensor
5 MAP Sensor (Manifold Absolute Pressure) mechanical problem / disconnected piping
6 ECT Sensor (Engine Coolant Temperature) defective circuit or unplugged / defective sensor
7 TP Sensor (Throttle Position) defective circuit or unplugged / defective sensor
8 TDC Sensor (Top Dead Center) defective circuit or unplugged / defective sensor
9 CYP Sensor (Cylinder) defective circuit or unplugged / defective sensor
10 IAT Sensor (Intake Air Temperature) defective circuit or unplugged / defective sensor
12 EGR Lift Sensor (Exhaust Gas Recirculation) defective circuit or unplugged / defective sensor
13 BARO Sensor (Atmospheric Pressure) defective circuit or unplugged / defective sensor
14 IAC Valve (Idle Air Control) defective circuit or unplugged / defective sensor
15 Ignition Output Signal missing or defective ignition output signal
16 Fuel Injector System defective circuit or unplugged / defective fuel injector
17 VSS (Vehicle Speed Sensor) defective circuit or unplugged / defective sensor
19 Automatic Transmission Lock Up Control Solenoid Valve defective circuit or unplugged / defective solenoid valve
20 Electrical Load Detector defective circuit or unplugged / defective sensor
21 VTEC Solenoid Valve defective circuit or unplugged / defective solenoid valve
22 VTEC Oil Pressure Switch defective circuit or unplugged / defective oil pressure switch
23 KS (Knock Sensor) defective circuit or unplugged / defective sensor
30 Automatic Transmission Signal: "A" / SEAF / SEFA / TMA or TMB defective circuit or unplugged / defective sensor
31 Automatic Transmission Signal "B" defective circuit or unplugged / defective sensor
41 Primary Oxygen Sensor - Heater circuit malfunction
43 Fuel Supply System defective or malfunctioning fuel supply system
45 System Too Lean or Too Rich malfunction in the fuel monitoring systems
48 LAF Sensor (Lean Air Fuel) defective circuit or unplugged / defective sensor
54 CKF Sensor (Crankshaft Speed Fluctuation) defective circuit or unplugged / defective sensor
58 TDC Sensor 2 (Top Dead Center) defective circuit or unplugged / defective sensor
61 Oxygen Sensor, Heated - Sensor 1 (Primary) high voltage, low voltage, or slow response
63 Oxygen Sensor, Heated - Sensor 2 (Secondary) high voltage, low voltage, or slow response
65 Oxygen Sensor Heater (Secondary) malfunctioning or defective oxygen sensor heater
67 Catalyst system Efficiency Below Threshold malfunctioning or defective catalyst system
70 Automatic Transmission malfunction with the automatic transmission controls
71 Cylinder 1 Misfire or a Random Misfire a condition is present that is creating a cylinder misfire
72 Cylinder 2 Misfire or a Random Misfire a condition is present that is creating a cylinder misfire
73 Cylinder 3 Misfire or a Random Misfire a condition is present that is creating a cylinder misfire
74 Cylinder 4 Misfire or a Random Misfire a condition is present that is creating a cylinder misfire
75 Cylinder 5 Misfire or a Random Misfire a condition is present that is creating a cylinder misfire
76 Cylinder 6 Misfire or a Random Misfire a condition is present that is creating a cylinder misfire
80 Exhaust Gas Recirculation insufficient flow detected
86 ECT Sensor (Engine Coolant Temperature) circuit range / performance problem
90 Evaporative Emission Control System leak detected in the fuel tank area
91 Fuel Tank Pressure Sensor low input
92 Evaporative Emission Control System insufficient purge flow