Help with CEL
ECU Fault Codes
OBDO/OBD1 CEL Codes
1 - Oxygen Sensor A (primary)
2 - Oxygen Sensor B (secondary)
3 - MAP Sensor (Manifold Absolute Pressure)
4 - CKP Sensor (Crankshaft Position Sensor)
5 - MAP Sensor (Manifold Absolute Pressure)
6 - ECT Sensor (Engine Coolant Temperature)
7 - TP Sensor (Throttle Position TPS)
8 - TDC (Top Dead Center)
9 - CYP Sensor (Cylinder)
10 - IAT Sensor (Intake Air Temperature)
12 - EGR Lift Sensor (Exhaust Gas Recirculation)
13 - BARO Sensor (Atmospheric Pressure)
14 - IAC Valve (Idle Air Control)
15 - Ignition Output Signal
16 - Fuel Injector System
17 - VSS (Vehicle Speed Sensor)
19 - AT Lock UP Control Solenoid Valve
20 - Electrical Load Detector
21 - VTEC Solenoid Valve
22 - VTEC Oil Pressure Switch
23 - KS (knock sensor)
30 - Automatic Transmission Signal "A"
31 - Automatic Transmission Signal "B"
41 - Primary Oxygen Sensor Heater
43 - Fuel Supply System
45 - System Too Lean or Too Rich
48 - LAF Sensor (Lean Air Fuel)
54 - CKF Sensor (Crankshaft Speed Fluctuation)
58 - TDC Sensor 2 (Top Dead Center)
61 Oxygen Sensor, Heated - Sensor 1 (Primary)
63 - Oxygen Sensor, Heated - Sensor 2 (Secondary)
65 - Oxygen Sensor, Heater (secondary)
67 - Catalyst system Efficiency Below Threshold
70 - Automatic Transmission
71 - Cylinder 1 Misfire or a Random Misfire
72 - Cylinder 2 Misfire or a Random Misfire
73 - Cylinder 3 Misfire or a Random Misfire
74 - Cylinder 4 Misfire or a Random Misfire
75 - Cylinder 5 Misfire or a Random Misfire
76 - Cylinder 6 Misfire or a Random Misfire
OBDO/OBD1 CEL Codes
1 - Oxygen Sensor A (primary)
2 - Oxygen Sensor B (secondary)
3 - MAP Sensor (Manifold Absolute Pressure)
4 - CKP Sensor (Crankshaft Position Sensor)
5 - MAP Sensor (Manifold Absolute Pressure)
6 - ECT Sensor (Engine Coolant Temperature)
7 - TP Sensor (Throttle Position TPS)
8 - TDC (Top Dead Center)
9 - CYP Sensor (Cylinder)
10 - IAT Sensor (Intake Air Temperature)
12 - EGR Lift Sensor (Exhaust Gas Recirculation)
13 - BARO Sensor (Atmospheric Pressure)
14 - IAC Valve (Idle Air Control)
15 - Ignition Output Signal
16 - Fuel Injector System
17 - VSS (Vehicle Speed Sensor)
19 - AT Lock UP Control Solenoid Valve
20 - Electrical Load Detector
21 - VTEC Solenoid Valve
22 - VTEC Oil Pressure Switch
23 - KS (knock sensor)
30 - Automatic Transmission Signal "A"
31 - Automatic Transmission Signal "B"
41 - Primary Oxygen Sensor Heater
43 - Fuel Supply System
45 - System Too Lean or Too Rich
48 - LAF Sensor (Lean Air Fuel)
54 - CKF Sensor (Crankshaft Speed Fluctuation)
58 - TDC Sensor 2 (Top Dead Center)
61 Oxygen Sensor, Heated - Sensor 1 (Primary)
63 - Oxygen Sensor, Heated - Sensor 2 (Secondary)
65 - Oxygen Sensor, Heater (secondary)
67 - Catalyst system Efficiency Below Threshold
70 - Automatic Transmission
71 - Cylinder 1 Misfire or a Random Misfire
72 - Cylinder 2 Misfire or a Random Misfire
73 - Cylinder 3 Misfire or a Random Misfire
74 - Cylinder 4 Misfire or a Random Misfire
75 - Cylinder 5 Misfire or a Random Misfire
76 - Cylinder 6 Misfire or a Random Misfire
Post pictures of the engine code stamped on the block. Then post a picture of the ecu serial numbers. Engine block code it to the left of the header right before the transmission meets the block. If it's a 94 DX, you'll most likely see something like D15B7.
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