Fault code | Electrical circuit | Diagnosis | Fault area |
Code 1 - 1 flash, pause, 1 flash | Fine | No faults | |
Code 12 - 1 flash, pause, 2 flashes | RPM signal | No NE signal to the ECM within a few seconds of starting the engine. No G signal to ECU at engine speed between 500 and 4000 rpm. | The electrical circuit of the ignition distributor. Distributor. Ignition block. The electrical circuit of the ignition unit. Starter circuit. ECM block. |
Code 13 - 1 flash, pause, 3 flashes | RPN signal | No NE signal to ECM when engine speed is over 1500 rpm. | The electrical circuit of the ignition distributor. Distributor. The electrical circuit of the ignition unit. Ignition block. ECM block. |
Code 14 - 1 flash, pause, 4 flashes | Ignition system | The IGF signal is not received in a row 8 times to the ECM. | The electrical circuit of the ignition unit. Ignition block. ECM block. |
Code 16 - 1 flash, pause, 6 flashes | Control signal A/T | Problems between CPU motor and A/T CPU in ECM. | ECM block. |
Code 21 - 2 flashes, pause, 1 flash | Main oxygen sensor. Primary Oxygen Sensor Heater | Problems in the electrical circuit of the oxygen sensor. An open or short circuit in the oxygen sensor heater power supply circuit. | The electrical circuit of the oxygen sensor. ECM block. Oxygen sensor heater. |
Code 22 - 2 flashes, pause, 2 flashes | Coolant temperature | Open or short circuit in the electrical circuit of the coolant temperature sensor. | The electrical circuit of the coolant temperature sensor. Coolant temperature sensor. ECM block. |
Code 24 - 2 flashes, pause, 4 flashes | Intake air temperature sensor | Open or short circuit in the electrical circuit of the incoming air sensor. | Inlet air temperature sensor. Inlet air temperature sensor circuit. ECM block. |
Code 25 - 2 flashes, pause, 5 flashes | Air/Fuel Ratio Malfunction | Re-enrichment or re-depletion of the fuel mixture for a certain period of time. | Fuel burner. oxygen sensor. ECM block. Fuel system pressure. Coolant temperature sensor. Air temperature sensor. Air leak. Air flow meter. Engine air supply system. Ignition system. |
Code 26 - 2 flashes, pause, 6 flashes | Rich fuel mixture | Re-enrichment of the fuel mixture or open or short circuit in the electrical circuit of the oxygen sensor. | Fuel injector or fuel injector electrical circuit. Coolant temperature sensor or coolant temperature sensor circuit. Air temperature sensor or air temperature sensor circuit. Air flow meter. Oxygen sensor or oxygen sensor circuit. Cold start fuel injector. ECM block. |
Code 27 - 2 flashes, pause, 7 flashes. | Additional oxygen sensor. | Open or short in the electrical circuit of the additional oxygen sensor. | Auxiliary oxygen sensor or auxiliary oxygen sensor circuit. ECM block. |
Code 31 - 3 flashes, pause, 1 flash | Air flow meter | Open or short circuit in the electrical circuit between contacts VC and E2. | Air flow meter or air flow meter electrical circuit (V6 engine). |
Code 31 - 3 flashes, pause, 1 flash | Sensor (IDA) absolute pressure in the intake manifold | Open or short circuit in the electrical circuit of the MAP sensor. | The electrical circuit of the MAP sensor. |
Code 32 - 3 flashes, pause, 2 flashes. | Air flow meter (V6 engine). | Open or short circuit in the electrical circuit between contacts VS, VC or E2. | Air flow meter or air flow meter electrical circuit. ECM block. |
Code 41 - 4 flashes, pause, 1 flash | Throttle position sensor | Open or short circuit in the electrical circuit of the throttle position sensor. | Throttle position sensor or throttle position sensor circuit. ECM block. |
Code 42 - 4 flashes, pause, 2 flashes | Vehicle speed sensor | No STD signal for 8 seconds at engine speed between 3100 and 5000 rpm. | Vehicle speed sensor or vehicle speed sensor circuit. ECM block. |
Code 43 - 4 flashes, pause, 3 flashes | starter signal | No STA signal to ECM when engine speed is 800 rpm and vehicle is stationary. | Starter circuit. Egnition lock. Main motor relay. ECM block. |
Code 51 - 5 flashes, pause, 1 flash | Switch status | There is no IDL or NSV or A / C signal to the ECU when contacts E1 and TE1 of the control connector are closed. | Air conditioner switch or switch circuit. Air conditioning booster. Starter lock (air conditioner). Throttle position sensor. ECM block. |
Code 52 - 5 flashes, pause, 2 flashes | Knock sensor | Open or short circuit in the electrical circuit of the knock sensor. | The electrical circuit of the knock sensor. ECM block. |
Code 53 - 5 flashes, pause, 3 flashes | Detonation control | Problems with the knock control system in the ECM. | ECM block. |
Code 55 - 5 flashes, pause, 5 flashes | knock control (V6 engine) | Problems with the knock control system in the ECM. | ECM block. |
Code 71 - 7 flashes, pause, 1 flash | EGR valve | EGR temperature sensor signal too low. Air/fuel ratio malfunction. | EGR system. EGR temperature sensor or EGR temperature sensor circuit. Switching vacuum valve of the EGR system. ECM block. |