Engine Management System Fault Codes [Toyota Camry XV10]

Code 1 – 1 flash, pause, 1 flash

Fine

There are no faults

Code 12 – 1 flash, pause, 2 flashes

RPM signal

No NE signal is sent to the ECM within a few seconds of engine start.

Code 13 – 1 flash, pause, 3 flashes

RPN signal

No NE signal is sent to the ECM when the engine speed is above 1500 rpm.

Code 14 – 1 flash, pause, 4 flashes

Ignition system

IGF signal is not received by the ECM 8 times in a row.

Electrical circuit of the ignition unit.

Code 16 – 1 flash, pause, 6 flashes

A/T control signal

Problems between the CPU motor and the A/T CPU in the ECM.

ECM block.

Code 21 – 2 flashes, pause, 1 flash

Main Oxygen Sensor. Main Oxygen Sensor Heater

Problems in the oxygen sensor electrical circuit.

Code 22 – 2 flashes, pause, 2 flashes

Coolant temperature

Open or short circuit in the electrical circuit of the coolant temperature sensor.

Code 24 – 2 flashes, pause, 4 flashes

Incoming air temperature sensor

Incoming air temperature sensor.

Code 25 – 2 flashes, pause, 5 flashes

Over-enrichment or over-leanness of the fuel mixture over a period of time.

Fuel injector.

Code 26 – 2 flashes, pause, 6 flashes

Over-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.

Code 27 – 2 flashes, pause, 7 flashes.

Open or short circuit in the electrical circuit of the additional oxygen sensor.

Auxiliary oxygen sensor or auxiliary oxygen sensor circuit.

Code 31 – 3 flashes, pause, 1 flash

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

Open or short circuit in the electrical circuit of the MAP sensor.

Electrical circuit of the MAP sensor.

Code 32 – 3 flashes, pause, 2 flashes.

Open or short circuit of the electrical circuit between contacts VS, VC or E2.

Air flow meter or air flow meter electrical circuit.

Code 41 – 4 flashes, pause, 1 flash

Open or short circuit in the electrical circuit of the throttle position sensor.

Throttle position sensor or throttle position sensor circuit.

Code 42 – 4 flashes, pause, 2 flashes

No STD signal for 8 seconds at engine speed between 3100 and 5000 rpm.

Vehicle speed sensor or vehicle speed sensor electrical circuit.

Code 43 – 4 flashes, pause, 3 flashes

No STA signal to ECM when engine speed is 800 rpm and vehicle is stationary.

Starter electrical circuit.

Code 51 – 5 flashes, pause, 1 flash

There is no IDL or NSV or A/C signal to the ECU when the E1 and TE1 contacts of the control connector are closed.

Air conditioner switch or switch electrical circuit.

Code 52 – 5 flashes, pause, 2 flashes

Open or short circuit in the electrical circuit of the knock sensor.

Knock sensor electrical circuit.

Code 53 – 5 flashes, pause, 3 flashes

Problems with the knock control system in the ECM unit.

ECM block.

Code 55 – 5 flashes, pause, 5 flashes

Detonation control (v6 engine)

Problems with the knock control system in the ECM unit.

ECM block.

Code 71 – 7 flashes, pause, 1 flash

EGR valve

EGR temperature sensor signal too low.
Air/fuel ratio malfunction.

EGR system.