Self-diagnosis function. Multipoint fuel injection system (MPI)

If a malfunction occurs in any of the following elements of the distributed injection system (MPI) engine warning light comes on («CHECK ENGINE») (pic. 7.1).



If the check engine light stays on with the engine running, check for the DTC:

However, the control lamp should come on and stay on for 5 seconds after the ignition is switched on.

Elements and conditions that can cause the check engine light to come on (MIL)

Code	Element being diagnosed
—	Electronic engine control unit (cars with manual gearbox) or an electronic engine and automatic transmission control unit (vehicles with automatic transmission) .
P0105	atmospheric sensor (barometric) pressure and its circuits
Р0110	Intake manifold air temperature sensor and circuit
Р0115	Coolant temperature sensor and its circuits
P0120	Throttle position sensor its circuit
P0125	Feedback system (fuel supply) and his chains
P0135	Front Oxygen Sensor Heating Element (sensor 1)
P0136	Rear oxygen sensor (sensor 2) and his chains
P0141	Rear Oxygen Sensor Heating Element (sensor 2)
P0170	Fuel system malfunction
R0201	Nozzle No. 1 and its chain
P0202	Nozzle No. 2 and its chain
P0203	Nozzle No. 4 and its chain
Р0300*	Ignition coil (power transistor) and her chain
P0301	1st cylinder misfire detection
P0302	Detection of misfires in the 2nd cylinder
P0303	Detection of misfires in the 3rd cylinder
Р0304	4th cylinder misfire detection
P0335	Crankshaft position sensor and its circuit
P0340	Camshaft position sensor and its circuit
Р0403	EGR valve and its electrical circuit
Р0420	Malfunction of the catalytic converter
P0443	Edsorber purge solenoid valve and its circuit
P0505	Servo drive of the engine crankshaft speed controller at idle (ISC) and his chains

Notes

• 1. If the control lamp lights up due to a malfunction of the electronic engine control unit (cars with manual gearbox) or an electronic engine control unit and automatic transmission (vehicles with automatic transmission), communication between the MUT-II and the electronic engine control unit (cars with manual gearbox) or an electronic engine control unit and automatic transmission (vehicles with automatic transmission) is not possible and the DTC cannot be read.
• 2. As soon as the electronic engine control unit (cars with manual gearbox) or electronic control unit for engine and automatic transmission (vehicles with automatic transmission) detected a malfunction, the engine malfunction indicator lamp lights up every time the engine is restarted and the same malfunction is displayed again. However, for the position marked with «*» in the table, the control lamp lights up only once at the first detection of a malfunction.
• An enabled control lamp can only be turned off under the following conditions:
• (1) When the engine control unit (cars with manual gearbox) or an electronic engine and automatic transmission control unit (vehicles with automatic transmission) within three * times identified a malfunction in the transmission.
• * in this case «once» indicates the period from start to stop of the engine.
• (2) In the misfire judgment mode when the driving conditions of the vehicle (engine speed, coolant temperature, etc.) similar to the condition in which this fault was first detected.
• «Sensor 1» means that the sensor is installed closer to the engine, and «sensor 2» means the sensor is installed further, compared to the first, from the engine.