Intake manifold temperature sensor defective
- Check the sensor
Fuel temperature sensor defective
- Check the sensor
Injector needle stroke sensor defect
- Check the sensor
The injection start valve is leaky or faulty
- Check the valve
The air flow meter potentiometer is faulty
- Check the potentiometer
The air mass meter is faulty
- Check the flow meter
The exhaust gas recirculation system is faulty
- Check the system
Leak in the intake tract
- Check and, if necessary, eliminate leaks
Boost air pressure too high
- Check turbocharger and boost pressure control
The fuel cut-off valve is leaky or "jammed"
- Check the fuel shut-off valve
Defect of altitude corrector
- Check the altitude corrector
Fuel injection start The fuel injection pump is set incorrectly
- Check the feed start and adjust if necessary
The fuel filter is clogged
- Replace the filter
The engine speed sensor is faulty
- Check the sensor
Engine does not start or stalls after starting
Insufficient power supply to the control unit or power supply wire break
- Check fuses 21 and 27, as well as the surge protection relay
The spool stroke potentiometer is faulty
- Check the potentiometer
The flow regulator is faulty
- Check the regulator
The engine does not start or starts with difficulty
The engine speed sensor is faulty
- Check the sensor
Coolant temperature sensor is faulty
- Check the sensor
Preheating system defective
- Check the preheating system
The engine runs unevenly and jerkily
Injector needle stroke sensor defect
- Check the sensor
Leak in the intake tract
- Check and, if necessary, eliminate leaks
Fuel injection start The fuel injection pump is set incorrectly
- Check the feed start and adjust if necessary
The engine speed sensor is faulty
- Check the sensor
The original text is available on the website: AUDImanual