VW New Beetle - Poor engine starting performance | HELLA
VW
New Beetle
All models
Poor engine starting performance, excessive engine knocking at idle, engine runs in emergency mode.
If the above problem is raised, it could have several causes. Implausible values may cause the symptoms described. In addition, the following error codes may be stored in the engine control unit:
- P1556 – Turbocharging pressure, control limit is not reached.
In this case, proceed as follows:
- Disconnect wire harness multi-plug from the engine control unit and the coolant temperature sensor and perform a continuity test.
- Check contacts on both sides for corrosion and mechanical damage, repair if necessary.
- Check the ground connections.
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