VW New Beetle - Poor engine starting performance | HELLA
VW
New Beetle
All models
Poor engine starting performance,
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.
- Check that the coolant temperature sensor functions perfectly. At 80 °C, the sensor should have a resistance of 275 - of 375 ohms. If the sensor is defective, it must be replaced.
Important safety notice
The following technical information and tips for practical use have been set up by HELLA in order to offer professional support to automotive workshops in their daily work. The information available here on this website is only to be used by appropriately trained specialist staff.
The reprinting, distribution, reproduction, exploitation in any form and disclosure of the contents of this document, even in part, is prohibited without our express written approval and indication of the source. The schematic illustrations, figures and descriptions are for explanation and presentation of the document text and cannot be used as a basis for installation or design. All rights reserved.
Not helpful at all
Very helpful