Check Engine Light - 2002 A4 1.8T Q

May 31, 2006 2 Replies

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sivakanthp 20 years ago

What could be wrong?

This is the report from VAG-COM.

VAG-COM Version: Release 409.1-US

Chassis Type: 8E - Audi A4 B6 Scan: 01

------------------------------------------------------------------------------- Address 01: Engine Controller: 8E0 909 518 F Component: 1.8L R4/5VT G 0001 Coding: 0016701 Shop #: WSC 63351

2 Faults Found:
17964 - Charge Pressure Control: Negative Deviation P1556 - 002 - Lower Limit Exceeded - Intermittent
17544 - Long Term Fuel Trim Add. Fuel, P1136 - 001 - Bank1 System too Lean Readiness: 0000 0000

Thanks in advance. Siva

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Richard Goulding 20 years ago

You'd be better off asking this type of question on the VAG-COM mailing list. Go to

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for details.

Richard

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Petri Rehtonen 20 years ago

Because you are loosing boost and at same time have too lean error (possibly when cruising and the intake manifold pressure drops) it seems that you have a leak in your intake piping after turbo. The leak can also be in the numerous vacuum lines attached to the intake manifold.

You should pressure test your intake piping for leaks.

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