Porsche 928 Workshop Manual page 72

929 Maintenance, Self-diagnosis
03
Error code 1124 Error code 1125
This error code indicates that the Lambda con- This error code indicates a fault in the area of
trol has detected that the mixture is too lean. the Lambda probe.
Possible faults:
Possible causes for too lean a mixture
Short-circuit to ground, Lambda probe
Air infiltration on the intake side
Short-circuit to ground
Short-circuit to positive
Break in the circuit
Air infiltration on the exhaust side before the
Lambda probe
Injection valve does not open
Testing the Lambda probe signal
Fuel pressure too low
Disconnect the Lambda probe plug
Note:
Only use a digital voltmeter to measure the
voltaae of the Lambda orobe. or use a com-
parable measuring device with an internal
resistance (Ri) of not less than 10 MD.
a
Trouble-shooting
03 - 25
Printed in Germany - XX, 1999