Question about 1995 Jaguar XJ6

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1996 jaguar xj6 dtc test code p1178

96 jaguar xj6 dtc test code p1178 lean fuel how do i fix it reset check engine light

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Fault code P1178Rich Fuelling Trim, Long Term (AMFR)Check for manifold air leaks, rectify as necessary Check for recorded MAFS fault code, rectify as necessary Clear fault code and perform service drive cycle to verify fault cleared Contact Jaguar Service Hotline if fault still present.

Taken from the Jag service manual.

Posted on Mar 30, 2010

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also get fail 17 fuel 17 same thing
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3 Answers

1996 Jaguar xj6


Many cars of that period could be reset by some ignition key sequence.
Try switching from the off position to the on (not start) several times within 15-30 seconds.
It won't hurt anything and might turn off the light.
If the problem is still present that caused the light to go on the first time, it will likely come on again after you start the engine.

I hope the reason for that alarm light has been since corrected.

Some cars needed to have the battery disconnected for several minutes to cancel the memory contents.
Newer cars will not likely respnd to that since flash memory is now common which retains the error code even without power.

Jun 17, 2008 | 1995 Jaguar XJ6

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