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Fault codes

Jkienzle
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Jkienzle Member

Jkienzle

Posted
Posted

I’ve been having some issues with my wife’s 996 C4S 2003 .Drove it today and started running ruff cel light on and codes p1371&p1362 and two miss fire codes. Had some problems a few months ago but running fine lately 

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Loren Member

Loren

Posted
  • Admin
Posted

P1362 Valve Lift Control, Cylinder 4 - Above Limit

Possible fault cause:

- A valve does not switch to large lift
- Several valves (various cylinders) do not switch to large lift

 

P1371 Valve Lift Control Checksum Error - Above Limit

Possible fault cause:
- A valve does not switch to large lift
- Several valves (various cylinders) do not switch to large lift

 

Could be a bad valve. Best do a compression test.

And/or diagnose further with a PST2.

 

Jkienzle Member

Jkienzle

Posted
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Posted

I have done. A compression check #6 a little lower then  the rest about 15 psi  and #6 plug a little darker then the rest but not bad  it is oil on plug and a little smoke on start up cold . I’ve been having miss fire problems but replaced injectors maf and some other parts when I was in there .

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