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Registered User
Join Date: Jun 2013
Posts: 3
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Help Needed on OBD Codes Fix
I would really appreciate your help. I have a 2003 C4S with 80,000 miles, and it is great.
However one problem that has recently started involves getting past 4000 RPM in any gear. Once you hit this 4000 RPM, there was a judder, like a misfuel, and the revs became jumpy and indeed stopped accelerating. Coils changed, same thing happens. Fault codes said crankshaft sensor and cylinder 2 electrical short to ground and fuel pump shutdown. Sensors replaced, plugs replaced - all running great - for 1 month. Now starting to happen again; yesterday it "hesitated" at around 5000 RPM and 90 MPH; no reaction, then later on same again then CEL is illuminated and power is lost. Turn on / off and drives fine but with CEL still on. The stored error code is now P1266 which some say is a short to cylinder no 2, and some say is fuel pump shut off. Eitherway, it is causing me issues! The garage has spent time and cleaned and checked wiring/connections and in the garage all checks out - until you accelerate hard. Any suggestions gratefully received. Thank you in advance. |
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10-17-2013, 04:51 AM
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Registered
Join Date: Jun 2012
Posts: 145
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P1266 Fuel shutoff malfunction monitor
Porsche's diag worksheet says the only possible cause is a faulty DME and to replace it... Before going that route, some more information on the fault codes will be needed. cylinder 2 electrical short to ground makes no sense to me, and there are numerous faults that could be related to the crank sensor. If you can, get the actual Pxxxx numbers. Is the garage a porsche specialist shop? |
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10-19-2013, 12:34 PM
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