Possible Misfire Condition with DTCs Set

Some 2015 City Express models may have a misfire condition along with any of the following DTCs set in the Engine Control Module (ECM): P0011, P0075, P0300, P0301, P0302, P0303 and P0304.

The misfire may be caused by the incorrect wires being spliced together or a poor splice connection made during a previous repair to the engine EGI harness for a crank/no start condition.

Verify the correct wires were spliced together during the previous repair, which used the largest gauge red wire and largest gauge purple wire. (Fig. 8) If the incorrect wires were spliced, return the wires to the original routing and perform the splice repair again using the correct wires. After the wiring repair is made, clear the DTCs and evaluate engine operation.

Fig. 8

If the correct wires were spliced together, check the crimp at the splice for a poor connection. (Fig. 9) A DuraSeal slice sleeve should be used. Test the crimp quality by gently pulling each wire to ensure the wire does not move from the sleeve. Repair as necessary.

Fig. 9

For additional information, refer to #PIP5302A.

 

– Thanks to Tim Lightfoot

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