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Makes 🢒 Buick 🢒 2007 🢒 Allure 🢒 Bulletins 🢒 Engine Light On Rough Idle Or Will not Start (3.8L L26) - keywords crank harness intermittent MIL P0300 P0336 P0335 P0341 sensor SES wire

Engine Light On Rough Idle Or Will not Start (3.8L L26) - keywords crank harness intermittent MIL P0300 P0336 P0335 P0341 sensor SES wire

Subject: Engine Light On, Rough Idle, or Will Not Start (3.8L L26)

Models:2007 Buick LaCrosse and Allure with L26 Engine
2007 Pontiac Grand Prix with L26 Engine


The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:

Check Engine Light on, has a rough idle, or will not start. The PCM may store one or more of the following DTC: P0300 P0336 P0335 P0340 P0341.

Recommendation/Instructions:

Inspect the Crankshaft Sensor wire harness for contact with the A/C Compressor pulley. Repair and reroute wiring as necessary

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.