replaced rotor cap plugs wires o2sensors mass airflow sensor and still getting code p0306 and it has a distributor and a throttle body, so what now
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1997 GMC Yukon Question: whats causing the p0306 code
Answer #1pushrod December 09, 2012, 03:50Master
Did you clear the code after repair? If so check compression and for a vacuum leak on or near # 6 cyl. Third cyl on pass. side.
Answer #2your.mechanic December 09, 2012, 20:38Master
check the coil
Replypushrod, December 09, 2012, 20:59Master
Only one coil for all cylinders. Should not set po306.