2004 Liberty P0302 P0305

Asked by Ryzen Mar 15, 2022 at 11:40 PM about the 2004 Jeep Liberty

Question type: Maintenance & Repair

Recently picked up a 2004 Jeep Liberty 3.7L and
unfortunately it started misfiring.  Throwing codes P0302
and P0305. Replaced all coil packs and spark plugs. Issue
still persists. I'm at a stand still here and am unsure why it's
misfiring. Car ran great for two weeks. Now the car shakes
at idle.

4 Answers
38,955

beatupchevy answered 2 years ago

what about the plug wires ? Are they worn out ? Scan for codes even if the light ain't on .

Mark helpful
307,265

Gene answered 2 years ago

Compression good? How about the injectors and fuel pressure? Intake vacuum leaks on missing cylinders?

Mark helpful
307,265

Gene answered about a year ago

P0123 TPS sensor circuit A output to ECM above specified voltage of 4.54 volts for more than 2 seconds, possible short in TPS or TPS wiring. A live data scan tool would be very helpful in tracking down if it is the sensor or wiring.

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Your Answer:

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