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Re: What are codes p0307 and p0138 on dodge ram 2500 mean
P0307, is misfire detected cylinder #7
P0138 is O2 sensor high voltage detected bank two, this code is a resualt of unburned fuel from the misfire in cylinder #7
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Could be a problem with the wiring for the injector or the coil. Or even the crank sensor. The computer "sees" the drop in RPM to peg a cylinder for a miss. Do you think the miss is really there ?
P0138 DODGE - O2 sensor 1/2 Circuit highhttp://engine-codes.com/p0138_dodge.htmlForum CodePossible causes- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted - Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection - Faulty Rear Heated Oxygen Sensor Bank 1 - Inappropriate fuel pressure - Faulty fuel injectors - Intake air leaks may be faulty - Exhaust gas leaks Tech notes Replacing the rear O2 Sensor bank 1 usually takes care of the problem.
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