Can a rear main seal leak cause the cylinders (1 and 4) to misfire??

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My mechanic is saying that the oil leaking on to the O2 sensor is causing the an issue with the wires and the misfire because the gas is not burning properly through the exhaust

eli_dion in Hoboken NJ

Mar 26, 2015

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What is your question?

Popular Answer

Can a rear main seal leak cause the cylinders (1 and 4) to misfire??

What is your question?

My mechanic is saying that the oil leaking on to the O2 sensor is causing the an issue with the wires and the misfire because the gas is not burning properly through the exhaust

eli_dion in Hoboken NJ

Mar 26, 2015

1 Reply

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CharlesAutomotiveon Mar 27, 2015

Could be the correct diagnosis. Has he tested the O2 sensor ohms?

eli_dionon Mar 27, 2015

I just had the O2 sensor replaced a week ago and he said that they looked ok. Not sure if he tested the ohms **I have to make a correction to my other comment. He said that it wasn't the O2 sensor causing the Misfire codes, but a different sensor. Can a rear main seal leak affect any sensors related to misfire codes on the engine? From what I've seen, it appears that the rear main seal is nowhere near any of the sensors.

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Popular Answer

What are the best Subaru repair shops?

RepairPal Certified shops can diagnose and repair your 2002 Subaru Impreza. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.