Have a 2010 HHR with a misfire issue. Code 300.

What is your question?

Change spark plugs, coils have been replaced, fuel injectors have been replaced, mass air flow sensor replaced. Gas cap replaced. My daughter said it started after she put gas in it! I’m thinking it’s either bad gas or compression issue. So would I be wasting my time dropping the gas tank and replace the fuel pump and filter? Or is this another POS that GM put out like the Malabomb!

What makes this problem better or worse?

Misfire

How long has your 2010 Chevrolet HHR had this problem?

Couple months

Visitor

in Houston TX

Sep 7, 2020

Popular Answer

What are the best Chevrolet repair shops?

RepairPal Certified shops can diagnose and repair your 2010 Chevrolet HHR. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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What is your question?

Popular Answer

Have a 2010 HHR with a misfire issue. Code 300.

What is your question?

What makes this problem better or worse?

Misfire

How long has your 2010 Chevrolet HHR had this problem?

Couple months

Visitor

in Houston TX

Sep 7, 2020

1 Reply

Popular Answer

pushrodon Sep 7, 2020

I do not see any mention of diagnostic troubleshooting being performed.. Therefore is is moot to attempt assistance. Good luck!

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Popular Answer

What are the best Chevrolet repair shops?

RepairPal Certified shops can diagnose and repair your 2010 Chevrolet HHR. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.