I have a 2008 Chevy avalanche that keeps getting a p1174 code. It usually comes on as I’m going up a gradual incline around 30-45mph. Sometimes you can tell when it’s about to happen because you’ll feel the truck hesitating and see the rpm hand hunting (fluctuating) between 1000 and 2000 rpm. Then further down the road, the code appears.

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P1174 CHEVROLET - Fuel Trim Cylinder Balance Bank 1 7 | Add Comment Possible causes Clogged Fuel Injectors Faulty Oxygen sensor Ignition problem Fuel injection problem Engine mechanical condition What does this mean? Tech notes The sometimes is triggered by clogged fuel injectors. Start by using high octane fuel and/or fuel additive to clean injectors. If problem persists fuel injectors may need to be replace.