Question 1

What does P1174 mean?

Accepted Answer

P1174 - Fuel Trim Cylinder Balance (Bank 1). GM-specific: Individual cylinder fuel trim is out of range on bank 1. One cylinder is running differently from the others.

Question 2

What are the symptoms of P1174?

Accepted Answer

Check engine light, Rough idle, Possible misfire

Question 3

What causes P1174?

Accepted Answer

Leaking fuel injector, Vacuum leak at one cylinder, Intake valve carbon buildup (GDI), Low compression one cylinder

Question 4

How much does it cost to fix P1174?

Accepted Answer

Typical repair cost: $50-$800. GM uses individual cylinder fuel trim monitoring. This code narrows the problem to a specific bank. Check for injector balance test results to identify the specific cylinder.

P1174 — Fuel Trim Cylinder Balance (Bank 1)

Don't guess — diagnose P1174 the right way

Common symptoms of P1174

Common causes of P1174

Repair cost & difficulty

Vehicles commonly affected

Related trouble codes