P0175 on GMC
System Too Rich (Bank 2)
P0175 on GMC vehicles indicates system too rich (bank 2). Au7o has documented this code across 1 GMC model — most commonly on Jimmy. P0175 is a generic OBD-II code meaning the engine computer detected that the air-fuel mixture on bank 2 is too rich, with too much fuel relative to air. The computer has had to remove fuel (negative fuel trim) to try to correct it but has reached its adjustment limit. Bank 2 is the cylinder bank that does not contain cylinder #1. A persistently rich mixture wastes fuel, causes rough running, and can overheat and damage the catalytic converter over time. Typical repair costs on GMC range from $80 to $250, depending on the specific model and root cause.
Common Causes of P0175
- •Dirty or faulty mass air flow (MAF) sensor
- •Leaking or stuck-open fuel injector
- •Excessive fuel pressure / faulty fuel pressure regulator
- •Faulty or contaminated oxygen sensor
- •Engine vacuum leak or false air reading
- •Dirty/clogged air filter or restricted intake
- •Leaking fuel injector O-rings or fuel saturation
- •Faulty coolant temperature sensor skewing fuel trims
P0175 on GMC by Model
GMC Jimmy(1 issue)
- Fuel Pressure Regulator Diaphragm Leak1996-2001
The fuel pressure regulator diaphragm ruptures, allowing raw fuel to be drawn into the intake manifold through the vacuum line. Causes rich running, hard hot starts, and fuel smell. Can flood the engine with fuel.
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View P0175 across all makes →Frequently Asked Questions
What does P0175 mean on GMC?▼
P0175 stands for "System Too Rich (Bank 2)." P0175 is a generic OBD-II code meaning the engine computer detected that the air-fuel mixture on bank 2 is too rich, with too much fuel relative to air. The computer has had to remove fuel (negative fuel trim) to try to correct it but has reached its adjustment limit. Bank 2 is the cylinder bank that does not contain cylinder #1. A persistently rich mixture wastes fuel, causes rough running, and can overheat and damage the catalytic converter over time. On GMC specifically, this code is documented across 1 model.
What causes P0175 on GMC vehicles?▼
Common causes on GMC: Dirty or faulty mass air flow (MAF) sensor, Leaking or stuck-open fuel injector, Excessive fuel pressure / faulty fuel pressure regulator, Faulty or contaminated oxygen sensor, Engine vacuum leak or false air reading. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0175 on a GMC?▼
Repair costs on GMC range from $80 to $250, depending on the specific model and root cause.
Which GMC models have P0175 documented?▼
Au7o has documented P0175 on 1 GMC model: Jimmy.