P0090 on GMC
Fuel Pressure Regulator 1 Control Circuit
P0090 on GMC vehicles indicates fuel pressure regulator 1 control circuit. Au7o has documented this code across 1 GMC model — most commonly on Terrain. The PCM detects a general fault in the control circuit for fuel pressure regulator 1 (the electrically controlled regulator/valve that sets rail pressure).
Common Causes of P0090
- •Failed fuel pressure regulator/control valve
- •Open/shorted wiring or connector
- •Corroded connector
- •PCM driver fault
P0090 on GMC by Model
GMC Terrain(1 issue)
- High-Pressure Fuel Pump Failure Causing Engine Stall (Recall)2021-2023
On 1.5L turbo Terrains, a component inside the high-pressure fuel pump can fracture prematurely, generating metallic debris that migrates through the fuel line and blocks the injector inlets, starving the engine of fuel and causing sudden stalling and loss of power while driving - a crash risk. GM recall N222372310 (NHTSA 23V-013) covers the 2022 Terrain; broader inadequate-fuel-flow actions span the 2021-2023 range.
Looking for P0090 on a different make?
View P0090 across all makes →Frequently Asked Questions
What does P0090 mean on GMC?▼
P0090 stands for "Fuel Pressure Regulator 1 Control Circuit." The PCM detects a general fault in the control circuit for fuel pressure regulator 1 (the electrically controlled regulator/valve that sets rail pressure). On GMC specifically, this code is documented across 1 model.
What causes P0090 on GMC vehicles?▼
Common causes on GMC: Failed fuel pressure regulator/control valve, Open/shorted wiring or connector, Corroded connector, PCM driver fault. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0090 on a GMC?▼
Repair costs vary widely depending on the root cause and specific GMC model.
Which GMC models have P0090 documented?▼
Au7o has documented P0090 on 1 GMC model: Terrain.