P0090 on 2021-2023 GMC Terrain (SLE, SLT, Denali) — Fuel Pressure Regulator 1 Control Circuit
1 vehicles · 1 makes
Most Reported On
P0090 is an OBD-II diagnostic trouble code meaning “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). This code is most commonly reported on 2021-2023 GMC Terrain (SLE, SLT, Denali).
Common Causes
Diagnostic Tools
To diagnose P0090, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
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BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
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LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
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Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
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- Oil reset, EPB, BMS, TPMS, injector coding
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FAQ
What does P0090 mean?
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).
What are the most common causes of P0090?
The most common causes of P0090 are: Failed fuel pressure regulator/control valve, Open/shorted wiring or connector, Corroded connector, PCM driver fault. The specific cause varies by vehicle.
How much does it cost to fix P0090?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by P0090?
Au7o has documented P0090 across 1 vehicle models from 1 manufacturers: GMC.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.