P2293 on GMC
Fuel Pressure Regulator 2 Performance
P2293 on GMC vehicles indicates fuel pressure regulator 2 performance. Au7o has documented this code across 2 GMC models — most commonly on Sierra 2500HD, Sierra 3500HD. This code means the engine computer has detected that the fuel pressure regulator 2 isn't performing as expected, so the system can't maintain the correct fuel pressure under varying conditions. On many direct-injection and high-pressure systems, regulator 2 controls the high-side fuel pressure, and the computer compares commanded pressure to what the fuel pressure sensor actually reports. When the measured pressure drifts too far from the target, it sets this performance code, which can cause hard starting, rough running, hesitation, reduced power, or stalling. Causes typically include a faulty regulator or high-pressure pump, a fuel delivery restriction, or a pressure sensor problem. Typical repair costs on GMC range from $8,000 to $18,000, depending on the specific model and root cause.
Common Causes of P2293
- •Faulty fuel pressure regulator (regulator 2)
- •Failing high-pressure fuel pump
- •Faulty or out-of-range fuel rail pressure sensor
- •Clogged fuel filter or restricted fuel supply
- •Weak low-pressure (lift) pump feeding the high-pressure system
- •Leaking fuel injector bleeding off pressure
- •Wiring or connector fault to the regulator/pump
- •Air or contamination in the fuel system
P2293 on GMC by Model
GMC Sierra 2500HD(1 issue)
- CP4.2 High-Pressure Fuel Pump Catastrophic Failure2011-2020
The Bosch CP4.2 high-pressure fuel injection pump used on the 2011-2016 LML and 2017-2020 L5P Duramax diesel engines is prone to catastrophic failure that destroys the entire fuel injection system. Unlike its predecessor the CP3, the CP4.2 lacks a roller element and relies solely on fuel for lubrication. When metal fatigue occurs, the pump shatters and sends metal debris throughout the entire high-pressure fuel system — contaminating all six injectors, the fuel rails, return lines, and feed lines. Total repair cost runs $8,000-18,000. A class action lawsuit was filed against GM. The same pump also fails in Ford 6.7 Power Stroke and Ram 6.7 Cummins of the same era.
GMC Sierra 3500HD(1 issue)
- CP4.2 High-Pressure Fuel Pump Catastrophic Failure2011-2020
The Sierra 3500HD Duramax diesel uses the same Bosch CP4.2 high-pressure fuel pump as the 2500HD. The pump is prone to catastrophic failure that destroys the entire fuel injection system (all 6 injectors, fuel rails, return lines). The 3500HD is often used for heavier towing and work applications, which places more sustained load on the high-pressure fuel system and may accelerate CP4.2 wear. Total system replacement costs $10,000-18,000. A CP3 conversion kit (Fleece FPE-CP3K-LML or FPE-CP3K-L5P) is strongly recommended as a preventive upgrade on any high-mileage Sierra 3500HD Duramax.
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View P2293 across all makes →Frequently Asked Questions
What does P2293 mean on GMC?▼
P2293 stands for "Fuel Pressure Regulator 2 Performance." This code means the engine computer has detected that the fuel pressure regulator 2 isn't performing as expected, so the system can't maintain the correct fuel pressure under varying conditions. On many direct-injection and high-pressure systems, regulator 2 controls the high-side fuel pressure, and the computer compares commanded pressure to what the fuel pressure sensor actually reports. When the measured pressure drifts too far from the target, it sets this performance code, which can cause hard starting, rough running, hesitation, reduced power, or stalling. Causes typically include a faulty regulator or high-pressure pump, a fuel delivery restriction, or a pressure sensor problem. On GMC specifically, this code is documented across 2 models.
What causes P2293 on GMC vehicles?▼
Common causes on GMC: Faulty fuel pressure regulator (regulator 2), Failing high-pressure fuel pump, Faulty or out-of-range fuel rail pressure sensor, Clogged fuel filter or restricted fuel supply, Weak low-pressure (lift) pump feeding the high-pressure system. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P2293 on a GMC?▼
Repair costs on GMC range from $8,000 to $18,000, depending on the specific model and root cause.
Which GMC models have P2293 documented?▼
Au7o has documented P2293 on 2 GMC models: Sierra 2500HD, Sierra 3500HD.