AutoCodes – GMC – P0192 GMC

P0192 GMC Code - Fuel Rail Pressure Sensor Circuit Low Input

Quick Answer

The Engine Control Module (ECM) uses the Fuel Rail Pressure (FRP) sensor to constantly adjust the high-pressure fuel pump's feed rate so that the ideal pressure is permanently maintained in the high-pressure section (between the high-pressure fuel pump and the injectors) by means of closed-loop control. Common causes include Low or no fuel, Faulty Fuel Rail Pressure (FRP) Sensor, Fuel Rail Pressure harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0192 GMC indicates Fuel Rail Pressure Sensor Circuit Low Input.
Common causes: Common causes include Low or no fuel, Faulty Fuel Rail Pressure (FRP) Sensor, Fuel Rail Pressure harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 9,155

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on May 30, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P0192 GMC Description

The Engine Control Module (ECM) uses the Fuel Rail Pressure (FRP) sensor to constantly adjust the high-pressure fuel pump's feed rate so that the ideal pressure is permanently maintained in the high-pressure section (between the high-pressure fuel pump and the injectors) by means of closed-loop control. The fuel rail pressure sensor transmits fuel pressure and temperature information via serial data to the ECM. When the fuel pressure is high, the signal voltage is high. When the fuel pressure is low, the signal voltage is low. The ECM controls the fuel pressure regulator, which regulates high-pressure fuel that goes to the fuel injector rails and the injectors. The Diagnostic Trouble Code (DTC) will be set if the Fuel Rail Pressure Sensor 1 is greater than a predefined threshold for greater than 2.6 s.

OBDII Code P0192 GMC - Fuel Rail Pressure Sensor Circuit Low Input - AutoCodes.com — P0192 GMC Code - Fuel Rail Pressure Sensor Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P0192 GMC?

Low or no fuel
Faulty Fuel Rail Pressure (FRP) Sensor
Fuel Rail Pressure harness is open or shorted
Fuel Rail Pressure circuit poor electrical connection
Faulty Fuel Pump

How to Fix the DTC P0192 GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0192 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Information for Specific GMC Models

P0192 2014 GMC Sierra — Fuel Rail Pressure Sensor Circuit Low Input
P0192 2015 GMC Sierra — Fuel Rail Pressure Sensor Circuit Low Input
P0192 2016 GMC Sierra — Fuel Rail Pressure Sensor Circuit Low Input
P0192 2017 GMC Sierra — Fuel Rail Pressure Sensor Circuit Low Input
P0192 2018 GMC Sierra — Fuel Rail Pressure Sensor Circuit Low Input

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0192 GMC Code

1. What does the OBDII code P0192 mean on a GMC vehicle?

P0192 indicates that the Powertrain Control Module (PCM) has detected a low voltage input from the fuel rail pressure sensor, which monitors fuel pressure in the rail.

2. What are the common symptoms of a P0192 code on a GMC?

Symptoms may include difficulty starting, rough idling, reduced engine performance, stalling, poor fuel economy, and an illuminated Check Engine Light.

3. What causes the P0192 code to appear on a GMC vehicle?

Common causes include a faulty fuel rail pressure sensor, damaged wiring or connectors, a failing fuel pump, or a malfunctioning PCM.

4. Can I drive my GMC with a P0192 code?

Driving with a P0192 code is not recommended as it can lead to poor performance or engine stalling, which may cause unsafe driving conditions.

5. How do I diagnose a P0192 code on a GMC?

Start by checking the wiring and connectors for damage or corrosion, test the fuel rail pressure sensor for proper operation, and use a diagnostic scan tool to monitor fuel pressure readings.

6. How do I fix the P0192 code on a GMC vehicle?

Repairs may include replacing the fuel rail pressure sensor, repairing damaged wiring, cleaning corroded connectors, or replacing the fuel pump if it's malfunctioning.

7. Can a clogged fuel filter cause the P0192 code?

While not a direct cause, a clogged fuel filter can reduce fuel flow and pressure, potentially triggering a related issue that could lead to a P0192 code.

8. Is a P0192 code expensive to repair on a GMC?

Repair costs vary depending on the root cause, but replacing the fuel rail pressure sensor typically costs between $150 and $300, including parts and labor.

9. What tools are needed to troubleshoot a P0192 code?

Basic tools include a digital multimeter to test electrical connections, a diagnostic scan tool to read live data, and possibly a fuel pressure gauge to verify pressure levels.

10. Can a bad PCM cause a P0192 code on a GMC?

While rare, a malfunctioning PCM can misinterpret sensor signals or provide incorrect voltage, potentially causing the P0192 code. This should be checked after ruling out simpler causes.