P2122 2017 GMC Sierra Code - Accelerator Pedal Position Sensor 1 Circuit Low Voltage
Quick Answer
The Accelerator Pedal Assembly contains 2 Accelerator Pedal Position (APP) sensors. Common causes include Faulty Accelerator Pedal Position Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position Sensor circuit poor electrical connection. 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
- P2122 2017 GMC Sierra indicates Accelerator Pedal Position Sensor 1 Circuit Low Voltage.
- Common causes
- Common causes include Faulty Accelerator Pedal Position Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position Sensor circuit poor electrical connection.
- 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.
Code P2122 2017 GMC Sierra Description
Both the APP sensors 1 and 2 signal percentages increase as the pedal is depressed, from approximately 0 percent at rest to above 95 percent when fully depressed.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the APP sensor 1 voltage is less than 0.46 V for less than 1 s.
What are the Possible Causes of the DTC P2122 2017 GMC Sierra?
- Faulty Accelerator Pedal Position Sensor
- Accelerator Pedal Position Sensor harness is open or shorted
- Accelerator Pedal Position Sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P2122 2017 GMC Sierra?
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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2122 2017 GMC Sierra 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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Frequently Asked Questions about P2122 2017 GMC Sierra Code
What does the OBDII code P2122 mean for a 2017 GMC Sierra?
P2122 indicates a low voltage condition in the Accelerator Pedal Position Sensor 1 circuit, which monitors the pedal's position to control throttle input.
What are common symptoms of the P2122 code in a 2017 GMC Sierra?
Symptoms may include reduced engine power, poor throttle response, the vehicle entering "limp mode," and the check engine light turning on.
What can cause the P2122 code on a 2017 GMC Sierra?
Common causes include a faulty accelerator pedal position sensor, damaged wiring or connectors in the sensor circuit, or issues with the vehicle’s PCM.
Can I drive my 2017 GMC Sierra with the P2122 code?
Driving with this code is not recommended as it may cause poor throttle response and reduced power, potentially leading to unsafe driving conditions.
How is the P2122 code diagnosed on a 2017 GMC Sierra?
A mechanic will typically use a scan tool to confirm the code, inspect the accelerator pedal position sensor and related wiring, and test for voltage and continuity in the circuit.
How do I fix the P2122 code on my 2017 GMC Sierra?
Repairs may include replacing the accelerator pedal position sensor, repairing or replacing damaged wiring or connectors, or reprogramming the PCM if necessary.
How much does it cost to repair the P2122 code on a 2017 GMC Sierra?
Costs vary depending on the issue but typically range from $100 to $300 for parts and labor, with the accelerator pedal sensor being the most common replacement.
Can a dirty throttle body cause the P2122 code in a 2017 GMC Sierra?
A dirty throttle body is unlikely to directly cause this code, but it can contribute to poor throttle response, which might be mistaken for related issues.
What tools are commonly used to address the P2122 code on a 2017 GMC Sierra?
Tools include an OBDII scan tool, multimeter for testing voltage and continuity, and basic hand tools for repairing or replacing components.
Does the P2122 code require PCM reprogramming on a 2017 GMC Sierra?
PCM reprogramming is not always required but may be necessary if the PCM has corrupted software or fails to properly interpret accelerator pedal input.
Discuss the causes and fixes for P2122 2017 GMC Sierra OBDII Code
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