P2122 2017 GMC Sierra Code - Accelerator Pedal Position Sensor 1 Circuit Low Voltage
Quick Answer
The P2122 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the Accelerator Pedal Position Sensor 1 Circuit, specifically a low voltage condition. Common causes include Faulty Accelerator Pedal Position Sensor, Damaged or corroded wiring/connectors in the sensor circuit, Issues with the ECM or related control modules. 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, Damaged or corroded wiring/connectors in the sensor circuit, Issues with the ECM or related control modules.
- 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 P2122 2017 GMC Sierra Description
The P2122 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates a problem with the Accelerator Pedal Position Sensor 1 Circuit, specifically a low voltage condition. The Accelerator Pedal Position Sensor (APPS) is a vital component of the vehicle's electronic throttle control system, responsible for sending the position of the accelerator pedal to the engine control module (ECM). The ECM uses this information to adjust the throttle opening and control the engine's power output accordingly.
Common Causes of P2122 2017 GMC Sierra
- Faulty Accelerator Pedal Position Sensor
- Damaged or corroded wiring/connectors in the sensor circuit
- Issues with the ECM or related control modules
- Electrical interference or short circuits in the sensor circuit
- Environmental factors such as moisture or debris affecting sensor operation
Symptoms of P2122 2017 GMC Sierra
- Lack of response or delayed response when pressing the accelerator pedal
- Poor acceleration and reduced engine performance
- Vehicle going into limp mode
- Check Engine Light illuminated on the dashboard
How to Fix P2122 2017 GMC Sierra
- Begin by diagnosing the specific cause of the low voltage condition, using a scan tool to retrieve the DTC and checking the sensor's voltage readings.
- Inspect the wiring and connectors in the Accelerator Pedal Position Sensor circuit for any damage, corrosion, or loose connections. Repair or replace as necessary.
- Test the Accelerator Pedal Position Sensor itself using a multimeter to ensure it is functioning correctly. Replace the sensor if it fails the test.
- Clear the DTC from the ECM's memory using the scan tool and perform a test drive to verify that the issue has been resolved.
- If the problem persists, further diagnostics may be required to pinpoint any underlying issues with the electronic throttle control system.
Cost to Fix P2122 2017 GMC Sierra
The typical repair costs for addressing a P2122 code on a 2017 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty Accelerator Pedal Position Sensor or repairing damaged wiring/connectors can range from $150 to $300 for parts, with additional labor costs of $100 to $200. However, it's important to note that diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. It's advisable to check with local auto repair shops for a more accurate estimate tailored to your specific situation.
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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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