P2123 2016 GMC Sierra Code - Accelerator Pedal Position Sensor 1 Circuit High 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
- P2123 2016 GMC Sierra indicates Accelerator Pedal Position Sensor 1 Circuit High 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 P2123 2016 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 greater than 4.75 V for less than 1 s.
What are the Possible Causes of the DTC P2123 2016 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 P2123 2016 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 P2123 2016 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.
Need more information about the P2123 2016 GMC Sierra code?
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Frequently Asked Questions about P2123 2016 GMC Sierra Code
1. What are the common symptoms of OBDII code P2123 in a 2016 GMC Sierra?
When the Accelerator Pedal Position Sensor 1 Circuit registers high voltage, symptoms may include reduced engine power, unresponsive acceleration, and an illuminated Check Engine light.
2. What are the possible causes of OBDII code P2123 in a 2016 GMC Sierra?
Potential causes of P2123 include a faulty accelerator pedal position sensor, wiring issues, a poor electrical connection, or a problem with the engine control module.
3. How can I diagnose the issue causing OBDII code P2123 in my 2016 GMC Sierra?
To diagnose P2123, you can use an OBDII scanner to retrieve the trouble code, visually inspect the accelerator pedal sensor and related wiring, and perform a voltage test on the sensor.
4. Can I continue driving my 2016 GMC Sierra with OBDII code P2123 present?
It is not recommended to drive with code P2123 active, as it can lead to unsafe driving conditions and potential damage to the vehicle. Get the issue diagnosed and repaired promptly.
5. What are some repair tips for fixing OBDII code P2123 in a 2016 GMC Sierra?
Repair tips include checking and cleaning electrical connections, replacing the accelerator pedal position sensor if faulty, repairing damaged wiring, and resetting the fault code after repairs.
6. How much does it typically cost to repair OBDII code P2123 in a 2016 GMC Sierra?
The cost of repairing P2123 can vary depending on the cause of the issue, labor rates, and parts needed. It's advisable to consult a mechanic or dealership for an accurate estimate.
7. Can a DIY enthusiast fix OBDII code P2123 in a 2016 GMC Sierra?
While some DIY enthusiasts may be able to address simple causes of P2123, such as checking connections or replacing the sensor, complex issues may require professional diagnosis and repair.
8. Will disconnecting the battery reset OBDII code P2123 in a 2016 GMC Sierra?
Disconnecting the battery may temporarily clear the fault code, but if the underlying issue causing P2123 is not fixed, the code will likely reappear after driving the vehicle.
9. How urgent is it to address OBDII code P2123 in a 2016 GMC Sierra?
It is essential to address P2123 promptly to prevent further damage to the vehicle, ensure safe driving conditions, and avoid potential engine performance issues associated with the fault code.
10. Is it possible for OBDII code P2123 in a 2016 GMC Sierra to return after being repaired?
If the root cause of P2123 is not properly addressed, the code can reappear. Ensure the repair is done correctly, and all related components are thoroughly inspected to prevent code recurrence.
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