P2123 2016 Chevrolet Silverado 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 Chevrolet Silverado 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 Chevrolet Silverado 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 Chevrolet Silverado?
- 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 Chevrolet Silverado?
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 Chevrolet Silverado 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 P2123 2016 Chevrolet Silverado Code
1. What does the OBDII code P2123 mean on a 2016 Chevrolet Silverado?
P2123 indicates an issue with the Accelerator Pedal Position (APP) Sensor 1 Circuit, specifically a high voltage condition detected by the powertrain control module (PCM).
2. What are the common symptoms of code P2123 in a 2016 Chevrolet Silverado?
Symptoms include reduced engine power, the "Check Engine" or "Reduced Power" warning light, unresponsive throttle, poor acceleration, or the vehicle entering "limp mode."
3. What causes the P2123 code in a 2016 Chevrolet Silverado?
Common causes include a faulty accelerator pedal position sensor, damaged wiring or connectors in the APP sensor circuit, or a malfunctioning PCM.
4. Can I drive my 2016 Chevrolet Silverado with the P2123 code?
It’s not recommended to continue driving with this code, as the reduced power mode could limit acceleration and create unsafe driving conditions.
5. How do I diagnose the P2123 code on a 2016 Chevrolet Silverado?
Diagnosis involves checking the APP sensor, inspecting the wiring and connectors for damage or corrosion, and testing the circuit for high voltage with a multimeter.
6. How do I fix the P2123 code on a 2016 Chevrolet Silverado?
Repair steps might include replacing the accelerator pedal position sensor, repairing damaged wiring or connectors, or replacing the PCM if it’s determined to be faulty.
7. Does the P2123 code always mean the accelerator pedal position sensor is bad?
No, the issue could also stem from wiring problems, connector issues, or a malfunctioning PCM, so the sensor should be properly tested before replacing it.
8. How much does it cost to fix the P2123 code on a 2016 Chevrolet Silverado?
Repair costs vary, but replacing the APP sensor typically ranges from $100 to $300, including parts and labor. Wiring or PCM repairs may cost more.
9. Can a dirty throttle body cause the P2123 code?
A dirty throttle body is typically unrelated to P2123. The code specifically points to a high voltage issue in the APP Sensor 1 Circuit.
10. Do I need to reprogram the PCM after fixing the P2123 issue?
Reprogramming is usually not required unless the PCM is replaced. After repairs, clearing the code and driving the vehicle can confirm if the issue is resolved.
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