P2123 2017 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 2017 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 2017 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 2017 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 2017 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 2017 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 2017 Chevrolet Silverado Code
1. What does the OBDII code P2123 mean on a 2017 Chevrolet Silverado?
P2123 indicates a high voltage issue in the Accelerator Pedal Position (APP) Sensor 1 circuit, which monitors the position of the accelerator pedal.
2. What are the common symptoms of code P2123 in a 2017 Chevrolet Silverado?
Symptoms may include poor throttle response, reduced engine power mode (limp mode), the check engine light turning on, and difficulty accelerating.
3. What causes the P2123 code in a 2017 Chevrolet Silverado?
Common causes include a faulty APP sensor, damaged wiring or connectors in the APP sensor circuit, or issues with the vehicle’s powertrain control module (PCM).
4. Can I drive my 2017 Chevrolet Silverado with the P2123 code?
It’s not recommended, as the vehicle may enter limp mode or experience reduced throttle response, which could compromise safety.
5. How do I fix the P2123 code on my 2017 Chevrolet Silverado?
Inspect and repair or replace the APP sensor, check for damaged wiring or connectors, and clear the code using a scan tool. If the issue persists, the PCM may need to be inspected.
6. How much does it cost to repair a P2123 code on a 2017 Chevrolet Silverado?
Repair costs can vary. Replacing the APP sensor may cost $100–$300, while wiring repairs or PCM replacement could increase costs significantly.
7. What tools are needed to diagnose the P2123 code on a 2017 Chevrolet Silverado?
A scan tool or OBDII scanner, multimeter, and possibly a wiring diagram for the APP sensor circuit are typically required.
8. Can a dirty throttle body cause the P2123 code on a 2017 Chevrolet Silverado?
Unlikely. P2123 specifically relates to the APP sensor circuit, but other related issues (e.g., throttle position sensor problems) may arise from a dirty throttle body.
9. Does the P2123 code mean the accelerator pedal needs to be replaced?
Not always. While the APP sensor may fail, the issue could also stem from wiring, connectors, or the PCM, so proper diagnosis is essential.
10. Will clearing the P2123 code fix the problem on a 2017 Chevrolet Silverado?
Clearing the code will turn off the check engine light temporarily, but the issue will likely return unless the underlying problem is resolved.
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