P2123 2017 Chevrolet Silverado Code - Accelerator Pedal Position Sensor 1 Circuit High Voltage
Quick Answer
The P2123 diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has detected a high voltage condition in the Accelerator Pedal Position Sensor 1 circuit. Common causes include Faulty Accelerator Pedal Position Sensor: The sensor itself may be malfunctioning or damaged, leading to incorrect voltage readings, Wiring Issues: Damaged or corroded wiring in the sensor circuit can cause high voltage conditions, ECM Malfunction: A failure in the engine control module can lead to erroneous readings and trigger the P2123 code. 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: The sensor itself may be malfunctioning or damaged, leading to incorrect voltage readings, Wiring Issues: Damaged or corroded wiring in the sensor circuit can cause high voltage conditions, ECM Malfunction: A failure in the engine control module can lead to erroneous readings and trigger the P2123 code.
- 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 P2123 2017 Chevrolet Silverado Description
The P2123 diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has detected a high voltage condition in the Accelerator Pedal Position Sensor 1 circuit. This sensor is crucial for the vehicle's throttle control system, as it translates the driver's input on the accelerator pedal into an electronic signal that the ECM uses to adjust the throttle position accordingly.
Common Causes of P2123 2017 Chevrolet Silverado
- Faulty Accelerator Pedal Position Sensor: The sensor itself may be malfunctioning or damaged, leading to incorrect voltage readings.
- Wiring Issues: Damaged or corroded wiring in the sensor circuit can cause high voltage conditions.
- ECM Malfunction: A failure in the engine control module can lead to erroneous readings and trigger the P2123 code.
- Poor Electrical Connections: Loose or corroded connectors can affect the sensor's ability to send accurate signals.
- Mechanical Obstruction: Physical obstructions in the throttle body or accelerator pedal assembly can lead to sensor misreadings.
Symptoms of P2123 2017 Chevrolet Silverado
- Reduced Engine Power: The vehicle may exhibit a noticeable decrease in acceleration and overall power.
- Unresponsive Throttle: The accelerator pedal may not respond as expected, leading to difficulties in controlling speed.
- Check Engine Light: The illumination of the check engine light on the dashboard is a common symptom when this code is triggered.
- Stalling: The engine may stall unexpectedly, especially during acceleration or deceleration.
- Limp Mode Activation: The vehicle may enter a safety mode that restricts engine performance to prevent damage.
How to Fix P2123 2017 Chevrolet Silverado
- Visual Inspection: Start with a thorough visual inspection of the accelerator pedal position sensor, wiring, and connectors for any visible damage or corrosion.
- Test the Sensor: Use a multimeter to check the voltage output of the accelerator pedal position sensor while operating the pedal to ensure it operates within the specified range.
- Repair or Replace Wiring: If any wiring issues are found, repair or replace damaged sections to restore proper electrical connectivity.
- Replace the Sensor: If the sensor is determined to be faulty, replacing it with a new, OEM-quality part is necessary.
- Reprogram or Replace ECM: If the ECM is found to be malfunctioning, it may require reprogramming or replacement to resolve the issue.
Cost to Fix P2123 2017 Chevrolet Silverado
The typical repair costs for addressing the P2123 code can range from $200 to $600, depending on the specific repairs needed. This estimate includes parts such as the accelerator pedal position sensor, which may cost between $50 and $150, and labor costs, which can vary widely. Labor rates at auto repair shops generally range from $80 to $150 per hour. In metropolitan areas or at dealerships, rates may be higher, while independent shops often charge less. It's advisable to check local rates for a more precise estimate, as the total cost will depend on the diagnosis time and the complexity of the repairs required.
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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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