P2123 Cadillac Code - Accelerator Pedal Position Sensor 1 Circuit High Voltage
Quick Answer
The diagnostic trouble code P2123 for Cadillac vehicles indicates a problem with the Accelerator Pedal Position Sensor 1 Circuit High Voltage. Common causes include Faulty Accelerator Pedal Position Sensor, Damaged wiring or connectors in the sensor circuit, ECM malfunction. 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 Cadillac indicates Accelerator Pedal Position Sensor 1 Circuit High Voltage.
- Common causes
- Common causes include Faulty Accelerator Pedal Position Sensor, Damaged wiring or connectors in the sensor circuit, ECM malfunction.
- 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 Cadillac Description
The diagnostic trouble code P2123 for Cadillac vehicles indicates a problem with the Accelerator Pedal Position Sensor 1 Circuit High Voltage. The Accelerator Pedal Position Sensor (APP) is a crucial component of the vehicle's electronic throttle control system. This sensor is responsible for detecting the position of the accelerator pedal and sending this information to the engine control module (ECM). The ECM then uses this data to adjust the throttle position and regulate the engine's performance accordingly.
Common Causes of P2123 Cadillac
- Faulty Accelerator Pedal Position Sensor
- Damaged wiring or connectors in the sensor circuit
- ECM malfunction
- Corrosion or moisture in the sensor connections
- Electrical issues such as a short circuit or open circuit in the wiring
Symptoms of P2123 Cadillac
- Poor acceleration or throttle response
- Rough idling or stalling
- Reduced engine performance
- Vehicle going into "limp mode"
- Check Engine Light illuminated on the dashboard
How to Fix P2123 Cadillac
- Diagnose the issue using a digital multimeter to test the voltage output of the APP sensor.
- Inspect the wiring harness and connectors for any damage or corrosion.
- Replace the Accelerator Pedal Position Sensor if it is found to be faulty.
- Clear the trouble codes from the ECM and test drive the vehicle to ensure the issue has been resolved.
- If the problem persists, further diagnostics may be needed to pinpoint the exact cause.
Cost to Fix P2123 Cadillac
The typical repair costs for addressing the P2123 code can vary depending on the specific cause of the issue. In general, replacing the Accelerator Pedal Position Sensor can range from $100 to $300, including parts and labor. Additional costs may apply if there are wiring issues or ECM problems that need to be addressed. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's best to check with local providers for a more accurate estimate.
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