P2123 Infiniti Code - Accelerator Pedal Position Sensor Circuit Range/Performance
Quick Answer
The Accelerator Pedal Position (APP) sensor is installed on the upper end of the accelerator pedal assembly. 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 Infiniti indicates Accelerator Pedal Position Sensor Circuit Range/Performance.
- 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 Infiniti Description
Accelerator pedal position sensor has two sensors. These sensors are a kind of potentiometers which transform the accelerator pedal position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of the accelerator pedal and feed the voltage signals to the ECM. The ECM judges the current opening angle of the accelerator pedal from these signals and controls the throttle control motor based on these signals.
Idle position of the accelerator pedal is determined by the ECM receiving the signal from the accelerator pedal position sensor. The ECM uses this signal for the engine operation
such as fuel cut.
What are the Possible Causes of the DTC P2123 Infiniti?
- Faulty Accelerator Pedal Position Sensor
- Accelerator Pedal Position Sensor harness is open or shorted
- Accelerator Pedal Position Sensor circuit poor electrical connection
How to Fix the DTC P2123 Infiniti?
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 Infiniti 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 Infiniti code?
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Information for Specific Infiniti Models
- P2123 2003 Infiniti G35 — Accelerator Pedal Position Sensor Circuit Range/Performance
- P2123 2004 Infiniti G35 — Accelerator Pedal Position Sensor Circuit Range/Performance
- P2123 2005 Infiniti G35 — Accelerator Pedal Position Sensor Circuit Range/Performance
- P2123 2006 Infiniti G35 — Accelerator Pedal Position Sensor Circuit Range/Performance
Frequently Asked Questions about P2123 Infiniti Code
1. What does the OBDII code P2123 mean for an Infiniti?
P2123 indicates an issue with the Accelerator Pedal Position (APP) Sensor circuit, specifically that it is out of range or has a performance problem.
2. What are common symptoms of the P2123 code in an Infiniti?
Symptoms may include reduced engine performance, the vehicle entering "limp mode," an illuminated check engine light, and unresponsive or erratic throttle behavior.
3. What causes the P2123 code to appear on an Infiniti?
Common causes include a faulty accelerator pedal position sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module (ECM).
4. Can I drive my Infiniti with the P2123 code?
Driving with this code is not recommended, as it can limit throttle response and potentially lead to unsafe driving conditions.
5. How do I diagnose the P2123 code on an Infiniti?
Start by inspecting the accelerator pedal position sensor, checking for damaged wiring, loose connections, or corrosion. Use a multimeter to test the sensor's voltage and continuity if necessary.
6. How is the P2123 code fixed on an Infiniti?
Repairs may include replacing the accelerator pedal position sensor, repairing or replacing damaged wiring, or reprogramming the ECM if needed.
7. How much does it cost to fix the P2123 code on an Infiniti?
The repair cost can range from $150 to $400, depending on whether the sensor needs replacement or if additional wiring repairs are required.
8. Does the P2123 code require reprogramming the ECM?
In some cases, reprogramming the ECM may be necessary if the issue is related to a software glitch or if a new sensor requires calibration.
9. Can a dirty throttle body trigger the P2123 code on an Infiniti?
While uncommon, a dirty throttle body can indirectly contribute to throttle-related issues, but the code specifically points to the APP sensor circuit.
10. Is the P2123 code unique to Infiniti vehicles?
No, P2123 is a generic OBDII code that applies to many vehicles, but troubleshooting steps and repair procedures may vary depending on the make and model.
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