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P1239 Nissan Code - Throttle Position Sensor Circuit Range/Performance

Quick Answer

The P1239 diagnostic trouble code (DTC) for Nissan vehicles indicates a problem with the Throttle Position Sensor (TPS) circuit, specifically related to its range or performance. Common causes include Faulty Throttle Position Sensor, Wiring or connector issues in the TPS circuit, Corrosion or contamination affecting TPS signal. 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
P1239 Nissan indicates Throttle Position Sensor Circuit Range/Performance.
Common causes
Common causes include Faulty Throttle Position Sensor, Wiring or connector issues in the TPS circuit, Corrosion or contamination affecting TPS signal.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P1239 Nissan Description

The P1239 diagnostic trouble code (DTC) for Nissan vehicles indicates a problem with the Throttle Position Sensor (TPS) circuit, specifically related to its range or performance. The TPS is a crucial component of the electronic throttle control system, responsible for monitoring the position of the throttle pedal and sending signals to the Engine Control Module (ECM) to adjust the air-fuel mixture for optimal engine performance. When the TPS circuit is outside the expected range or not performing as required, it can lead to various issues that affect the vehicle's drivability and overall performance.

OBDII Code P1239 Nissan - Throttle Position Sensor Circuit Range/Performance
P1239 Nissan Code - Throttle Position Sensor Circuit Range/Performance

Common Causes of P1239 Nissan

  1. Faulty Throttle Position Sensor
  2. Wiring or connector issues in the TPS circuit
  3. Corrosion or contamination affecting TPS signal
  4. ECM software or hardware problems
  5. Mechanical issues with the throttle body

Symptoms of P1239 Nissan

  1. Erratic engine operation
  2. Poor fuel efficiency
  3. Hesitation or lack of response during acceleration
  4. Rough idling
  5. Engine stalling

How to Fix P1239 Nissan

  1. Perform a comprehensive diagnostic scan to confirm the P1239 code and pinpoint the exact cause of the issue.
  2. Inspect the TPS circuit wiring and connectors for any damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Test the Throttle Position Sensor using a multimeter to ensure it is functioning correctly. Replace the TPS if it fails the test.
  4. Clean the throttle body and perform a throttle relearn procedure to recalibrate the TPS and ensure proper operation.
  5. Clear the DTC with a scan tool and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P1239 Nissan

The cost of repairing a Throttle Position Sensor circuit range/performance issue (P1239 code) can vary depending on the exact cause of the problem and the labor rates in your area. Typically, replacing a faulty TPS or repairing wiring/connectors can range from $100 to $300, including parts and labor. Additional costs may apply if other components need to be replaced or if further diagnostics are required. It is recommended to consult with a qualified mechanic or dealership to get an accurate estimate based on your vehicle's make and model.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1239 Nissan Code

1. What are the common symptoms of OBDII code P1239 in a Nissan related to the throttle position sensor circuit?

- Common symptoms include poor acceleration, rough idling, stalling, and a noticeable decrease in fuel efficiency.

2. What are the possible causes of OBDII code P1239 in a Nissan indicating a throttle position sensor circuit range/performance issue?

- Possible causes may include a faulty throttle position sensor, damaged wiring or connectors in the sensor circuit, or issues with the electronic throttle control system.

3. How can a driver diagnose OBDII code P1239 in a Nissan related to the throttle position sensor circuit issue?

- A driver can use a diagnostic scanner to read the code and perform a visual inspection of the throttle position sensor and its wiring for any visible damage or corrosion.

4. What are some repair tips for resolving OBDII code P1239 in a Nissan indicating a throttle position sensor circuit range/performance problem?

- Repair tips may include replacing the throttle position sensor, repairing or replacing damaged wiring or connectors, and clearing the trouble code with a diagnostic scanner.

5. Is it safe to continue driving a Nissan with OBDII code P1239 indicating a throttle position sensor circuit issue?

- It is not recommended to continue driving the vehicle with this code as it can lead to performance issues and potential safety hazards. It is best to address the problem promptly.

6. Can a DIY enthusiast fix OBDII code P1239 in a Nissan related to the throttle position sensor circuit issue?

- Depending on their skill level, a DIY enthusiast may be able to replace the throttle position sensor or repair wiring issues. However, for more complex problems, it is advisable to seek professional help.

7. How much does it typically cost to repair OBDII code P1239 in a Nissan caused by a throttle position sensor circuit range/performance problem?

- The cost of repair can vary depending on the specific issue, but it may range from $100 to $300 for parts and labor if the throttle position sensor needs replacement.

8. Will resetting the ECU clear OBDII code P1239 in a Nissan related to the throttle position sensor circuit issue?

- Resetting the ECU may temporarily clear the trouble code, but if the underlying issue with the throttle position sensor circuit is not addressed, the code is likely to reappear.

9. How long does it typically take to repair OBDII code P1239 in a Nissan caused by a throttle position sensor circuit range/performance problem?

- The repair time can vary based on the extent of the issue and the availability of parts, but it may take anywhere from 1 to 3 hours to complete the repair.

10. Are there any preventive maintenance steps that can help avoid OBDII code P1239 in a Nissan related to the throttle position sensor circuit malfunction?

- Regularly inspecting and cleaning the throttle position sensor, as well as checking the wiring for any signs of wear or damage, can help prevent issues that trigger this trouble code.

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