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P1229 2007 Nissan Maxima Code - Sensor Power Supply Circuit Shorted

Quick Answer

The P1229 diagnostic trouble code (DTC) for a 2007 Nissan Maxima indicates a sensor power supply circuit shorted. Common causes include Wiring harness damage or corrosion, Faulty sensor power supply relay, 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
P1229 2007 Nissan Maxima indicates Sensor Power Supply Circuit Shorted.
Common causes
Common causes include Wiring harness damage or corrosion, Faulty sensor power supply relay, 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P1229 2007 Nissan Maxima Description

The P1229 diagnostic trouble code (DTC) for a 2007 Nissan Maxima indicates a sensor power supply circuit shorted. This code is typically related to an issue with the sensor power supply circuit, which is responsible for providing power to various sensors within the vehicle's engine management system. When this circuit becomes shorted, it can disrupt the communication between the sensors and the engine control module (ECM), leading to a range of performance issues.

OBDII Code P1229 2007 Nissan Maxima - Sensor Power Supply Circuit Shorted
P1229 2007 Nissan Maxima Code - Sensor Power Supply Circuit Shorted

Common Causes of P1229 2007 Nissan Maxima

  1. Wiring harness damage or corrosion
  2. Faulty sensor power supply relay
  3. ECM malfunction
  4. Shorted sensor power supply circuit
  5. Water intrusion into sensor connectors

Symptoms of P1229 2007 Nissan Maxima

  1. Poor fuel economy
  2. Rough idling
  3. Hesitation or stalling
  4. Engine misfires

How to Fix P1229 2007 Nissan Maxima

  1. Begin by conducting a visual inspection of the wiring harness and sensor connectors to check for any signs of damage, corrosion, or water intrusion.
  2. Test the sensor power supply relay to determine if it is functioning correctly. Replace the relay if necessary.
  3. Use a multimeter to test the sensor power supply circuit for shorts or continuity issues. Repair or replace any damaged wiring as needed.
  4. Clear the DTC from the ECM memory using a diagnostic scan tool and perform a road test to verify that the issue has been resolved.
  5. If the problem persists, further diagnostic testing may be required to pinpoint the exact cause of the sensor power supply circuit shorted.

Cost to Fix P1229 2007 Nissan Maxima

The typical repair costs for addressing a sensor power supply circuit shorted on a 2007 Nissan Maxima can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. Overall, the total repair cost for this issue may fall within the range of $150 to $500. It is important to note that these estimates are approximate and actual costs may vary based on factors such as location, labor rates, and the availability of parts. It is recommended to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate based on the specific circumstances of the vehicle.

What does this mean?

Tech Notes for P1229 2007 Nissan Maxima

Start by inspecting the connections of the harness to the body grounds.

You can try to clean the throttle body first before replacing anything. After clean or replacing the throttle body you will have to do an Idle Air Relearn and Throttle Valve Closed Position Learning



Idle Air Relearn



Throttle Valve Closed Position Learning

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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 P1229 2007 Nissan Maxima Code

1. What are the common symptoms of OBDII code P1229 in a 2007 Nissan Maxima?

The common symptoms include engine stalling, lack of power, rough idling, and the Check Engine light illuminating on the dashboard.

2. What does the OBDII code P1229 in a 2007 Nissan Maxima mean?

The code indicates a fault in the Sensor Power Supply Circuit, specifically a short circuit.

3. What are the possible causes of OBDII code P1229 in a 2007 Nissan Maxima?

Possible causes include a short circuit in the sensor power supply circuit, damaged wiring or connectors, or a malfunctioning sensor.

4. How can I diagnose OBDII code P1229 in a 2007 Nissan Maxima?

Diagnosis involves using an OBDII scanner to retrieve the code, inspecting the wiring and connectors for damage, and testing the sensor's operation.

5. Can I still drive my 2007 Nissan Maxima with OBDII code P1229?

It is not recommended to drive the vehicle with this code present, as it can lead to further damage or unsafe driving conditions.

6. How can I repair OBDII code P1229 in a 2007 Nissan Maxima?

Repair involves locating and fixing the short circuit in the sensor power supply circuit, repairing or replacing damaged wiring or connectors, and replacing a faulty sensor if necessary.

7. Is it safe to reset the Check Engine light after fixing OBDII code P1229 in a 2007 Nissan Maxima?

Yes, once the issue is resolved, you can safely reset the Check Engine light using an OBDII scanner.

8. Can a DIY enthusiast fix OBDII code P1229 in a 2007 Nissan Maxima?

Depending on your experience and tools available, you may be able to fix the issue yourself by following repair guides or seeking help from online forums.

9. How much does it cost to repair OBDII code P1229 in a 2007 Nissan Maxima at a mechanic?

The cost can vary depending on the exact cause of the code, but it typically ranges from $100 to $300 for parts and labor.

10. Will fixing OBDII code P1229 improve the performance of my 2007 Nissan Maxima?

Fixing the code should restore proper operation of the sensor and improve the performance and drivability of the vehicle.

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