AutoCodes – Generic – P1229

P1229 Code - Sensor Power Supply Circuit Shorted

Quick Answer

The Engine Control Module (ECM) detects the voltage of the power source for the sensor is excessively low or high. Common causes include Check harness body ground, Faulty Accelerator Pedal Position (APP) sensor, Faulty Power Steering Pressure (PSP) sensor. 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 indicates Sensor Power Supply Circuit Shorted.
Common causes
Common causes include Check harness body ground, Faulty Accelerator Pedal Position (APP) sensor, Faulty Power Steering Pressure (PSP) sensor.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 38,537
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Nov 05, 2022
💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1229 Description

The Engine Control Module (ECM) detects the voltage of the power source for the sensor is excessively low or high. The ECM stops the electric throttle control actuator control, and the throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring. The Diagnostic Trouble Code (DTC) will be set when the ECM detects the voltage of the power source for the sensor is excessively low or high.
OBDII Code P1229 - Sensor Power Supply Circuit Shorted - AutoCodes.com
P1229 Code - Sensor Power Supply Circuit Shorted

What are the Possible Causes of the DTC P1229?

  • Check harness body ground
  • Faulty Accelerator Pedal Position (APP) sensor
  • Faulty Power Steering Pressure (PSP) sensor
  • Faulty Refrigerant Pressure sensor
  • Faulty EVAP Control System Pressure sensor

How to Fix the DTC P1229?

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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1229 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 P1229 code?

Need more information on how to fix the P1229 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1229 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

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 Code

1. What are the common symptoms of OBDII code P1229 (Sensor Power Supply Circuit Shorted)?

- Common symptoms include engine stalling, rough idling, poor acceleration, and the Check Engine light illuminating.

2. What are the possible causes of OBDII code P1229?

- The code P1229 can be caused by a short circuit in the sensor power supply circuit, faulty wiring, a malfunctioning sensor, or a problem with the engine control module (ECM).

3. How can I diagnose OBDII code P1229?

- Diagnosing code P1229 typically involves using a scan tool to read the fault codes, checking the sensor power supply circuit for shorts, inspecting wiring for damage, and testing the sensor for proper function.

4. Can I drive my vehicle with OBDII code P1229?

- It is not recommended to drive your vehicle with code P1229 as it can lead to further damage to the engine or other components. It is best to address the issue promptly.

5. How can I repair OBDII code P1229?

- Repairing code P1229 involves fixing any short circuits in the sensor power supply circuit, replacing faulty wiring or sensors, and resetting the fault codes using a scan tool.

6. Are there any DIY tips for addressing OBDII code P1229?

- DIY tips for addressing code P1229 include checking for loose or damaged wiring, ensuring all connections are secure, and following the manufacturer's diagnostic procedures.

7. Can a bad sensor cause OBDII code P1229?

- Yes, a malfunctioning sensor can cause code P1229 as it may not be receiving the proper power supply due to a short circuit or wiring issue.

8. How much does it cost to repair OBDII code P1229?

- The cost of repairing code P1229 can vary depending on the underlying cause, but it may range from $100 to $500 or more, including parts and labor.

9. Will resetting the fault codes make OBDII code P1229 go away permanently?

- Resetting the fault codes may temporarily clear the Check Engine light, but if the underlying issue causing code P1229 is not addressed, the code is likely to reappear.

10. Can a mechanic help me diagnose and repair OBDII code P1229?

- Yes, a qualified mechanic can assist in diagnosing and repairing code P1229 by using specialized tools and expertise to pinpoint the exact cause and perform necessary repairs.

Discuss the causes and fixes for P1229 OBDII Code

  • Hello! Forgive in that nùmero of pin of the computer it must enter this voltage. It urges please, thank you regards. of mexico

AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play