How to Fix P0803 Shift/Timing Solenoid High

Introduction

If you’re experiencing trouble with your car’s transmission, specifically the P0803 Shift/Timing Solenoid High error code, you’re not alone. This issue can be frustrating and costly if not addressed promptly. However, with a little bit of knowledge and some DIY skills, you can fix this problem yourself and save money on expensive repairs. In this article, we’ll provide you with step-by-step instructions on how to fix the P0803 Shift/Timing Solenoid High error code.

What is P0803 Shift/Timing Solenoid High?

The P0803 Shift/Timing Solenoid High error code is a common issue that occurs in automatic transmissions. It indicates that there is a problem with the shift/timing solenoid circuit, which controls the shifting of gears in your car’s transmission. When this circuit fails, your car may experience a variety of symptoms, including rough shifting, delayed shifting, or even a complete failure to shift.

Step-by-Step Guide to Fixing P0803 Shift/Timing Solenoid High

Step 1: Diagnose the Problem

Before you can fix the P0803 Shift/Timing Solenoid High error code, you need to diagnose the problem. This can be done using an OBD-II scanner, which can read the error code and provide you with more information about the issue. Once you’ve identified the problem, you can move on to the next step.

Step 2: Replace the Shift/Timing Solenoid

The most common cause of the P0803 Shift/Timing Solenoid High error code is a faulty shift/timing solenoid. To fix this problem, you’ll need to replace the solenoid. This can be done by following these steps:

1. Locate the shift/timing solenoid in your car’s transmission.
2. Remove the electrical connector from the solenoid.
3. Remove the bolts that hold the solenoid in place.
4. Remove the old solenoid and replace it with a new one.
5. Reinstall the bolts and electrical connector.

Step 3: Check the Wiring

If replacing the shift/timing solenoid doesn’t fix the problem, you may need to check the wiring. This can be done by following these steps:

1. Inspect the wiring for any damage or corrosion.
2. Use a multimeter to test the resistance of the wiring.
3. If the wiring is damaged or has high resistance, replace it.

Step 4: Check the Transmission Control Module (TCM)

If the wiring is not the problem, you may need to check the Transmission Control Module (TCM). This can be done by following these steps:

1. Locate the TCM in your car’s engine compartment.
2. Remove the electrical connector from the TCM.
3. Inspect the connector for any damage or corrosion.
4. Use a multimeter to test the resistance of the TCM.
5. If the TCM is damaged or has high resistance, replace it.

Conclusion

Fixing the P0803 Shift/Timing Solenoid High error code may seem daunting, but with the right tools and knowledge, it can be done. By following the steps outlined in this article, you can diagnose and fix the problem yourself, saving you time and money on expensive repairs.

FAQs

1. Can I drive my car with the P0803 Shift/Timing Solenoid High error code?

It’s not recommended to drive your car with the P0803 Shift/Timing Solenoid High error code. This issue can cause damage to your car’s transmission and may result in a complete failure to shift.

2. How much does it cost to fix the P0803 Shift/Timing Solenoid High error code?

The cost of fixing the P0803 Shift/Timing Solenoid High error code can vary depending on the cause of the problem. If it’s a simple fix like replacing the solenoid, it may only cost a few hundred dollars. However, if the problem is more complex, it could cost upwards of $1,000.

3. Can I fix the P0803 Shift/Timing Solenoid High error code myself?

Yes, you can fix the P0803 Shift/Timing Solenoid High error code yourself if you have the right tools and knowledge. However, if you’re not comfortable working on your car’s transmission, it’s best to leave it to a professional mechanic.