How to Fix P1299 Injector High Side Open – Bank 2/Target Idle Not Reached

Introduction

If you’re experiencing the P1299 error code on your vehicle, it means that there is an issue with the injector high side open on bank 2, and the target idle is not being reached. This can cause a variety of problems, including poor fuel economy, rough idling, and even engine damage if left unchecked. In this article, we’ll go over the steps you can take to fix this issue and get your vehicle running smoothly again.

Step 1: Check the Wiring

The first thing you should do when you encounter the P1299 error code is to check the wiring. This is often the cause of the problem, and it’s relatively easy to fix. Start by inspecting the wiring harness for any signs of damage or wear. Look for frayed wires, loose connections, or any other issues that could be causing a short circuit.

If you find any problems with the wiring, you’ll need to repair or replace it. This may involve splicing in a new section of wire, or replacing the entire harness if the damage is extensive. Be sure to use high-quality wiring and connectors to ensure a reliable repair.

Step 2: Check the Injector

If the wiring checks out, the next step is to check the injector itself. Start by removing the injector from the engine and inspecting it for any signs of damage or wear. Look for cracks, leaks, or other issues that could be causing the high side open error.

If you find any problems with the injector, you’ll need to replace it. This is a relatively simple process, but it does require some specialized tools. You’ll need a fuel injector puller, as well as a torque wrench to properly tighten the new injector in place.

Step 3: Check the Fuel Pressure

If the wiring and injector are both in good condition, the next step is to check the fuel pressure. A low fuel pressure can cause the target idle not to be reached, which can trigger the P1299 error code.

To check the fuel pressure, you’ll need a fuel pressure gauge. Connect the gauge to the fuel rail and start the engine. The gauge should read between 30 and 45 psi at idle. If the pressure is too low, you may need to replace the fuel pump or fuel filter.

Step 4: Check the Idle Air Control Valve

If the fuel pressure is within the correct range, the next step is to check the idle air control valve. This valve controls the amount of air that enters the engine at idle, and if it’s not functioning properly, it can cause the target idle not to be reached.

To check the idle air control valve, start by removing it from the engine. Inspect it for any signs of damage or wear, and clean it thoroughly with a carburetor cleaner. If the valve is damaged or worn, you’ll need to replace it.

Conclusion

Fixing the P1299 error code can be a bit of a challenge, but with the right tools and knowledge, it’s definitely doable. By following the steps outlined in this article, you should be able to diagnose and fix the issue, and get your vehicle running smoothly again.

FAQs

1. Can I drive my vehicle with the P1299 error code?

It’s not recommended to drive your vehicle with the P1299 error code, as it can cause damage to your engine if left unchecked. It’s best to diagnose and fix the issue as soon as possible.

2. How much does it cost to fix the P1299 error code?

The cost of fixing the P1299 error code will depend on the cause of the issue. If it’s a simple wiring problem, it may only cost a few hundred dollars to fix. If it’s a more complex issue, such as a faulty injector or fuel pump, it could cost upwards of $1000.

3. Can I fix the P1299 error code myself?

If you have some experience working on cars and the right tools, you may be able to fix the P1299 error code yourself. However, if you’re not confident in your abilities, it’s best to take your vehicle to a professional mechanic.