As a car expert, I understand how frustrating it can be when your vehicle is not functioning properly. One common issue that many car owners face is the P1394 Glow Plug Circuit High Side Low Input error. This error can cause your vehicle to run poorly and even prevent it from starting. In this article, I will provide you with a step-by-step guide on how to fix this issue and get your car running smoothly again.
What is the P1394 Glow Plug Circuit High Side Low Input Error?
The P1394 Glow Plug Circuit High Side Low Input error is a diagnostic trouble code that indicates a problem with the glow plug circuit in your vehicle. Glow plugs are used to heat the air in the combustion chamber of a diesel engine to help it start in cold weather. When the glow plug circuit is not functioning properly, it can cause your vehicle to run poorly or not start at all.
Step-by-Step Guide to Fixing the P1394 Glow Plug Circuit High Side Low Input Error
Step 1: Check the Glow Plug Relay
The first step in fixing the P1394 Glow Plug Circuit High Side Low Input error is to check the glow plug relay. The relay is responsible for sending power to the glow plugs when you turn the key in the ignition. If the relay is faulty, it can cause the glow plugs to not receive power, which can result in the error code.
To check the relay, locate it in your vehicle’s fuse box. You can find the location of the fuse box in your owner’s manual. Once you have located the relay, remove it from the fuse box and inspect it for any signs of damage or corrosion. If the relay looks damaged, replace it with a new one.
Step 2: Check the Glow Plugs
If the relay is not the issue, the next step is to check the glow plugs themselves. To do this, you will need a multimeter. Set the multimeter to the ohms setting and touch the positive and negative leads to the glow plug terminals. If the multimeter reads a resistance of less than 1 ohm, the glow plug is functioning properly. If the multimeter reads a resistance of more than 1 ohm, the glow plug is faulty and needs to be replaced.
Step 3: Check the Wiring
If the glow plugs are not the issue, the next step is to check the wiring. Check the wiring for any signs of damage or corrosion. If you find any damage, repair or replace the wiring as needed.
Step 4: Check the Glow Plug Control Module
If the wiring is not the issue, the next step is to check the glow plug control module. The control module is responsible for sending power to the glow plugs. If the control module is faulty, it can cause the glow plugs to not receive power, which can result in the error code.
To check the control module, locate it in your vehicle’s engine compartment. You can find the location of the control module in your owner’s manual. Once you have located the control module, inspect it for any signs of damage or corrosion. If the control module looks damaged, replace it with a new one.
Step 5: Clear the Error Code
Once you have fixed the issue causing the P1394 Glow Plug Circuit High Side Low Input error, you will need to clear the error code. To do this, you will need an OBD-II scanner. Connect the scanner to your vehicle’s OBD-II port and follow the instructions to clear the error code.
Conclusion
Fixing the P1394 Glow Plug Circuit High Side Low Input error can be a daunting task, but with the right tools and knowledge, it can be done. By following the step-by-step guide outlined in this article, you can fix the issue and get your car running smoothly again.
FAQs
1. Can I still drive my car with the P1394 Glow Plug Circuit High Side Low Input error?
It is not recommended to drive your car with the P1394 Glow Plug Circuit High Side Low Input error. This error can cause your vehicle to run poorly or not start at all, which can be dangerous if you are on the road.
2. How much does it cost to fix the P1394 Glow Plug Circuit High Side Low Input error?
The cost to fix the P1394 Glow Plug Circuit High Side Low Input error can vary depending on the cause of the issue. If the issue is with the relay or glow plugs, the cost can be relatively low. If the issue is with the control module, the cost can be higher.
3. How can I prevent the P1394 Glow Plug Circuit High Side Low Input error from happening again?
To prevent the P1394 Glow Plug Circuit High Side Low Input error from happening again, it is important to maintain your vehicle’s glow plug system. This includes regularly checking the glow plugs, relay, wiring, and control module for any signs of damage or wear. It is also important to follow your vehicle’s maintenance schedule and keep up with regular oil changes and tune-ups.
