Dealing with the P1326 glow relay stuck on Kia Optima can make you feel intimidated. Unlike some error codes, the P1326 means your engine is at risk of complete failure. Fortunately, this issue is rare in well-maintained vehicles.
But what if your Kia Optima glow relay sticks to the “on” position, and you don’t know how to fix it?
This problem may occur due to several issues with your vehicle. Identifying the cause is the first step to troubleshooting the problem and keeping your Kia Optima in its prime shape. You’ll also need to act swiftly to avoid costly repairs or replacements.
Herein, I’ll discuss the Kia P1326 glow relay stuck on, its symptoms, potential causes, and solutions.
Question: What Does the Kia P1326 Glow Relay Stuck On Mean?
The P1326 glow plug sticking in the “on” position is a common issue in diesel-engine Kia Optima. The code indicates your Kia has a problematic glow plug relay. This device heats the engine cylinders to ignite the car in cold weather.
If the glow plug relays are defective, the engine might be difficult to start. The vehicle may also experience several other performance problems.
On the other hand, the P1326 code on Kia or Hyundai vehicles is a manufacturer-specific code related to the Knock Sensor Detection System (KSDS). When the KSDS detects abnormal engine vibrations, it signals the Engine Control Module (ECM) to activate this error code.
The KSDS and the ECM work in tandem to prevent excessive vibrations that might wear out the engine. It’s worth noting that the error code may occur due to a software error in your Kia’s KSDS.
When fixing this Kia Optima code, it’s necessary to determine the exact cause. Let’s look at the possible causes of the glow relay stuck on Kia Optima.
Answer: Causes and Expert Fixes
If your diesel-engine Kia Optima has the P1326 code, the primary suspect is the glow relay. However, diagnosing and fixing issues causing the glow relay to fail is also important.
Before repairing or replacing parts, use an OBD-II scanner to check the error codes in your Kia. The diagnostic tool will display the P1326, among other error codes. You can use the tool to read and clear all the error codes.
If deleting the error codes doesn’t resolve the problem, you’ll still notice signs like cold-starting difficulties, check engine light flashing, and power loss. In this case, you’ll need to determine and fix the root problem.
Here are the possible causes of the glow relay sticking in the “on” position.
Malfunctioning Glow Plug Relay
The glow plug relay is a crucial device of your Kia Optima’s ignition system. It ensures the glow plugs heat as required to ensure the diesel engine starts properly.
A malfunctioning glow relay will trigger the P1326 error code, preventing the engine from starting correctly. You may also notice increased emissions due to the preheating process of the diesel engine.
If the glow relay is to blame, replacing it can resolve the P1326 glow relay stuck on Kia Optima. Use these steps to replace the defective glow relay:
- Park your Kia Optima and turn off the engine.
- Open the hood and disconnect the negative and positive battery terminals.
- Locate the glow relay near the fuse box.
- Loosen the bolts to remove the relay from its place and disconnect the wiring.
- Inspect the old relay for defects.
- Install a new relay and secure the connections if the old relay looks damaged.
- Reconnect the battery terminals.
- Start the engine to see if you’ve fixed the problem. If replacing the relay doesn’t help, consider the next fix.
Defective Glow Plugs
The glow plug heats the air/fuel mixture in the combustion chamber of diesel engines. If the glow plug is defective, it doesn’t supply the power to keep the relay working. This issue may trigger the P1326 error code and the relay sticking in the “on” position.
Besides, your Kia may experience other issues like increased emissions, inefficient combustion, and driving issues. The failing glow plug may cause severe engine damage if not fixed promptly.
The best way to resolve this problem is to replace the damaged glow plug. Disconnect the battery and locate the glow plugs on the engine’s cylinders. Then, test each plug using a multimeter to see if they supply voltage as required.
If you find faulty glow plugs, remove them and install new plugs. Reconnect the battery and start your engine. If faulty glow plugs are the cause, replacing them should fix the problem.
Faulty Engine Temperature Sensor
The engine temperature sensor provides a signal based on the coolant’s temperature. It sends this signal to the ECU to ensure activities like ignition timing and fuel injection run smoothly. In cold weather, the ECU communicates with the glow relay to ensure proper heating of the glow plugs.
If the engine temperature sensor is defective, it may disrupt the signal transmission from the ECU to the relay. As a result, your Kia Optima glow relay may remain stuck in the “on” position. Repairing or replacing the engine temperature sensor can fix this issue.
The engine temperature sensor is near the glow relay. You can check and fix the sensor’s wiring and connections if necessary. Then, test the sensor using your multimeter and replace it if it is faulty.
Electrical Shorts
The wiring in your Kia Optima can wear out, get frayed, and increase the chances of electrical shorts. When these wires touch each other, they may cause an overcurrent and damage the glow plugs.
Typically, the glow plug’s operating temperature ranges between 1562 to 2192°F. The plugs may overheat and fail if the current flow exceeds this range. As mentioned, defective glow plugs will result in the P1326 glow relay stuck on Kia Optima.
You can fix this issue by inspecting the wiring from the power source to the relay plugs. Use electrical tape to cover the frayed or worn parts. Alternatively, replace the wires to ensure they perform efficiently.
Fuel System Failure
Issues with the injection pump, fuel filter, and fuel lines can impact the glow relays and plugs. The engine may overheat as it overworks to deliver fuel in the combustion chamber. All these issues can affect the functioning of the glow plug and trigger the P1326 error code.
Fuel system failure may cause the engine to emit white smoke as it tries to warm up.
It’s advisable to fix these issues on time to prevent the engine from premature wear and damage. You can clean or replace the injection pump and fuel filter to ensure efficient fuel flow. If you have clogged fuel lines, use compressed air or a fuel system cleaner to clear the clogs.
Answer: Symptoms of P1326 Glow Relay Stuck On
The following symptoms may manifest if you have a glow relay stuck on Kia Optima.
- Cold-starting difficulties
- Glow plug dash light flashing
- Rough idling or hesitation after starting the engine
- White smoke as the vehicle warms up
- Inefficient combustion
- Power loss
Answer: How to Prevent the Glow Relay Stuck On Kia Optima
- Inspect the glow relay and plugs regularly for signs of corrosion.
- Ensure you have a healthy battery.
- Examine the wiring to ensure they’re not worn or frayed.
- Keep the fuel system clean.
- Install high-quality glow plugs.
- Ensure the engine warms up properly before starting.
- Replace the fuel filter when necessary.
- Tighten the electrical connections.
Final Thoughts
The P1326 glow relay stuck on Kia Optima can result from several issues. If the problem persists after clearing the error code with your diagnostic tool, get to the root causes and fix them.
The glow relay usually sticks in the “on” position due to a faulty relay plug. Other issues like a defective glow plug, faulty engine temperature sensor, electrical shorts, and fuel system problems could be to blame. Diagnose and fix the root problem, or seek professional help to get the job done.