P1389 Ford Code - Glow Plug Circuit High Side Low Input
Quick Answer
The P1389 diagnostic trouble code (DTC) for Ford vehicles specifically relates to the Glow Plug Circuit High Side Low Input. Common causes include Faulty glow plug(s), Wiring or connection issues in the glow plug circuit, Malfunctioning glow plug relay or control module. 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
- P1389 Ford indicates Glow Plug Circuit High Side Low Input.
- Common causes
- Common causes include Faulty glow plug(s), Wiring or connection issues in the glow plug circuit, Malfunctioning glow plug relay or control module.
- 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.
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Code P1389 Ford Description
The P1389 diagnostic trouble code (DTC) for Ford vehicles specifically relates to the Glow Plug Circuit High Side Low Input. This code indicates an issue with the glow plug system in a diesel engine, which plays a crucial role in starting the engine, especially in cold weather conditions. Glow plugs are essentially heating elements that warm up the air in the combustion chamber to facilitate the ignition of the fuel. When the engine is cold, the glow plugs are activated to ensure efficient combustion.
Common Causes of P1389 Ford
- Faulty glow plug(s).
- Wiring or connection issues in the glow plug circuit.
- Malfunctioning glow plug relay or control module.
- Corrosion or damage to the electrical components in the glow plug system.
- Engine temperature sensor malfunction affecting glow plug operation.
Symptoms of P1389 Ford
- Difficulty starting the engine, especially in cold weather.
- Rough idling or misfiring.
- Decreased fuel efficiency.
- Illumination of the check engine light.
- Engine performance issues, such as lack of power or acceleration.
How to Fix P1389 Ford
- Begin by diagnosing the glow plug system using a scan tool to pinpoint the specific issue.
- Inspect the glow plugs for any signs of damage or wear and replace as necessary.
- Check the wiring and connections in the glow plug circuit for any faults or breaks, repairing or replacing as needed.
- Test the glow plug relay and control module for proper operation and replace if faulty.
- Clear the trouble code from the vehicle's system and test the glow plug system to ensure proper functionality.
Cost to Fix P1389 Ford
The cost of repairing a Glow Plug Circuit High Side Low Input issue can vary depending on the extent of the problem and the specific components that need to be replaced. On average, the cost of parts for this repair can range from $50 to $200, with labor costs adding an additional $100 to $300. Overall, the total repair cost could be between $150 and $500. It's important to note that labor rates at auto repair shops can vary, so it's advisable to obtain quotes from multiple sources to find the best price for the repair.
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