P1393
Glow Plug Circuit Low Input Bank 2
P1393 is an OBD-II diagnostic trouble code meaning: Glow Plug Circuit Low Input Bank 2. Common causes: malfunction of one or more glow plugs in the second row, open or short circuit in the glow plug circuit. Estimated repair cost: $17–56.
Symptoms
- Difficulty starting the engine, especially in cold weather
- Unstable engine operation after starting
- Increased exhaust smoke during cold start
- Check Engine Light on Dashboard
- Reduced engine power
Causes
- Malfunction of one or more glow plugs in the second row
- Open or short circuit in the glow plug circuit
- Poor contact in the glow plug circuit connectors
- Faulty glow plug relay
- Problems with the engine control unit
How to Fix
- Check the resistance of the second row glow plugs
- Inspect the wiring and connectors of the glow plug circuit for damage.
- Check the operation of the glow plug relay
- If necessary, replace faulty glow plugs
- Check the power and ground of the glow plug circuit
Related codes
Error P1393 by Vehicle Brand
FAQ
What does the P1393 code mean?
P1393 is an OBD-II diagnostic trouble code that indicates: Glow Plug Circuit Low Input Bank 2
What causes a P1393 error code?
The most common causes of P1393 include: Malfunction of one or more glow plugs in the second row; Open or short circuit in the glow plug circuit; Poor contact in the glow plug circuit connectors; Faulty glow plug relay.
How do I fix a P1393 diagnostic trouble code?
To fix P1393: Check the resistance of the second row glow plugs. Inspect the wiring and connectors of the glow plug circuit for damage.. Check the operation of the glow plug relay. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1393?
Yes, but get it checked soon
How much does it cost to fix P1393?
The estimated repair cost for P1393 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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