P1393 Code - Glow Plug Circuit Low Input Bank 2
Quick Answer
The P1393 code indicates a problem with the glow plug circuit on Bank 2 of the engine. Common causes include Faulty glow plug(s) on Bank 2, Wiring or connection issues in the glow plug circuit, A problem with the glow plug relay. 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
- P1393 indicates Glow Plug Circuit Low Input Bank 2.
- Common causes
- Common causes include Faulty glow plug(s) on Bank 2, Wiring or connection issues in the glow plug circuit, A problem with the glow plug relay.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P1393 Description
The P1393 code indicates a problem with the glow plug circuit on Bank 2 of the engine. Glow plugs are used in diesel engines to help with cold starts by heating the combustion chamber. When the engine is cold, the glow plug circuit provides the necessary heat to ignite the fuel-air mixture. A low input on the glow plug circuit in Bank 2 can lead to difficulties starting the engine, reduced performance, and increased emissions.
Common Causes of P1393
- Faulty glow plug(s) on Bank 2.
- Wiring or connection issues in the glow plug circuit.
- A problem with the glow plug relay.
- Issues with the engine control module (ECM).
- Corrosion or damage to the glow plug connectors.
Symptoms of P1393
- Hard starting or difficulty starting the engine, especially in cold weather.
- Rough idling or misfiring.
- Decreased fuel efficiency.
- Illumination of the check engine light.
- Increased exhaust emissions.
How to Fix P1393
- Begin by diagnosing the specific glow plug(s) on Bank 2 that are causing the low input issue.
- Test the glow plug relay and wiring for any faults or damage.
- Replace any faulty glow plugs and repair or replace damaged wiring or connectors.
- Clear the diagnostic trouble codes and test the vehicle to ensure the issue has been resolved.
- If the ECM is suspected to be the cause, have it tested and replaced if necessary.
Cost to Fix P1393
The cost of repairing a glow plug circuit low input issue on Bank 2 can vary depending on the extent of the problem and the specific components that need to be replaced. On average, the cost can range from $200 to $500, including parts and labor. Keep in mind that labor rates at auto repair shops can vary, so it's recommended to obtain quotes from multiple sources to find the best price.
Need more information about the P1393 code?
Need more information on how to fix the P1393 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1393 code diagnosed by a professional: Find a repair shop in your area
Code P1393 Information for Specific Makes
- P1393 Acura — G-Sensor Voltage High
- P1393 Audi — Ignition Coil Power Output Stage 1 Malfunction
- P1393 Buick — Wheel Speed Sensor 1 G-Sensor Circuit High Voltage
- P1393 Cadillac — Wheel Speed Sensor 1 G-Sensor Circuit High Voltage
- P1393 Chevrolet — Wheel Speed Sensor 1 G-Sensor Circuit High Voltage
- P1393 Ford — Glow Plug Circuit Low Input Bank 2
- P1393 GMC — Wheel Speed Sensor 1 G-Sensor Circuit High Voltage
- P1393 Honda — G-Sensor Voltage High
- P1393 Isuzu — G-Sensor Circuit High Voltage
- P1393 Saab — Cylinder 3 Misfire Detected Random Fuel Level Low
- P1393 Suzuki — G-Sensor Voltage High Rough road sensor
- P1393 Volkswagen — Ignition Coil Power Output Stage 1 Malfunction
Frequently Asked Questions about P1393 Code
1. What are the common symptoms of OBDII code P1393 (Glow Plug Circuit Low Input Bank 2)?
- Common symptoms include hard starting, rough idling, decreased fuel efficiency, and possible illumination of the Check Engine Light.
2. What are the possible causes of OBDII code P1393?
- The code P1393 can be triggered by issues such as faulty glow plugs, damaged wiring or connectors in the glow plug circuit, or a defective glow plug control module.
3. How can I diagnose the cause of OBDII code P1393?
- To diagnose the issue, you can use a scan tool to check for any additional codes stored in the system, visually inspect the glow plug circuit for damage, and perform electrical tests on the glow plug system components.
4. Can I drive my vehicle with OBDII code P1393?
- It is not recommended to drive your vehicle with the P1393 code as it can lead to poor engine performance and potential damage if left unresolved.
5. How can I repair OBDII code P1393?
- Repairing the P1393 code may involve replacing faulty glow plugs, repairing damaged wiring or connectors, or replacing the glow plug control module as needed.
6. Are there any tips to prevent OBDII code P1393 from occurring again?
- Regularly inspecting and maintaining the glow plug system, using high-quality glow plugs, and ensuring proper electrical connections can help prevent the recurrence of the P1393 code.
7. Can a DIY enthusiast fix OBDII code P1393 at home?
- Depending on your skill level and access to tools, a DIY enthusiast may be able to address the P1393 code by following repair guides and utilizing the necessary equipment.
8. How long does it typically take to repair OBDII code P1393?
- The repair time for the P1393 code varies depending on the exact cause of the issue, but it can usually be resolved within a few hours to a day at a repair shop.
9. Will resetting the Check Engine Light resolve OBDII code P1393?
- Simply resetting the Check Engine Light without addressing the underlying issue causing the P1393 code will not solve the problem; it is crucial to diagnose and repair the root cause.
10. Is it safe to clear the OBDII code P1393 and continue driving without fixing it?
- While clearing the code may temporarily turn off the Check Engine Light, it is not recommended to ignore the underlying issue as it can lead to further engine problems and potential safety hazards.
Discuss the causes and fixes for P1393 OBDII Code
Code P1393 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.