P0815 Honda Code - Short In Transmission Gear Selection Switch Upshift/Dowshift Switch Circuit
Quick Answer
The P0815 diagnostic trouble code (DTC) for Honda vehicles indicates a short in the transmission gear selection switch upshift/dowshift switch circuit. Common causes include Faulty transmission gear selection switch, Short in the wiring or circuitry related to the switch, Corrosion or damage to the electrical connections. 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
- P0815 Honda indicates Short In Transmission Gear Selection Switch Upshift/Dowshift Switch Circuit.
- Common causes
- Common causes include Faulty transmission gear selection switch, Short in the wiring or circuitry related to the switch, Corrosion or damage to the electrical connections.
- 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 P0815 Honda Description
The P0815 diagnostic trouble code (DTC) for Honda vehicles indicates a short in the transmission gear selection switch upshift/dowshift switch circuit. This means that there is an issue with the circuit that controls the transmission gear selection, specifically related to the upshift and downshift functions. The transmission gear selection switch is responsible for sending signals to the vehicle's transmission control module (TCM) to indicate the desired gear selection, whether it be upshifting or downshifting.
Common Causes of P0815 Honda
- Faulty transmission gear selection switch
- Short in the wiring or circuitry related to the switch
- Corrosion or damage to the electrical connections
- Issues with the TCM or transmission control module
- Electrical issues such as a blown fuse or relay related to the transmission system
Symptoms of P0815 Honda
- Harsh shifting
- Delayed shifting
- Transmission getting stuck in a gear
- Poor acceleration
- Decreased fuel efficiency
How to Fix P0815 Honda
- Diagnose the issue by using a scan tool to retrieve the DTC and inspecting the transmission gear selection switch and related wiring.
- Test the transmission gear selection switch to ensure proper functionality.
- Inspect and repair any damaged or corroded wiring and connections in the circuit.
- Replace the transmission gear selection switch if it is found to be faulty.
- Clear the DTC and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P0815 Honda
The cost of repairing a P0815 code can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. Typically, the cost of replacing a transmission gear selection switch can range from $150 to $300, including parts and labor. Additional costs may apply if there are other underlying issues that need to be addressed. It is recommended to consult with a professional mechanic for a more accurate cost estimate based on the vehicle's make and model.
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Frequently Asked Questions about P0815 Honda Code
1. What does the OBDII code P0815 mean on a Honda?
P0815 indicates a short in the circuit related to the transmission gear selection switch, specifically in the upshift/downshift switch circuit.
2. What are the common symptoms of the P0815 code on a Honda?
Common symptoms include erratic shifting, transmission stuck in one gear, illuminated check engine light, and poor vehicle performance.
3. What causes the P0815 code to appear on a Honda?
Potential causes include damaged wiring, short circuits in the gear selection switch circuit, a faulty transmission gear selection switch, or a malfunctioning transmission control module (TCM).
4. Can I still drive my Honda if the P0815 code is triggered?
While the vehicle may still be drivable, it could experience shifting issues that may worsen over time. It’s best to address the issue promptly to avoid further damage.
5. How do I diagnose the P0815 code on a Honda?
Diagnosis involves scanning for trouble codes, inspecting the wiring and connectors for damage or shorts, and testing the gear selection switch and related circuits for proper operation.
6. How do I fix the P0815 code on a Honda?
Repairs may include replacing damaged wiring, repairing short circuits, replacing the transmission gear selection switch, or reprogramming or replacing the TCM if necessary.
7. How much does it cost to fix the P0815 code on a Honda?
Repair costs vary depending on the cause, but wiring repairs may cost $100–$300, while replacing the gear selection switch could cost $200–$500, including labor.
8. Can a faulty TCM cause the P0815 code on a Honda?
Yes, a malfunctioning transmission control module can cause this code, although wiring or switch issues are more common culprits.
9. How is the P0815 code related to the gear selection switch?
The P0815 code is triggered when the transmission control module detects a short circuit in the upshift or downshift switch circuit, which is part of the gear selection switch system.
10. Will clearing the P0815 code fix the issue on my Honda?
Clearing the code may temporarily turn off the warning light, but the root cause of the issue must be addressed to prevent the code from returning.
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