P0885 Code - TCM Power Relay Control Circuit/Open
Quick Answer
The P0885 diagnostic trouble code (DTC) refers to a malfunction in the Transmission Control Module (TCM) Power Relay Control Circuit, indicating that there is an open circuit or a lack of continuity in the power relay control circuit. Common causes include Faulty TCM Power Relay: A malfunctioning TCM power relay can cause an open circuit in the power relay control circuit, Wiring Issues: Damaged or corroded wiring connections can disrupt the flow of electricity in the power relay control circuit, Poor Ground Connection: A poor ground connection can prevent the TCM from receiving the necessary power to function correctly. 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
- P0885 indicates TCM Power Relay Control Circuit/Open.
- Common causes
- Common causes include Faulty TCM Power Relay: A malfunctioning TCM power relay can cause an open circuit in the power relay control circuit, Wiring Issues: Damaged or corroded wiring connections can disrupt the flow of electricity in the power relay control circuit, Poor Ground Connection: A poor ground connection can prevent the TCM from receiving the necessary power to function correctly.
- 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 P0885 Description
The P0885 diagnostic trouble code (DTC) refers to a malfunction in the Transmission Control Module (TCM) Power Relay Control Circuit, indicating that there is an open circuit or a lack of continuity in the power relay control circuit. The TCM is responsible for controlling and coordinating the operation of the transmission in automatic vehicles. When this circuit malfunctions, it can lead to issues with the transmission's performance, including shifting problems, erratic behavior, and potential damage to the transmission system.
Common Causes of P0885
- Faulty TCM Power Relay: A malfunctioning TCM power relay can cause an open circuit in the power relay control circuit.
- Wiring Issues: Damaged or corroded wiring connections can disrupt the flow of electricity in the power relay control circuit.
- Poor Ground Connection: A poor ground connection can prevent the TCM from receiving the necessary power to function correctly.
- TCM Module Failure: A failing or malfunctioning TCM module can cause issues with the power relay control circuit.
- Electrical System Malfunction: Problems with the vehicle's electrical system, such as a blown fuse or a short circuit, can trigger the P0885 code.
Symptoms of P0885
- Check Engine Light: The most common symptom associated with the P0885 code is the illumination of the Check Engine Light on the vehicle's dashboard.
- Transmission Issues: The vehicle may experience erratic shifting, delayed gear engagement, or difficulty shifting gears.
- Loss of Power: The vehicle may exhibit a loss of power or reduced acceleration.
- Stalling: The engine may stall unexpectedly, especially when coming to a stop.
- Poor Fuel Efficiency: The vehicle may experience decreased fuel efficiency due to the transmission not operating optimally.
How to Fix P0885
- Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble codes and perform a thorough inspection of the TCM power relay control circuit to identify the specific cause of the problem.
- Check Wiring Connections: Inspect the wiring connections for any damage, corrosion, or loose connections. Repair or replace any faulty wiring as needed.
- Test the TCM Power Relay: Test the TCM power relay to ensure it is functioning correctly. Replace the relay if it is found to be faulty.
- Check Ground Connection: Verify the ground connection for the TCM and ensure it is secure and free of corrosion. Clean or tighten the ground connection if necessary.
- Clear Codes and Test Drive: Clear the diagnostic trouble codes from the vehicle's computer and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0885
The typical repair costs for addressing a P0885 code can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for replacing a faulty TCM power relay or repairing wiring connections can range from $50 to $200. Labor costs at auto repair shops typically range from $80 to $150 per hour, and the total repair bill can vary from $150 to $500 or more, depending on the complexity of the repair process.
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Code P0885 Information for Specific Makes
- P0885 Chrysler — TCM Power Relay Control Circuit/Open
- P0885 Dodge — TCM Power Relay Control Circuit/Open
- P0885 Hyundai — A/T Control Relay Malfunction
- P0885 Jeep — TCM Power Relay Control Circuit/Open
- P0885 KIA — A/T Control Relay Malfunction
- P0885 RAM — TCM Power Relay Control Circuit/Open
Frequently Asked Questions about P0885 Code
What does the OBDII code P0885 mean?
P0885 indicates a problem with the Transmission Control Module (TCM) power relay control circuit, specifically that the circuit is open or there is a malfunction.
What are the common symptoms of a P0885 code?
Common symptoms include the check engine light being illuminated, transmission shifting issues, and the vehicle may enter limp mode or fail to shift properly.
What can cause the P0885 code to trigger?
Causes can include a defective TCM power relay, a blown fuse, wiring issues such as shorts or open circuits, or a malfunctioning transmission control module itself.
How can I diagnose a P0885 code?
Start by checking the TCM power relay and related fuses for faults. Then, inspect the wiring and connectors for damage. Use a multimeter to test the relay and circuit for continuity.
What is the typical repair for a P0885 code?
Repairs may involve replacing a faulty TCM power relay, fixing wiring issues, or replacing blown fuses. In some cases, the TCM may need to be reprogrammed or replaced.
Can I drive my vehicle with a P0885 code?
It is not advisable to drive the vehicle as the transmission may not function properly, which can lead to further damage or unsafe driving conditions.
Will clearing the code P0885 reset my vehicle's systems?
Clearing the code may turn off the check engine light temporarily, but if the underlying issue is not resolved, the code will likely return.
How can I prevent the P0885 code from recurring?
Regular maintenance, such as checking the electrical system and ensuring connections are secure, can help. Address any transmission issues promptly to avoid further complications.
Is there a specific vehicle make or model that is more prone to P0885 codes?
While any vehicle with an automatic transmission can experience a P0885 code, some specific models may have known issues with their TCM or relay systems. Checking manufacturer service bulletins can provide more insight.
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