Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the electric switch that powers the part of the car that controls the gears. It's like a light switch that isn't working, so the light (or in this case, the car's gear controller) can't turn on properly.
The TCM (Transmission Control Module) power relay supplies power to the TCM. When the control circuit is open, it means there's a break in the electrical path, preventing the TCM from receiving power.
The P0885 code indicates that the Transmission Control Module (TCM) is not receiving power due to an open circuit in the power relay control circuit. This open condition can be caused by a faulty relay, wiring issues, or a blown fuse, preventing the TCM from functioning correctly.
• Transmission not shifting properly
• Check Engine Light illuminated
• Vehicle may enter limp mode
• Faulty TCM power relay
• Blown fuse
• Damaged or corroded wiring/connectors
TCM: Transmission Control Module
Relay: An electrical switch that opens and closes under the control of another electrical circuit
• Check the TCM power relay for proper operation.
• Inspect the fuse related to the TCM for continuity.
• Examine the wiring and connectors for damage or corrosion.
• Replace the faulty TCM power relay.
• Replace any blown fuses.
• Repair or replace damaged wiring/connectors.
• Multimeter
• Relay tester
• Basic hand tools
$100 - $300
Moderate
• Dodge Caravan
• Chrysler Town & Country
• Jeep Grand Cherokee
• Regularly inspect wiring and connectors for damage.
• Ensure fuses are in good condition.
• Keep the vehicle's electrical system well-maintained.
Electrical Circuit Issue
• Do not ignore the Check Engine Light.
• Avoid driving in limp mode for extended periods.
• Seek professional diagnostic services if unsure.
Check with your vehicle manufacturer for specific warranty coverage related to the transmission and electrical components.
This code has been commonly reported in vehicles with known issues in the TCM power relay circuit, particularly in models with higher mileage.
Moderate – While the vehicle may still be drivable, it is important to address this issue to prevent potential transmission damage.
Driving with a malfunctioning transmission control can lead to unsafe driving conditions. It is recommended to have this issue addressed promptly.
• Vehicle in park or neutral
• Ignition in the on position
The TCM power relay is typically located in the vehicle's fuse box, which can be found under the hood or inside the cabin.
Q: Can I drive my car with the P0885 code?
A: It's possible to drive short distances, but it's not recommended as it can lead to further transmission issues.
Q: How do I reset the P0885 code?
A: After repairs, the code can be cleared using an OBD-II scanner. However, if the issue isn't fixed, the code will return.
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