The P0853 code is an OBD-II trouble code that indicates a problem with the Drive Switch Input Circuit. This code is related to the Overdrive/Tow Switch, which informs the engine computer (PCM) about towing situations so that the transmission can adjust its performance accordingly.
What Does the P0853 Code Mean?
When the PCM receives an implausible signal from the Overdrive/Tow Switch, it triggers the P0853 code. This can affect the vehicle’s transmission performance, particularly when towing loads, and may lead to further complications if not addressed promptly.
What Causes the P0853 Code?
- Shift lever assembly failure
- Transmission Control Module (TCM) failure
- Wiring issues related to the switch or TCM
What Are the Symptoms of the P0853 Code?
Symptoms associated with the P0853 code may include:
- Transmission not shifting properly
- Warning lights on the dashboard
- Inability to engage overdrive or tow mode
How Serious Is the P0853 Code?
The P0853 code is considered urgent. It indicates significant malfunctions that can lead to severe damage to the vehicle’s transmission or create safety hazards for the driver and passengers if left unaddressed.
How to Diagnose the P0853 Code
Diagnosing the P0853 code requires a systematic approach:
- Use an OBD-II scanner to confirm the P0853 code and check for any related codes.
- Inspect the wiring and connectors for any signs of damage or corrosion.
- Test the Overdrive/Tow Switch for functionality.
- Evaluate the shift lever assembly for any failures.
- Check the Transmission Control Module (TCM) for faults.
Common Repairs for the P0853 Code
Common repairs may include:
- Replacing the Overdrive/Tow Switch
- Repairing or replacing damaged wiring or connectors
- Servicing or replacing the shift lever assembly
- Repairing or replacing the Transmission Control Module (TCM)
How Much Does It Cost to Fix the P0853 Code?
The cost of fixing the P0853 code can vary widely based on the specific issue:
- Switch replacement: $50 – $200
- Wiring repairs: $100 – $300
- Shift lever assembly repair: $150 – $500
- TCM replacement: $300 – $1,500
Can I Fix the P0853 Code Myself?
While some basic diagnostic steps can be performed at home, such as checking for wiring issues or replacing the Overdrive/Tow Switch, more complex repairs like TCM replacement may require professional assistance. It’s essential to understand the risks of misdiagnosis and the potential for further damage if repairs are not performed correctly.
