Transmission Fluid Level Sensor Circuit High
This code means the PCM/ECM has detected a high-voltage circuit condition affecting transmission fluid level sensor. When this happens, the transmission may not control clutch apply pressure or gear changes correctly, which can lead to harsh shifting, slipping, delayed engagement, or fail-safe mode.
What You Might Notice
- Check Engine Light illuminated
- Harsh or delayed shifting
- Transmission slipping or wrong gear feel
- Vehicle may enter limp mode
- Poor acceleration
Most Common Causes
- 1
Short to voltage or an internally failed component
- 2
Damaged wiring or poor connector contact
- 3
Low, dirty, or incorrect transmission fluid
- 4
Internal valve body or clutch problem
- 5
Fault in the TCM/PCM or calibration
How to Diagnose It
- 1
Check Short to voltage or an internally failed component — Inspect for signs of failure and test before replacing.
- 2
Check Damaged wiring or poor connector contact — Inspect for signs of failure and test before replacing.
- 3
Check Low, dirty, or incorrect transmission fluid — Inspect for signs of failure and test before replacing.
- 4
Check Internal valve body or clutch problem — Inspect for signs of failure and test before replacing.
- 5
Check Fault in the TCM/PCM or calibration — Inspect for signs of failure and test before replacing.
How to Fix It
- 1
Verify the code with scan data and freeze-frame information
- 2
Check transmission fluid level and condition
- 3
Test the affected sensor, solenoid, or actuator and replace it if faulty
- 4
Repair damaged wiring or poor connections
- 5
Perform relearn procedures or deeper hydraulic/internal diagnosis if needed
Need a deeper diagnosis?
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