Transmission Fluid Temperature Sensor A Circuit Intermittent
Common Symptoms
- Check Engine Light or transmission warning light illuminated
- Harsh or delayed transmission shifts
- Transmission stuck in limp mode or failsafe
- Erratic speedometer or gear indicator display
- Transmission fails to shift out of lower gears
Most Likely Root Causes
- Intermittent wiring or connector issue at transmission fluid temperature sensor
- Corroded or loose transmission fluid temperature sensor connector pins
- Damaged wiring harness between sensor and transmission control module
- Faulty transmission fluid temperature sensor with intermittent internal failure
- Low transmission fluid level causing intermittent sensor exposure
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Component Location
Transmission fluid temperature sensor is typically mounted inside the transmission pan or valve body, accessible from underneath the vehicle.
Manufacturer Notes
Some manufacturers program transmission control modules to enter limp mode immediately when intermittent temperature sensor signals are detected.
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