PCM/ECM/TCM Internal Temperature Sensor Range/Performance
Common Symptoms
- Check Engine Light or Malfunction Indicator Lamp illuminated
- Transmission may remain in limp mode or fail to shift properly
- Erratic or delayed transmission shifting patterns
- Poor fuel economy due to suboptimal transmission control
- Transmission temperature gauge reading incorrectly or not at all
Most Likely Root Causes
- Failed PCM or TCM internal temperature sensor
- PCM or TCM internal circuit fault or component degradation
- Excessive heat exposure causing control module damage
- Control module software corruption or calibration issue
- Physical damage to PCM or TCM housing affecting internal sensor
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Component Location
The PCM or TCM is typically mounted in the engine bay on the firewall, fender well, or inside the vehicle under the dashboard depending on vehicle make and model.
Manufacturer Notes
This code typically indicates an internal control module fault that may require module replacement if software updates and external inspections do not resolve the issue.
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