P06AB: Control Module Internal Temperature Sensor B Circuit
Standardized SAE J2012 code · P06xx — Computer and output circuits
What does P06AB mean?
Control modules can carry a second internal temperature sensor (B). In GM's 6T70/6T75 and related automatics, sensor A measures the circuit board (substrate) temperature, sensor B the 'power-up temperature' used as a reference and substitute; both sit inside the transmission module in the valve body, so repairs mean module or valve body. P06AB is the general circuit fault of sensor B. No manufacturer table available to us uses P06AB itself – GM splits the faults into range (P06AC), low (P06AD) and high (P06AE). Expect a warning lamp and a substitute temperature with changed shifting.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Warning or check engine light
- Changed shift quality (substitute value)
- Implausible module temperature in the scan tool
Common causes
- High Transmission module or valve body (internal sensor) faulty
- Medium Moisture or fluid in the module electronics
- Low Module supply or software
Likelihood is a general estimate across vehicles; your make and model may differ.
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Describe your P06AB problemRelated codes
- P0666 Control Module Internal Temperature Sensor A Circuit
- P06AA Control Module Internal Temperature B Too High
- P06AC Control Module Internal Temperature Sensor B Range/Performance
- P06AD Control Module Internal Temperature Sensor B Circuit Low
- P06AE Control Module Internal Temperature Sensor B Circuit High