Cadillac P1686: Transmission Control Module (TCM) Power Up Temperature Sensor Circuit High Voltage
Is your scanner showing Cadillac P1686?
No worries. We'll show you what it means and how to deal with it.
Cadillac P1686: Transmission Control Module (TCM) Power Up Temperature Sensor Circuit High VoltageOVERVIEW
What Does The Cadillac P1686 Code Mean?
The engine speed is greater than 450 RPM. P1684 No DTCs P0711, P0712, P0713, P0716, P0717, P0722, P0723, or P1684. DTC P1684 has not passed this key ON. The TCM power up temperature is between -39 and +149°C (-38 and +300°F).
How Can You Fix The Cadillac P1686 Code?
Reprogram the TCM and retest the DTC to see if the DTC resets.
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