Transmission Fluid Temperature Sensor B Circuit High

Where it lives

For P2743, the circuit described runs through the sensor. The description of P2743 reports a fault at the sensor.

Check these first

• An open return on the transmission fluid temperature sensor B signal wire
• High resistance in the transmission fluid temperature sensor B circuit
• A failed transmission fluid temperature sensor B
• A corroded transmission fluid temperature sensor B connector

What to do next

1. Read transmission fluid temperature sensor B on a scan tool
2. Test the transmission fluid temperature sensor B circuit for an open return
3. Measure transmission fluid temperature sensor B resistance
4. Check the transmission fluid temperature sensor B connector pins
5. Replace transmission fluid temperature sensor B if the circuit tests good
6. Clear the code and retest

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