Hybrid/EV Electronics Coolant Temperature Sensor B Circuit High

Where it lives

For P2B23, the sensor sits on the circuit this code reports. The description of P2B23 reports a fault at the sensor.

Check these first

• An open circuit in the hybrid electronics coolant temperature sensor B signal
• A failed hybrid electronics coolant temperature sensor B reading high
• A corroded sensor B connector on the electronics coolant loop
• A sensor B signal wire broken by heat or vibration

What to do next

1. Scan all modules and read hybrid electronics coolant temperature sensor B
2. Inspect the sensor B connector for corrosion or heat damage
3. Test the sensor B signal circuit for an open
4. Measure sensor B resistance against the electronics coolant range
5. Replace hybrid electronics coolant temperature sensor B if the wiring is intact
6. Clear the code and retest

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