Fuel Temperature Sensor B Circuit High

Where it lives

For P0188, the sensor sits on the circuit this code reports. The description of P0188 reports a fault at the sensor.

Check these first

• An open in the sensor B signal wire
• High resistance at the sensor B connector
• A failed fuel temperature sensor B
• A poor sensor B ground
• A faulty ECM input for sensor B

What to do next

1. Check the voltage at the sensor B signal wire
2. Test the sensor B circuit for an open
3. Inspect the sensor B connector for a loose fit
4. Measure the sensor B resistance against spec
5. Repair the wiring or replace the sensor B
6. Clear the code and retest

Look up another code