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DTC codes / P00xx · Fuel and air metering and auxiliary emission controls / P00B1

P00B1Radiator Coolant Temperature Sensor Circuit

P00B1 indicates that the powertrain control module has detected an abnormal signal from the radiator coolant temperature sensor circuit, which monitors the temperature of the coolant leaving the radiator. The computer compares this reading with other temperature sensors and sets the code when the signal is out of range, intermittent, or implausible.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyIntermediate
AreaFuel and air metering and auxiliary emission controls

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

Running on fumes Free guides aren't free to make. Top up the tank. Any amount, one time. Fuel the Garage