P27F1

Transmission Range Control B Position Sensor/Switch Circuit Low

Severity

⚠️ Medium

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$17–56 (est.)

Symptoms

Incorrect display of the current gear on the dashboard
Gear shifting problems
Transmission transition to emergency mode
Check Engine Light Illuminates
Failure to start the engine in certain selector positions

Causes

Open or short circuit in the sensor circuit
Transmission range position sensor malfunction
Poor contact in sensor connectors
Problems with power supply or sensor ground
Mechanical damage to the sensor or its mounting

How to Fix

Check the integrity of the sensor wiring and connectors
Check the supply voltage and ground of the sensor
Check the resistance and operation of the sensor
Replace the faulty sensor if necessary
Clean and check connectors

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