P27EF

Transmission Range Control B Position Sensor/Switch Circuit/Open

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Incorrect gear shifting
Check Engine light comes on
The gearbox goes into emergency mode
Difficulty starting the engine
Unexpected shift to neutral

Causes

Open or short circuit in the sensor circuit
Gear Position Sensor B Malfunction
Poor contact in the sensor connector
Wiring harness damage
Transmission control unit malfunction

How to Fix

Check the integrity of the sensor circuit
Inspect connectors and contacts for oxidation
Check the resistance of the position sensor
Replace gear position sensor B if necessary
Check the operation of the transmission control unit

Related codes

P27EE P27F0 P27F1