P071F

Transmission Mode Switch B Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–167 (est.)

Symptoms

Transmission shifting in only one gear
Check Engine light comes on
The transmission is in emergency mode
Reduced vehicle acceleration dynamics

Causes

Broken or damaged wiring in the switching circuit
Malfunction of the transmission mode switch sensor
Short circuit to positive in the circuit
Transmission Control Module (TCM) Problems

How to Fix

Check the integrity of the wiring in the switching circuit
Check the voltage and resistance of the sensor
Scan the TCM for errors
Replace the mode switch sensor if necessary

Related codes

P071E P0720 P0721