P2781

Downshift Switch Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Incorrect downshift
Check Engine Light Illuminates
Transmission transition to emergency mode
Unclear gear shifting
Increased engine speed when decelerating

Causes

Short circuit to positive in the sensor circuit
Faulty gear shift sensor
Damaged wiring harness
Poor contact in the connector
Transmission control module (TCM) malfunction

How to Fix

Check wiring and connections in the switching circuit
Test the downshift sensor
Check resistance and voltage in the circuit
Replace the faulty sensor if necessary
Update TCM software when updates are available

Related codes

P2780 P2782 P2783