P0818

Driveline Disconnect Switch Input Circuit

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine Light Is On
Gear shifting problems
Unexpected transmission behavior
Reduced engine power
Errors in the operation of the all-wheel drive system (if any)

Causes

Open or short circuit in switch circuit
Transmission disconnect switch malfunction
Problems with wiring harness or contacts
Transmission control module (TCM) malfunction
Corrosion or oxidation of contacts

How to Fix

Check the continuity of the switch circuit
Check the condition of the contacts and wiring harness
Test the transmission disconnect switch
Check Transmission Control Module (TCM) operation
Replace switch or repair circuit if necessary

Related codes

P0817 P0819 P0820