P071A

Transmission Mode Switch A Circuit

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–67 (est.)

Symptoms

Unstable gear shifting
Check Engine Light Illuminates
The gearbox goes into emergency mode
Inability to switch between modes
Incorrect display of the selected mode on the instrument panel

Causes

Malfunction of the automatic transmission mode switch
Open or short circuit in switch circuit
Oxidation of switch contacts
Problems with the transmission control module
Wiring harness damage

How to Fix

Check the status of the mode switch
Diagnose the switch circuit for open/short circuit
Clean contacts from oxidation
Check connectors and wiring harness
If necessary, replace the mode switch

Related codes

P071B P071C P071D