U0032

Vehicle Communication Bus A (+) High

Severity

🔴 High

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$6–33 (est.)

Symptoms

Unstable engine operation
Lack of communication with some modules
Check Engine light comes on
Transmission problems
Lost connection with diagnostic equipment

Causes

Short circuit in the CAN bus circuit
Malfunction of one of the electronic control units
Damage to wiring or connectors
Problems with contacts in CAN bus connectors
Malfunction of the transmission control unit

How to Fix

Check the integrity of the CAN bus wiring
Check contacts in bus connectors
Test the bus voltage with a multimeter
Disable the modules one by one to find the faulty one.
Check module grounding

Related codes

U0037 U0041 U0100