P2AB2

Catalyst Heater Control Module Supply Voltage

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Check Engine light comes on
Deterioration of environmental indicators
Possible starting problems in cold weather
Increased fuel consumption
Reduced engine power

Causes

Damage to the wiring to the heating module
Malfunction of the heating control module
Problems with the catalyst heating relay
Open or short circuit in the circuit
Engine control unit malfunction

How to Fix

Check the heating circuit fuse
Check the integrity of the wiring to the module
Check the functionality of the heating relay
Test the heating control module
Check system operating parameters with a scanner

Related codes

P2AB0 P2AB1 P2AB3