U02BB

Lost Communications with EVAP System Purge Pump

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine Light Is On
The smell of gasoline in or around the car
Increased fuel consumption
Difficulties in engine idle speed
Failed Emission Test Attempts

Causes

Open or short circuit in the purge pump circuit
Faulty EVAP purge pump
Problems with the wiring harness or connectors
Faulty pump relay or fuse
ECU problems (rare)

How to Fix

Check EVAP system fuses and relays
Inspect the purge pump wiring harness and connectors
Check the resistance and voltage on the purge pump
Replace faulty purge pump if necessary
Test the system after repair

Related codes

U02BA U02BC P0440