P2AA2

Alternative Fuel Return Line Insufficient Flow

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Loss of engine power
Increased fuel consumption
Switching to regular fuel
Check Engine Light Is On
Unstable engine operation

Causes

Clogged return line fuel filter
Alternate fuel pump malfunction
Leak in return line
Fuel flow sensor malfunction
Problems with the electronic control unit

How to Fix

Check the tightness of the return line
Replace alternative fuel fuel filter
Check the operation of the fuel pump
Test fuel flow sensors
Reset the error and take a test drive

Related codes

P2AA0 P2AA1 P2AA3