Code result
P2AA0
Alternative Fuel Return Line Valve Control Circuit Low
High severity
What it means
The control circuit of the alternative fuel return line valve reports a control circuit low condition. Excess fuel return to the tank cannot be commanded as expected.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Control wire shorted to ground
highOne of the most commonly reported causes for this code — check this first.
Internal short in valve coil
mediumA plausible cause — test and verify before replacing parts.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Related help
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