P2A91

Alternative Fuel Tank Select Valve A Control Circuit/Open

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Switching to reserve fuel does not occur
Check Engine light comes on
Reduced engine power
Increased fuel consumption
The car runs on only one type of fuel

Causes

Open or short circuit in valve control circuit
Fuel selection solenoid valve malfunction
Poor contact in circuit connectors
Wiring harness damage
Engine control unit malfunction

How to Fix

Check valve control circuit integrity
Check valve resistance and operation
Inspect connectors and contacts for corrosion
Check for voltage in the control circuit
If necessary, replace the valve or repair the wiring

Related codes

P2A90 P2A92 P2A93