Exhaust Flow Control Valve B Position Circuit High

Where it lives

For P2BFF, the circuit described runs through the valve. The description of P2BFF reports a fault at the valve.

Check these first

• An open in the exhaust flow control valve B position sensor circuit
• A valve B position sensor with an open element
• A short to voltage on the valve B position signal
• Corrosion at the hot valve B connector

What to do next

1. Read exhaust flow control valve B position on a scan tool
2. Check the valve B position sensor connector
3. Test the position circuit for an open and a short to voltage
4. Compare valve B position to the commanded angle
5. Replace the valve B position sensor if the circuit tests good
6. Clear the code and retest

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