P2667Fuel Shutoff Valve B Control Circuit High
- Generic OBD-II code · Powertrain
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- With P2667 the module measures excess voltage on the wire that drives shut-off valve B, usually because the wire touches a supply circuit. Safety matters here: on a low-side driven valve a short to voltage can keep the coil energised even when the module wants the valve closed, so the gaseous fuel may not be shut off reliably. No manufacturer explains P2667 publicly. GM's bi-fuel Impala relies on two normally closed cut-off valves that the ECM opens only while the engine runs on CNG, and falls back to gasoline whenever either fuel system reports a problem; Ford lists the open-circuit sibling P2665. P2665 and P2666 cover the open and grounded circuit, P0007 the high fault on valve A. Have it checked promptly and use the manual tank valve if gas can be smelled.
- What you may notice
- Gas mode disabled, operation on gasoline only
- Fuel mode lamp indicates an error
- Possible gas smell if the valve does not close
- Likely causes
- LikelyControl wire shorted to a voltage supply
- PossibleCorrosion bridging pins in the valve connector
- RareFaulty output stage in the control module
- Inspection (ITP)
- Can matter for the ITP: it concerns the emissions system.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.