Powertrain, generic (extended)

P2667 Fuel Shutoff Valve B Control Circuit High

Check engine lightUsually off
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Control wire shorted to a voltage supply
Corrosion bridging pins in the valve connector
Faulty output stage in the control module

Symptoms

  • Gas mode disabled, operation on gasoline only
  • Fuel mode lamp indicates an error
  • Possible gas smell if the valve does not close

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–500
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

fuel shutoff valve bsolenoidwiring harness

Related codes

P2665P2666P0007

References: law.cornell.edu, static.nhtsa.gov, performanceparts.ford.com.