Powertrain, generic (extended)

P224E Alternative Fuel Tank Shutoff Valve A Control Circuit Low

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modeNo

P224E sets when the control line of tank shutoff valve A reads too low. The DTC list of CNG upfitter TransEco Energy for its alternative fuel control module (AFCM v1.4) blames the line touching ground or being interrupted, turns on the MIL in both dedicated and bi-fuel setups and lets the system keep operating normally rather than forcing a fallback. The same list uses P2A24 and related numbers for valves B to E. Ford's own Boss 302S code list also contains P224E. On a normally closed valve such as the one on GM's bi-fuel Impala, a grounded control wire may keep the solenoid from switching as intended. P224F is the high side, P224C the general open circuit. Gas lines must stay sealed during wiring repairs.

Likely causes

Control wire of the tank valve chafed through to ground

Open circuit, which some modules report under this code

Shorted solenoid coil in the valve

Symptoms

Check engine light
Gas operation unavailable or interrupted

Repair estimate

DifficultyHardWorkshop job

Parts and labour€80–900

Time0.5–3 h

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

Parts involved

alternative fuel shutoff valve

Related codes

P224C P224D P224F P2A24

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