FixVault

On Board Diagnosis Logic

DTC DETECTING CONDITION CHART

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1220
1220
Fuel pump control module (FPCM) An improper voltage signal from the FPCM, which is supplied to a point between the fuel pump and the dropping resistor, is detected by ECM.
  • Harness or connectors (FPCM circuit is shorted.)
  • Dropping resistor
  • FPCM