Code No. P1277: Fuel Filter Freeze <Vehicles for Eastern Europe countries>


FUNCTION



  • The engine-ECU estimates that the fuel filter is freezing, using the input signal from the each sensor.
  • When storing this diagnosis code, the engine-ECU blinks the glow lamp.

TROUBLE JUDGMENT


Check Conditions
  • During steady driving
  • Fuel temperature is lower than specified temperature.
  • Engine coolant temperature is lower than specified temperature
Judgment Criteria
  • Determination of clogged fuel filter.
  • Fuel pressure hunting occurs more than certain degree, or difference more than certain degree exists between target fuel pressure and actual fuel pressure

PROBABLE CAUSE



  • Fuel filter freezing

DIAGNOSTIC PROCEDURE

STEP 1. Reconfirmation of M.U.T.-III diagnosis code after warming up the engine.

Q. Is any other diagnosis code than P1276 set?
Inspection chart for diagnosis code (Refer to ).
Check end.