Posted in MMC L200

P1277 – Fuel Filter Freeze MMC L200 IV

 Posted by  Posted on September 29, 2020

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

  • During steady driving
  • Fuel temperature is lower than specified temperature
  • Engine coolant temperature is lower than specified temperature
  • 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

    • DIAGNOSIS PROCEDURE

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

    Q. Is any other diagnosis code than P1276 output?

    Author: admin