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Home >> Infiniti >> 2017 >> QX80 Base, RWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (DTCS) (1 Of 4) >> DTC/Circuit Diagnosis >> DTC P0025: Exhaust Valve Timing Control >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

NOTE:

If DTC P0025 is displayed with DTC P0084 or P1084 first perform trouble diagnosis for DTC P0084 or P1084. Refer to  DTC LOGIC   (P0084) or  DTC LOGIC  (P1084). 

DTC No. Trouble diagnosis name
(Trouble diagnosis content)
Detecting condition Possible cause
P0025 B camshaft position B2
("B" camshaft position - timing over-retarded bank 2)
During the retarded control of exhaust valve timing control, the angle difference between actual angle and target angle is 13 degrees or more.
  • Crankshaft position sensor
  • Camshaft position sensor
  • Exhaust valve timing control position sensor
  • Exhaust valve timing control solenoid valve
  • Accumulation of debris to the signal pick-up portion of the camshaft
  • Timing chain installation
  • Foreign matter caught in the oil groove for exhaust valve timing control