Isuzu 4HK1 (Tier 3) Fault Code P0193

Fault Code P0193 Common rail pressure sensor fault (high voltage fault)

Item To Be Detected:
Open/short circuit/breakage of sensor or harness

Preconditons When DTC is Set:
1) Key switch input voltage is 18V or more.
2) DTC P1630 or P1635 is not detected.

DTC Set Condition:
Common rail pressure sensor voltage is more than 4.5V.

Fault Judgement Period:
Nearly simultaneous to fault occurrence

Behavior When Trouble Occurs:
1) Engine stall possible Output
2) Output lowering Back-up: Specified back-up value (depending on the machine manufacturer)

Diagnosis Lamp: ON

Recovery From Failure: *2

Possible Causes:
1) Common rail pressure sensor more or less than specified value.
2) Looseness or play in connection between ECM and coupling connector.
3) Short in common rail pressure sensor.
4) Bad common rail pressure sensor.
5) Open circuit or high resistance between ECM and common rail pressure sensor.
6) Bad ECM.
7)DDM indication less than specified value.

Isuzu 4HK1 (Tier 3) Fault Code P0192

Isuzu 4HK1 (Tier 3) Fault Code P0183

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