Isuzu 4HK1 (Tier 3) Fault Code P0238
Fault Code P0238 Boost pressure sensor fault (high voltage fault)
Item To Be Detected:
Short circuit in sensor or harness
Preconditons When DTC is Set:
1) Key switch input voltage is 18V or more.
2) DTC P1630 or P1634 is not detected.
DTC Set Condition:
Boost pressure sensor voltage is more than 4.9V.
Fault Judgement Period:
Approx. 3 sec.
Behavior When Trouble Occurs:
1) Black smoke emitted
2) Back-up: Specified back-up value (depending on the machine manufacturer)
Diagnosis Lamp: ON
Recovery From Failure: *2
Possible Causes:
1) Manifold absolute pressure sensor more or less than specified value.
2) Looseness or play in the connection between ECM connector and boost pressure sensor connector.
3) Boost pressure sensor circuit is shorted to the power supply circuit.
4) Bad boost pressure sensor.
5) Open circuit or high resistance between ECM and boost pressure sensor.
6) Bad ECM.
7) Boost pressure sensor display showing error value.
8) Looseness or play in the connection of the ECM connector and coupling connector.
If you want to know other articles similar to Isuzu 4HK1 (Tier 3) Fault Code P0238 you can visit the category TRUCK MANUALS.
Leave a Reply