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Group 28 Troubleshooting
MID 128 PID 100 Engine Oil Pressure
In addition to the oil pressure, the sensor also measures the oil temperature.
Fault Codes
FMI 1
Pressure too low.
Conditions for fault code:
•
The voltage on EA14 is below the alarm limit.
Possible cause:
•
Fault in overflow valve.
•
Oil level too low.
•
Contaminated oil, slow-flowing or too thin.
•
Worn oil pump.
•
Fault in sensor.
Reaction from the EECU:
•
Fault code is set.
•
Power reduction in the first stage and shutdown in
2nd stage (if engine protection is chosen in the data
set).
Noticeable external symptom:
•
LED lights up at the oil pressure gauge.
•
Power reduction (if engine protection is chosen in
the data set).
•
Engine shut-down if the vehicle speed falls below 5
mph (3 km/h), if engine protection is chosen in the
data set.
FMI 3
Short circuit to voltage.
Conditions for fault code:
•
The voltage on EA14 exceeds 4.95 V.
Possible cause:
•
Short circuit to battery voltage, 5 V supply wire.
•
Short circuit to battery voltage or 5 V, signal wire.
•
Fault in sensor.
Reaction from the EECU:
•
Fault code is set.
•
Yellow lamp is requested.
•
The EECU stops sending PID 100.
Noticeable external symptom:
•
Yellow lamp lights up.
•
The oil pressure gauge shows 0.
FMI 4
Short circuit to ground or open circuit.
Conditions for fault code:
•
The voltage on EA14 is under 0.08 V.
Possible cause:
•
Break, 5 V supply wire.
•
Break, signal wire.
•
Short circuit to ground, 5 V supply wire.
•
Short circuit to ground, signal wire.
•
Fault in sensor.
Reaction from the EECU:
•
Fault code is set.
•
Yellow lamp is requested.
•
The EECU stops sending PID 100.
Noticeable external symptom:
•
Yellow lamp lights up.
•
The oil pressure gauge shows 0.
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