Workshop Manuals Factory service & repair Fiat
Fiat 500 Factory Service Manual (2007-2024)22 · Fault diagnosis
22 · Diagnostics

Minimum engine oil pressure warning light on constantly

Make
Fiat
Model
500 Factory Service Manual
Year
2007–2024
Section
Instrument panel › Minimum engine oil pressure warning light on constantly
Fault diagnosisMinimum engine oil pressure warning light on constantly

MINIMUM ENGINE OIL PRESSURE WARNING LIGHT ON CONSTANTLY

1.2 8v, 1.3 Multijet, 1.4 16v

The Engine Management Node sends a message via the C-CAN to the Body Computer, which makes it available via the B-CAN, to the Instrument Panel node.

Faults in the C-CAN will turn on the warning lights for the control units that communicate on this network. Verification of the CAN Information is intended to detect this situation

Test results
1PRELIMINARY CHECKSALL OKPROBLEMS ENCOUNTEREDACTION

Connect an Examiner and check on CAN Network Information for the absence of:

  • Inactive node/s
  • Node/s with error/s
  • Node/s with CAN network error/s
Move on to Step 6

1. Engine Control Node inactive and/or with error

2. Fault on CAN network

1. Continue as instructed by the diagnostic equipment

2. Continue as instructed by the diagnostic equipment

2CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
Use an Examiner to check the possibility of connection to the Body Computer Node, the lack of errors and the presenc of parametersMove on to Step 3Presence of errorsContinue as instructed by the diagnostic equipment
3ACTIVE DIAGNOSIS CHECKALL OKPROBLEMS ENCOUNTEREDACTION
With the Examiner in Instrument Panel Node mode, check that the minimum oil pressure warning light is correctly activated in Active Diagnosis.Move on to Step 41. The warning light does not flash

1. Replace the Instrument Panel

Op. 5560B10 CONTROL PANEL - R+R

4OIL PRESSURE SENSOR CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check correct operation of the oil pressure sensorMove on to Step 5

1. Pressure sensor defective

2. Oil circuit pressure not correct

3. Sensor wiring defective

1. Replace the pressure sensor

Op. 1084A42 ENGINE OIL PRESSURE WARNING LIGHT SWITCH - R + R

2. Restore the correct pressure

3. Restore wiring

5CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
Using an Examiner check, in Engine Control Node mode, that there are no errors and that the parameters are present.Move on to Step 6Fault persists

Replace the Engine Management Control unit (For the 1.3 Multijet version)

Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R

For the 1.2 8V and 1.4 16V versions

Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R

6CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
Check that the fault is no longer presentEnd of diagnosis

Parts & tools for this job For 2007 Fiat 500

Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.