22 · Diagnostics

Low engine oil pressure

Fault diagnosisLow engine oil pressure

LOW ENGINE OIL PRESSURE

2.0 TB, 2.4 20V, 3.0 V6

The special warning light indicates a decrease in pressure in the engine lubrication circuit.

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
0	PRELIMINARY CHECKS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check: that the engine oil level is correct that there are no significant leaks from lubrication circuit	Move on to Step	1. Oil level low	1. Restore the correct level
		Move on to Step	2. Leaks detected	2. Eliminate leaks
1	LUBRICATION SYSTEM PRESSURE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the lubrication system pressure is correct See in Op. 0510C20 ENGINE LUBRICATION SYSTEM - Check SUPPLY PRESSURE	Move on to Step	Low engine oil pressure	Move on to Step
2	LUBRICATION SYSTEM CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the engine oil pump is working properly	Move on to Step	Oil pump faulty	Replace the oil pump See in Op. 1084B10 ENGINE OIL PUMP - R.R. with crankcase sump removed
3	LUBRICATION SYSTEM CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check: the seal of the crankshaft duct plugs; the main journal/crankcase bearing clearance	Move on to Step	1. Plugs faulty	1. Replace the plugs See in Op. 1024A20 Crankshaft PLUGS, removed - Replace and wash inside of shaft ducts
		Move on to Step	2. Clearance too large	2. Restore correct values
4	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present		Fault persists	Continue following the instructions in Table K109

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