Checking oil pressure — AUDI

🧭 Before you start

Fits: VW Caddy IV (SA, 2015–2020)

• Renewed: oil pump, oil pressure switch

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• Mechanical damage, e.g. to bearings, could also be the cause for oil pressure being too low.
• Start engine: At 0.3 … 0.6 bar the LED must light up, otherwise renew oil pressure switch.
• Start engine and increase engine speed: at pressure of 2.15 … 2.95 bar LED must light up, otherwise renew oil pressure switch.

🔧 Engine codes this applies to

📐 20 workshop diagrams for AJK

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

1. Remove oil pressure switch for reduced oil pressure F378.
2. Screw oil pressure testerV.A.G 1342 into hole for oil pressure switch.
3. Screw oil pressure switch for reduced oil pressure F378 into hole in oil pressure testerV.A.G 1342 to seal it.
4. Start engine.
5. Switch off engine.

6. Separate electrical connector from valve for oil pressure control N428.
7. Start engine.
8. Increase engine revs to 3800 rpm and read off oil pressure on the oil pressure testerV.A.G 1342.
9. Connect electrical connection to oil pressure control valve N428.
10. Interrogate event memory of engine control unit and delete all event entries Vehicle diagnostic tester.
11. Check valve for oil pressure control N428 with vehicle diagnostic tester. [Note: Mechanical damage, e.g. to bearings, could also be the cause for oil pressure being too low.]
12. Renew oil pump .
13. Switch off ignition.
14. Connect brown wire of tester to earth (-).
15. Connect voltage testerV.A.G 1527B to battery positive (+) and oil pressure switch for reduced oil pressure F378 (brown) using cables from auxiliary test setV.A.G 1594C.
16. If LED lights up, renew oil pressure switch for reduced oil pressure F378.
17. Start engine: At 0.3 … 0.6 bar the LED must light up, otherwise renew oil pressure switch.
18. Stop engine.
19. Connect voltage testerV.A.G 1527B to battery positive (+) and oil pressure switch F1 (blue) using cables from auxiliary measuring setV.A.G 1594C.
20. If LED lights up, renew oil pressure switch F1.
21. Separate electrical connector from valve for oil pressure control N428.
22. Start engine and increase engine speed: at pressure of 2.15 … 2.95 bar LED must light up, otherwise renew oil pressure switch.
23. Connect electrical connection to oil pressure control valve N428.
24. Install oil pressure switch for reduced oil pressure F378.
25. Interrogate event memory of engine control unit and delete all event entries Vehicle diagnostic tester.

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