Checking oil pressure and oil pressure switch (engine code CCZA) — VW

🧭 Before you start

Fits: platform codes 5C7, 5C1

• Renewed: oil pump, oil pressure switch

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• During the first 1000 km the oil pressure could be 3.0 to 4.0 bar at 2000 rpm.
• Mechanical damage, e.g. to bearings, could also be the cause for oil pressure being too low.
• Start engine. At 0.55…0.85 bar, the LED must light up, otherwise renew oil pressure switch.
• Start engine and increase engine speed. At 2.15…2.95 bar, the LED must light up, otherwise renew oil pressure switch.

🔧 Engine codes this applies to

📐 67 workshop diagrams for CCZA

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

📋 Procedure

1. Separate electrical connector (2) on oil pressure switch for reduced oil pressure F378 (brown).
2. Unscrew oil pressure switch for reduced oil pressure F378(1).
3. Screw oil pressure testerV.A.G 1342 into oil filter bracket in place of oil pressure switch.
4. Screw oil pressure switch for reduced oil pressure F378 into oil pressure testerV.A.G 1342.
5. Reconnect charge air pipe and breather line for activated charcoal filter.

6. Start engine. [Note: During the first 1000 km the oil pressure could be 3.0 to 4.0 bar at 2000 rpm.]
7. Check strainer in oil suction pipe for contamination/soiling .
8. Check valve for oil pressure control N428 with vehicle diagnosis tester. [Note: Mechanical damage, e.g. to bearings, could also be the cause for oil pressure being too low.]
9. Renew oil pump .
10. Stop engine.
11. Connect brown wire of tester to earth (-).
12. 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.
13. If LED lights up, replace oil pressure switch for reduced oil pressure F378.
14. Start engine. At 0.55…0.85 bar, the LED must light up, otherwise renew oil pressure switch.
15. Stop engine.
16. Connect voltage testerV.A.G 1527B to battery positive (+) and oil pressure switch F22 (blue) using cables from auxiliary test setV.A.G 1594C.
17. If LED lights up, replace pressure switch F22.
18. Start engine and increase engine speed. At 2.15…2.95 bar, the LED must light up, otherwise renew oil pressure switch.

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