Checking oil pressure and oil pressure switch (single pin oil pressure switch) — VW

🧭 Before you start

Fits: VW Golf V / Jetta (1K, 2003–2009), VW Passat B6 (3C, 2005–2010); platform code 1F7

• Renewed: oil pressure switch, oil pump

Don't miss

• Connect voltage testerV.A.G 1527 B to battery positive (+) and oil pressure switch using cable from auxiliary measuring setV.A.G 1594C. LED must not light up.
• Start engine and increase engine speed. At 1.2…1.6 bar, the LED must light up, otherwise renew oil pressure switch.
• Mechanical damage, e.g. to bearings, could also be the cause for oil pressure being too low.

🔧 Engine codes this applies to

📋 Procedure

1. Remove oil pressure switch F1 and screw it into tester.
2. Screw tester into oil filter bracket in place of oil pressure switch.
3. Connect brown wire of tester to earth (-).
4. Connect voltage testerV.A.G 1527 B to battery positive (+) and oil pressure switch using cable from auxiliary measuring setV.A.G 1594C. LED must not light up.
5. If the LED lights up, renew 1.4 bar oil pressure switch F1.

6. Start engine and increase engine speed. At 1.2…1.6 bar, the LED must light up, otherwise renew oil pressure switch.
7. Increase engine speed further. At 2,000 rpm and an oil temperature of 80°C, the oil pressure should be between 2.7…4.5 bar.
8. Check strainer in oil suction pipe for contamination/soiling . [Note: Mechanical damage, e.g. to bearings, could also be the cause for oil pressure being too low.]
9. Renew oil pump and balance shaft gear assembly .
10. Check oil channels.
11. If necessary, renew oil filter bracket with pressure relief valve.

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