Bentley Continental Oil Pressure Problems
Car Maintenance 

Bentley Continental Oil Pressure Problems

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Bentley has identified an issue related to low oil pressure warnings during the early life of certain models, specifically the New Continental GT / GTC, New Flying Spur, and Bentayga Speed. This technical product information provides detailed instructions for diagnosing and addressing these low oil pressure warnings.

Book inspection

Affected Vehicles

Models

  • New Continental GT / GTC (2018-2020)
  • New Flying Spur (2020)
  • Bentayga Speed (2020)

Engine Codes

  • BY634 447/W128AG
  • BY634 467/W128AG
  • BY635 467/W128AG
  • BY636 467/W128AG

Symptoms and Diagnostic Trouble Codes (DTCs)

Symptoms

  • Warning on the Driver Instrument Panel (DIP): “Oil pressure too low”
  • DTCs related to oil pressure stored in the Master ECU

Relevant DTCs

  • P052400: Engine Oil Pressure Too Low
  • P15AA00: Engine Oil Pressure – Lower Limit Not Reached

Diagnostic Instructions

Initial Checks

  1. Customer Complaint Confirmation:
    • Confirm if the low oil pressure warning is displayed on the DIP.
    • Check for stored DTCs: P052400 and/or P15AA00 in the Master ECU.
  2. Repeat Visits:
    • If this is a repeat visit for the same issue, proceed to Step 2.
    • If not, follow all remaining instructions to completion.

Diagnostic Steps

  1. Vehicle Diagnostic Log:
    • Use the Bentley-approved diagnostic tool to take a vehicle diagnostic log and attach it to the DISS query.
    • Read and record Measured Values IDE02756 (Number of manual engine starts) and IDE02757 (Number of automatic engine starts) for Continental and Flying Spur series vehicles.
  2. Engine Lubricating Oil Level and Pressure Check:
    • Check and confirm the engine oil level.
    • Measure the actual engine oil pressure at 600 rpm (idle) and 2000 rpm.
      • Minimum Oil Pressure at 600 rpm: 1.3 bar (+/- 0.3 bar)
      • Minimum Oil Pressure at 2000 rpm: 1.6 bar (+/- 0.3 bar)
  3. Road Test:
    • If oil pressure is within acceptable limits, conduct a road test of at least 30 km (18.6 miles).
    • Drive the vehicle until the engine coolant reaches 90°C.
    • Perform specific acceleration cycles to test oil pump functionality.

Further Diagnosis if Issue Persists

  1. Engine Oil and Filter Replacement:
    • Drain the engine oil through a fine gauze filter and inspect for contaminants or particles.
    • Replace the oil and filter, retaining any contaminants for possible analysis.
  2. Oil Pressure Control Valve Examination:
    • Remove and inspect the Valve for Oil Pressure Control (N428) for signs of contamination, debris, or damage.
  3. Additional Road Test:
    • Repeat the road test as described above to confirm if the low oil pressure warning is resolved.

Warranty Accounting Instructions

Labour Operation Codes

  • ODIS Diagnostic Log: 01 50 00 00 (Time taken from ODIS log)
  • ODIS Measured Values Read: 01 50 00 00 (Time taken from ODIS log)
  • Engine Oil Level Check:
    • 12-cylinder, Petrol engine – Dipstick: 17 01 01 01 (10 TU)
    • Infotainment Touch Screen: 17 01 01 02 (10 TU)
  • Oil Pressure Check: 17 03 01 50 (10 TU)
  • Engine Oil and Oil Filter Change:
    • New Continental GT / GTC / New Flying Spur: 17 01 17 00 (140 TU)
    • Bentayga: 17 01 17 00 (90 TU)
  • Road Test: 01 21 00 00 (50 TU)
  • Oil Control Valve Removal and Refit:
    • Including front-end module service: 17 05 19 00 / 50 38 09 00 (100 TU / 550 TU)

Conclusion

For Bentley vehicles experiencing low oil pressure warnings, it is crucial to follow the diagnostic and repair procedures outlined in this document. By adhering to these steps, technicians can accurately diagnose and resolve oil pressure issues, ensuring the reliability and performance of Bentley’s luxury vehicles.

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