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2010 MINI COOPER
1.6L I4•FWD•AUTOMATIC•gas
2 active safety recalls on this vehicle — view recalls
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Repairs0Labor551Torque4624Fluid6DTC898Battery1Maintenance0Recalls2
P1085moderate severityPowertrain

Fuel Control Mixture Lean Bank 2

on 2010 Mini Cooper 1.6L I4 · FWD

What this code means

The DME detected a lean fuel mixture condition on Bank 2 beyond the correction capability of the long-term fuel trim. This often accompanies P1083 on V-configuration engines but can appear independently on Bank 2.

Symptoms

  • Check Engine Light
  • Rough idle
  • Lean misfire under load
  • Hesitation
  • Poor fuel economy

Common causes

  • Vacuum leak on Bank 2 intake side
  • Weak or clogged fuel injectors Bank 2
  • Low fuel pressure
  • Faulty MAF sensor
  • Intake manifold gasket leak Bank 2

Diagnostic steps

  1. Smoke test for vacuum leaks focusing on Bank 2
  2. Compare fuel trims Bank 1 vs Bank 2
  3. Test fuel pressure and volume
  4. Inspect intake manifold gasket
  5. Test individual injector flow rates

Repair notes

Repair vacuum leaks or fuel delivery issues on Bank 2 side.

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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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