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2024 MINI COOPER SE
Electric•FWD•AUTOMATIC•ev
2 active safety recalls on this vehicle — view recalls
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Repairs0Labor318Torque4657Fluid5DTC754Battery1Maintenance0Recalls2
29E0moderate severityPowertrain

Lambda Additive/Idle Adaptation Limit, Bank 1

on 2024 Mini Cooper SE Electric · FWD

What this code means

The engine's long-term fuel trim at idle/additive range has hit its correction limit on bank 1, meaning the mixture is too lean or too rich (OBD P0170). The ECU can no longer compensate for the air/fuel imbalance.

Symptoms

  • Rough idle
  • Check engine light
  • Poor fuel economy

Common causes

  • Vacuum/intake air leak
  • Faulty MAF sensor
  • Leaking or dirty fuel injectors
  • Faulty oxygen sensor

Diagnostic steps

  1. Read fuel trim values with scan tool
  2. Smoke test intake for leaks
  3. Inspect MAF sensor readings
  4. Check fuel pressure and injectors
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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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