What does code P1165 mean?

Q: What does code P1165 mean?

Fuel Trim Adaptation Additive Per Ignition Bank 2 High. P1165 on BMW vehicles means the engine computer has detected that the additive fuel trim adaptation for bank 2 has exceeded its high limit, indicating a persistent lean condition that the system can no longer correct. The additive trim affects fuel delivery at idle and low load, so the computer is adding extra fuel beyond its normal range on the bank that contains cylinders 2 through 4 on most BMW inline-six engines.

DTC codes / BMW codes / P1165

P1165 · BMWFuel Trim Adaptation Additive Per Ignition Bank 2 High

P1165 on BMW vehicles means the engine computer has detected that the additive fuel trim adaptation for bank 2 has exceeded its high limit, indicating a persistent lean condition that the system can no longer correct. The additive trim affects fuel delivery at idle and low load, so the computer is adding extra fuel beyond its normal range on the bank that contains cylinders 2 through 4 on most BMW inline-six engines.

SystemPowertrain

Code typeBMW specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering

Guidance is general and written for BMW vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.