What does code P1190 mean?

Q: What does code P1190 mean?

Pre-Catalyst Fuel Trim System Bank 1. P1190 on BMW vehicles indicates that the engine control module (ECM) has detected an out-of-range fuel trim correction specifically for the pre-catalyst (upstream) oxygen sensor on bank 1. The ECM monitors the short-term and long-term fuel trim values and sets this code when the required correction exceeds a calibrated threshold, signaling a rich or lean condition that the system cannot adequately compensate for.

DTC codes / BMW codes / P1190

P1190 · BMWPre-Catalyst Fuel Trim System Bank 1

P1190 on BMW vehicles indicates that the engine control module (ECM) has detected an out-of-range fuel trim correction specifically for the pre-catalyst (upstream) oxygen sensor on bank 1. The ECM monitors the short-term and long-term fuel trim values and sets this code when the required correction exceeds a calibrated threshold, signaling a rich or lean condition that the system cannot adequately compensate for.

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.