What does code P1126 mean?

Q: What does code P1126 mean?

Long Term Fuel Trim Add Air Bank 2 System Too Lean. P1126 on Volkswagen vehicles means the engine control module has detected a lean condition on bank 2 that the long-term fuel trim has added more than its calibrated limit of air to correct. The computer is reporting that the oxygen sensor on bank 2 is consistently seeing too much oxygen in the exhaust, and the fuel injection duration has been increased to the maximum long-term adjustment without bringing the mixture back to stoichiometric.

DTC codes / Volkswagen codes / P1126

P1126 · VolkswagenLong Term Fuel Trim Add Air Bank 2 System Too Lean

P1126 on Volkswagen vehicles means the engine control module has detected a lean condition on bank 2 that the long-term fuel trim has added more than its calibrated limit of air to correct. The computer is reporting that the oxygen sensor on bank 2 is consistently seeing too much oxygen in the exhaust, and the fuel injection duration has been increased to the maximum long-term adjustment without bringing the mixture back to stoichiometric.

SystemPowertrain

Code typeVolkswagen specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering

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