What does code P1127 mean?

Q: What does code P1127 mean?

Long Term Fuel Trim Multiplicative Air System Low. P1127 on a Kia indicates that the engine control module (ECM) has detected a long-term fuel trim value that is excessively lean in the multiplicative (high-load) range, meaning the engine is receiving too much air or too little fuel under heavier throttle conditions. The ECM has reached the limit of its ability to add fuel and still cannot achieve the target air-fuel ratio, so it sets this code and often illuminates the check engine light.

DTC codes / Kia codes / P1127

P1127 · KiaLong Term Fuel Trim Multiplicative Air System Low

P1127 on a Kia indicates that the engine control module (ECM) has detected a long-term fuel trim value that is excessively lean in the multiplicative (high-load) range, meaning the engine is receiving too much air or too little fuel under heavier throttle conditions. The ECM has reached the limit of its ability to add fuel and still cannot achieve the target air-fuel ratio, so it sets this code and often illuminates the check engine light.

SystemPowertrain

Code typeKia specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering

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