What does code P1133 mean?

Q: What does code P1133 mean?

Bank 1 Fuel Control Shifted Lean. P1133 on a Ford means the powertrain control module (PCM) has detected that the bank 1 fuel control has shifted lean beyond its calibrated limit, meaning the oxygen sensor on the bank containing cylinder one is reporting a persistent lean condition that the computer cannot fully correct. The PCM monitors the long-term fuel trim and sets this code when the adaptive correction needed to keep the air-fuel ratio at stoichiometry exceeds a factory threshold for a calibrated time.

DTC codes / Ford codes / P1133

P1133 · FordBank 1 Fuel Control Shifted Lean

P1133 on a Ford means the powertrain control module (PCM) has detected that the bank 1 fuel control has shifted lean beyond its calibrated limit, meaning the oxygen sensor on the bank containing cylinder one is reporting a persistent lean condition that the computer cannot fully correct. The PCM monitors the long-term fuel trim and sets this code when the adaptive correction needed to keep the air-fuel ratio at stoichiometry exceeds a factory threshold for a calibrated time.

SystemPowertrain

Code typeFord specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering

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