What does code P1221 mean?

Q: What does code P1221 mean?

Pedal Demand Sensor B Circuit Range Performance. P1221 on a Jaguar indicates that the engine control module (ECM) has detected an out-of-range performance from the pedal demand sensor B circuit, which is the second track of the accelerator pedal position sensor. The ECM compares the two sensor signals for plausibility and sets this code when the B circuit voltage or its correlation with the A circuit falls outside the expected range.

DTC codes / Jaguar codes / P1221

P1221 · JaguarPedal Demand Sensor B Circuit Range Performance

P1221 on a Jaguar indicates that the engine control module (ECM) has detected an out-of-range performance from the pedal demand sensor B circuit, which is the second track of the accelerator pedal position sensor. The ECM compares the two sensor signals for plausibility and sets this code when the B circuit voltage or its correlation with the A circuit falls outside the expected range.

SystemPowertrain

Code typeJaguar specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

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