What does code P1646 mean?

Q: What does code P1646 mean?

Linear O2 Sensor Control Chip Bank 1. P1646 on a Jaguar indicates that the engine control module (ECM) has detected a fault within the linear oxygen sensor control chip circuit for bank 1, which is the side of the engine containing cylinder number one. The ECM monitors the current driving the sensor's internal heater and pump cell, and when the feedback from the control chip falls outside the expected range, it stores this code and illuminates the check engine light.

DTC codes / Jaguar codes / P1646

P1646 · JaguarLinear O2 Sensor Control Chip Bank 1

P1646 on a Jaguar indicates that the engine control module (ECM) has detected a fault within the linear oxygen sensor control chip circuit for bank 1, which is the side of the engine containing cylinder number one. The ECM monitors the current driving the sensor's internal heater and pump cell, and when the feedback from the control chip falls outside the expected range, it stores this code and illuminates the check engine light.

SystemPowertrain

Code typeJaguar specific

SeverityMedium

Fix difficultyIntermediate

AreaComputer and output circuits

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