What does code P1153 mean?

Q: What does code P1153 mean?

O2 Sensor Heater Circuit High Voltage Bank 2 Sensor 1. P1153 on a BMW indicates that the engine control module (DME) has detected an abnormally high voltage on the heater circuit of the pre-catalyst oxygen sensor on bank 2, sensor 1. The DME monitors the current flow through the sensor heater and flags this code when the circuit voltage exceeds the expected range, typically because the heater element has failed open or the wiring has a short to voltage.

DTC codes / BMW codes / P1153

P1153 · BMWO2 Sensor Heater Circuit High Voltage Bank 2 Sensor 1

P1153 on a BMW indicates that the engine control module (DME) has detected an abnormally high voltage on the heater circuit of the pre-catalyst oxygen sensor on bank 2, sensor 1. The DME monitors the current flow through the sensor heater and flags this code when the circuit voltage exceeds the expected range, typically because the heater element has failed open or the wiring has a short to voltage.

SystemPowertrain

Code typeBMW specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering

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