P0141
O2 Heater Circuit Malfunction (Bank 1 Sensor 2)
System: Emissions
Severity: medium
What does P0141 mean?
The DTC P0141 (O2 Heater Circuit Malfunction (Bank 1 Sensor 2)) is a fault code stored by the ECU when it detects a O2 heater B1S2 condition in the emissions subsystem. It is commonly seen on European and Asian vehicles using Bosch, Continental, Siemens or Denso ECUs.
Common causes of P0141
- Failed downstream sensor heater
- Wiring fault
- Connector corroded
How to fix P0141
Resistance check downstream sensor. P0141 is very common — usually just replace the sensor.
Tuning approach with DaVinci Deluxe
For P0141, DaVinci Deluxe offers the following ECU map adjustments and software solutions:
- Post-cat O2 monitor disable (decat cars)
Need to fix P0141 on your ECU?
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