P0141: Circuit de chauffage de sonde lambda (Ligne 1 Capteur 2)
Circuit de chauffage de sonde lambda (Ligne 1 Capteur 2) : Downstream oxygen sensor heater circuit current out of normal range.
| Trouble Code (DTC) | P0141 |
|---|---|
| Official SAE Definition | Circuit de chauffage de sonde lambda (Ligne 1 Capteur 2) |
| Vehicle Subsystem | powertrain |
| Driving Severity | LOW |
Observable Symptoms
- MIL illuminated
- No noticeable drivability change
Most Probable Root Causes
- Burned-out heater element in downstream O2 sensor
- Corroded underbody connector or blown fuse
Step-by-Step Diagnostic Procedure
- Verify +12 V power and ground at rear O2 sensor harness
- Measure heater resistance and replace downstream sensor if open