Land Rover DTC P0139 – Oxygen Sensor Slow Response *Codes* A D
DTC P0139 meaning on Land Rover
DTC P0139 on a Land Rover indicates an Oxygen Sensor Slow Response in Bank 1 Sensor 2. This means that the downstream oxygen sensor located after the catalytic converter is not responding as quickly as expected to changes in the exhaust oxygen levels.
Land Rover DTC P0139 symptoms
Symptoms of DTC P0139 on a Land Rover may include:
- Check Engine Light illuminated
- Poor fuel economy
- Rough idling
- Engine hesitation
Land Rover DTC P0139 causes
Common causes of DTC P0139 on a Land Rover include:
- Faulty oxygen sensor
- Wiring or connector issues
- Exhaust leaks
- Catalytic converter problems
Land Rover DTC P0139 seriousness
While DTC P0139 may not cause immediate drivability issues, it can lead to decreased fuel efficiency and potentially harm the catalytic converter over time if left unresolved.
How to diagnose DTC P0139 on Land Rover
To diagnose DTC P0139 on a Land Rover, you can:
- Use an OBD-II scanner to retrieve the fault code
- Inspect the wiring and connectors of the downstream oxygen sensor
- Check for exhaust leaks near the sensor
- Perform a visual inspection of the catalytic converter
How to fix DTC P0139 on Land Rover
To fix DTC P0139 on a Land Rover, you may need to:
- Replace the downstream oxygen sensor
- Repair any damaged wiring or connectors
- Fix any exhaust leaks
- Replace the catalytic converter if necessary
How to erase DTC P0139 on Land Rover
After fixing the underlying issue causing DTC P0139 on a Land Rover, you can erase the fault code by:
- Using an OBD-II scanner to clear the code
- Driving the vehicle through a complete drive cycle to ensure the code does not return
Recommended tools for Land Rover diagnostics
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