Audi DTC P1140 – Bank2-Sensor2 Internal Resistance too High
DTC P1140 meaning on Audi
DTC P1140 on an Audi indicates that the internal resistance of Bank 2 Sensor 2 is too high. This means that the oxygen sensor located downstream of the catalytic converter on the second bank of cylinders is not functioning within the expected parameters.
Audi DTC P1140 symptoms
Symptoms of DTC P1140 on an Audi may include poor fuel economy, rough idling, hesitation during acceleration, and an illuminated check engine light on the dashboard.
Audi DTC P1140 causes
The high internal resistance of Bank 2 Sensor 2 in an Audi can be caused by a faulty oxygen sensor, wiring issues, or problems with the engine control module (ECM).
Audi DTC P1140 seriousness
While DTC P1140 may not cause immediate drivability issues, it can lead to decreased fuel efficiency and increased emissions. Ignoring this fault code can potentially cause damage to the catalytic converter over time.
How to diagnose DTC P1140 on Audi
To diagnose DTC P1140 on an Audi, a mechanic would typically use a diagnostic scanner to retrieve the fault code and then perform a visual inspection of the oxygen sensor and its wiring. Testing the sensor’s resistance and checking for any voltage irregularities can help pinpoint the issue.
How to fix DTC P1140 on Audi
Fixing DTC P1140 on an Audi usually involves replacing the Bank 2 Sensor 2 oxygen sensor. It is important to use a high-quality OEM or equivalent sensor to ensure proper functionality. Additionally, checking and repairing any damaged wiring or addressing ECM issues can help resolve the problem.
How to erase DTC P1140 on Audi
Once the underlying issue causing DTC P1140 on an Audi has been fixed, the fault code can be cleared using a diagnostic scanner. This will reset the check engine light and allow the vehicle’s ECM to monitor the system for any new faults.
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