Audi DTC P1152 – Bank1, Long Term Fuel Trim, Range 2 Leanness Lower Limit Exceeded
DTC P1152 meaning on Audi
DTC P1152 on an Audi indicates that the Long Term Fuel Trim for Bank 1 has exceeded the lower limit for leanness in Range 2. This means that the engine control module (ECM) has detected a significant deviation from the ideal air-fuel ratio in the long term, leading to a lean condition in the fuel mixture.
Audi DTC P1152 symptoms
Symptoms of DTC P1152 on an Audi may include:
- Check Engine Light (CEL) illuminated on the dashboard
- Decreased fuel efficiency
- Engine running rough or misfiring
- Reduced engine performance
Audi DTC P1152 causes
The possible causes of DTC P1152 on an Audi include:
- Vacuum leaks in the intake system
- Faulty oxygen sensor (Bank 1 Sensor 1)
- Fuel system issues such as low fuel pressure or clogged fuel injectors
- Air intake system restrictions
- Exhaust system leaks
Audi DTC P1152 seriousness
While DTC P1152 may not cause immediate drivability issues, it can lead to long-term engine damage if left unresolved. Running too lean can result in increased combustion temperatures, potentially causing damage to the engine components over time.
How to diagnose DTC P1152 on Audi
To diagnose DTC P1152 on an Audi, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes and freeze frame data
- Inspect the intake system for vacuum leaks
- Check the oxygen sensor readings using a scan tool
- Test the fuel pressure and fuel injectors for proper operation
- Inspect the air intake system for restrictions
- Check for exhaust leaks
How to fix DTC P1152 on Audi
To fix DTC P1152 on an Audi, the following steps may be taken:
- Repair any vacuum leaks in the intake system
- Replace the faulty oxygen sensor (Bank 1 Sensor 1)
- Address any fuel system issues such as low fuel pressure or clogged injectors
- Clean or replace air filters to ensure proper airflow
- Fix any exhaust system leaks
How to erase DTC P1152 on Audi
After fixing the underlying issue causing DTC P1152 on an Audi, the fault code can be erased using a diagnostic scanner. This will reset the Check Engine Light and clear the code from the ECM’s memory. It is important to ensure that the repair has been successful before clearing the code to prevent it from reoccurring.
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