Audi DTC P1146 – Mass or Volume Air Flow Circ Supply Malfunction
DTC P1146 meaning on Audi
The Diagnostic Trouble Code (DTC) P1146 for Audi indicates a Mass or Volume Air Flow Circ Supply Malfunction. This means that there is an issue with the supply of air flow to the engine, which can affect the performance and efficiency of the vehicle.
Audi DTC P1146 symptoms
Symptoms of DTC P1146 on an Audi may include:
- Reduced engine power
- Poor fuel efficiency
- Engine stalling or hesitation
- Check Engine Light illuminated on the dashboard
Audi DTC P1146 causes
Common causes of DTC P1146 on an Audi include:
- Dirty or clogged air filter
- Faulty mass air flow sensor
- Vacuum leaks in the air intake system
- Issues with the air flow meter circuit
Audi DTC P1146 seriousness
The seriousness of DTC P1146 on an Audi depends on the underlying cause. Ignoring this issue can lead to poor engine performance, reduced fuel efficiency, and potential damage to other engine components over time. It is recommended to address this code promptly to prevent further issues.
How to diagnose DTC P1146 on Audi
To diagnose DTC P1146 on an Audi, a mechanic may perform the following steps:
- Scan the vehicle’s onboard computer for fault codes
- Inspect the air filter for dirt or clogs
- Check the mass air flow sensor for proper operation
- Inspect the air intake system for vacuum leaks
- Test the air flow meter circuit for continuity
How to fix DTC P1146 on Audi
To fix DTC P1146 on an Audi, the following steps may be taken:
- Replace the air filter if dirty or clogged
- Replace the mass air flow sensor if faulty
- Repair any vacuum leaks in the air intake system
- Check and repair any issues with the air flow meter circuit
- Clear the fault code and reset the Check Engine Light
How to erase DTC P1146 on Audi
To erase DTC P1146 on an Audi, the fault code can be cleared using an OBD-II scanner or diagnostic tool. Once the underlying issue has been addressed and fixed, the code can be cleared to reset the Check Engine Light and ensure that the vehicle is running smoothly.
Recommended tools for Audi diagnostics
Explore our expert picks: The Best OBD2 Scanners for 2025
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.