Audi DTC P1557 – Charge Pressure Control Positive Deviation
DTC P1557 meaning on Audi
The DTC P1557 on an Audi refers to “Charge Pressure Control Positive Deviation.” This diagnostic trouble code indicates that the engine control module (ECM) has detected a deviation in the positive direction from the specified boost pressure target.
Audi DTC P1557 symptoms
Symptoms of DTC P1557 on an Audi may include:
- Reduced engine power
- Check Engine Light (CEL) illuminated
- Engine running rough or misfiring
- Increased fuel consumption
Audi DTC P1557 causes
Common causes of DTC P1557 on an Audi include:
- Boost pressure sensor malfunction
- Wastegate stuck open or closed
- Boost pressure control valve failure
- Leak in the intake system
Audi DTC P1557 seriousness
The seriousness of DTC P1557 on an Audi depends on the underlying cause. Ignoring this fault code can lead to reduced engine performance, potential engine damage, and increased fuel consumption. It is recommended to address this issue promptly to prevent further complications.
How to diagnose DTC P1557 on Audi
To diagnose DTC P1557 on an Audi, you can perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the boost pressure sensor and wiring for any damage
- Check the wastegate operation and control valve
- Perform a boost pressure test to identify any leaks
How to fix DTC P1557 on Audi
To fix DTC P1557 on an Audi, you may need to:
- Replace the faulty boost pressure sensor
- Repair or replace the wastegate if stuck
- Replace the boost pressure control valve if defective
- Repair any leaks in the intake system
How to erase DTC P1557 on Audi
To erase DTC P1557 on an Audi, you can:
- Use a diagnostic scanner to clear the fault codes
- After fixing the underlying issue, drive the vehicle to allow the ECM to relearn
- Ensure the Check Engine Light is no longer illuminated
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.