Chrysler DTC P1299 – Vacuum Leak Found (IAC Fully Seated)
DTC P1299 meaning on Chrysler
DTC P1299 on a Chrysler indicates a vacuum leak has been detected while the Idle Air Control (IAC) valve is fully seated. This means that there is a discrepancy between the expected and actual vacuum levels in the intake system when the IAC valve is supposed to be closed.
Chrysler DTC P1299 symptoms
- Check Engine Light (CEL) illuminated on the dashboard
- Engine may idle erratically or stall
- Reduced engine performance
- Possible hissing or sucking noise from the engine bay
Chrysler DTC P1299 causes
- Vacuum leak in the intake system
- Faulty Idle Air Control (IAC) valve
- Cracked or disconnected vacuum hoses
- Intake manifold gasket leak
Chrysler DTC P1299 seriousness
The seriousness of DTC P1299 on a Chrysler depends on the extent of the vacuum leak and the impact it has on engine performance. Ignoring this issue can lead to further engine problems and decreased fuel efficiency.
How to diagnose DTC P1299 on Chrysler
- Perform a visual inspection of vacuum hoses and connections
- Use a smoke machine to detect vacuum leaks
- Check the IAC valve operation and wiring
- Inspect the intake manifold gasket for leaks
How to fix DTC P1299 on Chrysler
- Repair or replace any damaged vacuum hoses
- Replace the faulty Idle Air Control (IAC) valve
- Repair or replace the intake manifold gasket if necessary
- Clear any debris or obstructions in the intake system
How to erase DTC P1299 on Chrysler
- Use an OBD-II scanner to clear the diagnostic trouble code
- Ensure the underlying issue causing the DTC has been resolved
- Perform a test drive to verify the repair and ensure the code does not return
Recommended tools for Chrysler 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.