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krisk
Well-Known Member
- Thread starter
- #17
I absolutely love the AWE exhaust. My wife was sitting in the paddock and said she knew each time I was coming down the front straight because of how deep of a tone the exhaust has. She said most of the other cars sound like motorcycles.The factory system is designed with protective logic, and under higher loads, the added backpressure from closed valves can cause the PCM to intervene. This isn't exclusive to aftermarket systems—even the stock exhaust in Quiet Mode can trigger this behavior under the right (or wrong) conditions. It’s essentially the vehicle safeguarding itself from excessive restriction. As OP suggested, removing restriction will clear this CEL right away.
If you’ve got an AWE SwitchPath system and you're dealing with a persistent CEL, our team is here to support. Drop us a line with the specific code and conditions that caused it, and we’ll help troubleshoot from there. No guesswork—just real support from folks who live and breathe this stuff.
https://www.awe-tuning.com/pages/support
Zig
Well-Known Member
^The factory system is designed with protective logic, and under higher loads, the added backpressure from closed valves can cause the PCM to intervene. This isn't exclusive to aftermarket systems—even the stock exhaust in Quiet Mode can trigger this behavior under the right (or wrong) conditions. It’s essentially the vehicle safeguarding itself from excessive restriction. As OP suggested, removing restriction will clear this CEL right away.
If you’ve got an AWE SwitchPath system and you're dealing with a persistent CEL, our team is here to support. Drop us a line with the specific code and conditions that caused it, and we’ll help troubleshoot from there. No guesswork—just real support from folks who live and breathe this stuff.
https://www.awe-tuning.com/pages/support
Was just about to say, that the cel would seem to imply ‘it’ (the tune?) detected an unexpected backpressure anomaly, next stop melted cat (or at least that’s what it’s anticipating). Would it have self cleared when the detected condition changes, run in open exhaust (does it take approximately the same amount of time for it to ‘self adjust’ as it takes to clear emissions test when battery reset is performed?)
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krisk
Well-Known Member
- Thread starter
- #19
I shut the car down and restarted it before I cleared the code, and it did not display the CEL upon restart. I suspect I could have run again in track mode and had no issues even without using Forscan to clear the code.^
Was just about to say, that the cel would seem to imply ‘it’ (the tune?) detected an unexpected backpressure anomaly, next stop melted cat (or at least that’s what it’s anticipating). Would it have self cleared when the detected condition changes, run in open exhaust (does it take approximately the same amount of time for it to ‘self adjust’ as it takes to clear emissions test when battery reset is performed?)
Zig
Well-Known Member
These also might come in handy:The factory system is designed with protective logic, and under higher loads, the added backpressure from closed valves can cause the PCM to intervene. This isn't exclusive to aftermarket systems—even the stock exhaust in Quiet Mode can trigger this behavior under the right (or wrong) conditions. It’s essentially the vehicle safeguarding itself from excessive restriction. As OP suggested, removing restriction will clear this CEL right away.
If you’ve got an AWE SwitchPath system and you're dealing with a persistent CEL, our team is here to support. Drop us a line with the specific code and conditions that caused it, and we’ll help troubleshoot from there. No guesswork—just real support from folks who live and breathe this stuff.
https://www.awe-tuning.com/pages/support
https://www.awe-tuning.com/pages/faq
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krisk
Well-Known Member
- Joined
- Apr 15, 2025
- Threads
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- Messages
- 31
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- 29
- Location
- Horsham PA
- Vehicle(s)
- BMW X5 Msport, Swapped NA Miata, Mk7 GTI, Chevy 1500
A rare (and awesome) moment. Thank you for taking the time to find our FAQ on CEL codes before I had the chance to drop the link!
This is a very informative video for anyone struggling with a CEL. Our support staff can help most effectively when given all of the information possible.
It looks like in this current instance support is not necessary, but for future browsing forum users, this is a great opportunity to learn and help us help you.
Junkyard Dog
Well-Known Member
Wow!
Junkyard Dog
Well-Known Member
Are you talking about AWE or factory?
Is it ok to cruise in quiet mode? My young daughter does not like my Dark Horse due to the noise, so I often hit the Quiet Mode button when she is in the car.
ZXMustang
Well-Known Member
I can only comment on OEM active exhaust and cruising and messing around in quiet is fine. Extended WOT pulls or track duty would be a no for sure.
We can help keep the temps down now since we can tune them by disabling the DFCO or decel fuel cut off. That will keep fuel going into the cylinders when you tip out of the gas pedal at high RPM. That helps keep the pistons cool as well as the cats if you still have them. This is how we keep cats happy for boosted mustangs. DFCO OFF>
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