What exactly does restricted performance/engine fail safe mean?
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I know "restricted performance" is triggered with some DTCs but not others. I ask because I have had the fault with no noticeable performance deficit, while I've had a actual performance reduction (dirty MAF sensor) and "restricted performance" was never displayed.
Is it anything specific like ignition timing retardation? Worse fuel economy? Emissions? O2 sensor and other sensor reading not in the ECU map or etc?![Icon Shrug](https://www.jaguarforums.com/forum/images/smilies/icon_shrug.gif)
What has caused "restricted performance" to be displayed for you? Mine has been a vacuum leak.
I have had "engine fail safe" for an electrical throttle body connection problem, and I had it another time when my car ran very low on gas and was burning mainly fuel injector cleaner.
Is it anything specific like ignition timing retardation? Worse fuel economy? Emissions? O2 sensor and other sensor reading not in the ECU map or etc?
![Icon Shrug](https://www.jaguarforums.com/forum/images/smilies/icon_shrug.gif)
What has caused "restricted performance" to be displayed for you? Mine has been a vacuum leak.
I have had "engine fail safe" for an electrical throttle body connection problem, and I had it another time when my car ran very low on gas and was burning mainly fuel injector cleaner.
![Icon Doh](https://www.jaguarforums.com/forum/images/smilies/icon_doh.gif)
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