The ECU on our cars will also partially close the throttle behind the nearside headlight to cause a vacuum if it is not getting enough exhaust gas - in order to 'suck' more through the EGR. The best thing to do is completely disable it by pulling the vacuum pipe off and plugging it with a bit of artist paintbrush handle or ball bearing. You will get an EML after a while but at least you can compare and contrast, and if you want, you can just unplug and pop the pipe back on and normal service will resume, you don't need to clear the code, but the light will stay on for a few journeys.
Last edited by snapdragon; 30th July 2018 at 03:11 PM.
|