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When the CEL light is turned on by the on board computer system it means a fault has occurred in the system it monitors and or controls. You must have the fault code read with a special tool called a scanner to see what fault has occurred and then do the diagnostics to repair it.
What is the fault code in the transmission control modules memory, if the light is on the code must be read with a special scan tool through the vehicles diagnostic service port.
You have a fault condition in the the engine management system - get the codes read to indicate where the fault lies ... It is probably just a faulty sensor as this is the most common cause of check engine warnings. The restricted performance condition is meant to protect the engine or components from damage, so don't panic - get the codes read - its probably not as bad as you expect.
hope this helps - good luck.
jaguar x-type 2ltr diesel 2004 the glow plug warning light flashing, was told dirty fuel on fault code all fuel changed and filters. No problems for 20 miles untill engine was put under power on high revs went into limp mode, warning light glow plug falshing again? any ideas thanks.
My records show that P1796 Fault indicates a Kick Down Switch Circuit Malfunction, however there appears to be some discrepency here as other records show it as a CAN bus (off) fault. A quick check to see if your car will go into kickdown should identify which is which. Clear the fault then drive gently for 20-30 miles, if no engine light then use the kickdown and see if it comes on. You can check out other fault codes at http://www.bluejag.co.uk.
The best thing to do is go to an exhaust specialist, who can check the catylitic converter and also the oxygen sensors. You will need to replace these items if they are at fault. Hope this helps
Hi, the problem is, your throttle body is restricting the air flow to the engine due to carbon buildup, simply remove the complete throttle body and clean it very good and reinstall, your problem will be solved for sure.
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