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Ask Chad Farhat Your Own Question
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Jaguar
Satisfied Customers: 3799
Experience:  Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehciles
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Restricted performance light is on, also the check engine

Customer Question

restricted performance light is on , also the check engine light . what's up
JA: I'm good. And you?
Customer: can u see me ?
JA: Does the light stay on, or does it blink?
Customer: engine light stays on and restricted performance light just came on today
JA: What is the model/year of your Jaguar?
Customer: xj sport 2002
JA: Are you fixing your XJ Sport yourself? What have you tried so far?
Customer: nothing need guiddance or advice
JA: Anything else you want the mechanic to know before I connect you?
Customer: no the car performs fine but an ounce is worth....
Submitted: 12 months ago.
Category: Jaguar
Expert:  Chad Farhat replied 12 months ago.

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

Expert:  Chad Farhat replied 12 months ago.

1- has it been tuned up , plugs & coils ?

2- on the XJ the restricted performance , means it since a misfire .

most common reason , if it has been tuned up and still does it ,

1-will be intake manifold gasket leak

2- mass air flow sensor

3- throttle body

4- if you have it scanned with a jag or equivalent scanner we can retrieve the fault codes and be more accurate ?

Please let me know

Thank You

Chad Farhat

ASE Certified Technician

Expert:  Chad Farhat replied 11 months ago.

Please let me know if you need anything else on it, just reply back and we will continue

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Thank You
Chad Farhat
ASE Certified Technician