I have a Jaguar x type 2007.
just had a altenator replaced, new battery.
Check Engine light was cleared.
Now the check engine light is back on.
what should I check now
...........fuses,........regulators.......?

 

Welcome to the forums Schweppes,

The CEL will keep coming back until you fix the cause. The first step in troubleshooting this is to have the DTC's (Diagnostic Trouble Codes) read. Throwing parts at a Jaguar soon becomes very expensive and the error code(s) will help you identify which need repair or replacement.

Please follow this link New Member Area - Intro a MUST - Jaguar Forums - Jaguar Enthusiasts Forum to the New Member Area - Intro a MUST forum and post some information about yourself and your vehicle for all members to see. In return you'll get a proper welcome and some useful advice about posting to the forum.

Graham