Jaguar XE Won't Start After Fuel System Service Fix

Experienced a similar starting issue on my Jaguar XF 2020 Diesel. After engine software updates and fuel system work, the check engine light stayed on and the car refused to start. The root cause turned out to be corroded battery terminals and loose connections affecting the ECU communication. The solution required cleaning the battery terminals, replacing damaged cable connectors, and performing a full ECU reset. This is actually a common issue when battery connections are disturbed during other repair work. The engine stalling and starting problems occur because the ECU receives inconsistent power supply. While engine software updates can sometimes cause issues, it's often the physical connections that need attention first. Would suggest having the battery connections and ground points checked before switching mechanics, these are basic checks that should be done before diving into more complex diagnostics. This was a serious issue that could have damaged the ECU if left unaddressed, but the fix itself was straightforward once properly diagnosed. The original mechanic might not be at fault, as these symptoms can appear gradually after any work involving the battery disconnect.

I had the exact same problem with my XE last spring. The ECU failure symptoms showed up right after a routine service where they did some updates. After getting a second opinion, they found that worn fuel injection components were causing the ECU issue. The engine stalling completely was just like what you described. Did you manage to get it fully fixed with your mechanic? And if you did, would you mind sharing what the repair ended up costing? Just curious if similar to what I paid, plus wondering if youve had any other issues pop up since the repair? Always good to know what to watch out for with these engine software related problems.

Had the car checked again yesterday and thankfully the engine control malfunction is now completely resolved. The root cause was exactly as suspected, faulty battery cable connections that were causing irregular power supply to the ECU. The repair cost came to 155€ for cleaning, replacing damaged connectors, and properly securing all battery connections. The check engine light disappeared immediately after the fix, and the car starts perfectly now. Since the repair, there have been zero engine stalling issues or ECU-related problems. The mechanic explained that poor battery connections can trigger various ECU failure symptoms, making diagnosis tricky if you dont check the basics first. No additional issues have appeared since the fix. The key was addressing the actual hardware problem rather than just focusing on the software side. When the ECU gets inconsistent power, it can trigger all sorts of false readings that make the engine act up.

Thanks for the input. Just wanted to update on what happened with my car. Took it to a different repair shop and finally got it sorted. The check engine light issue turned out to be related to a failed sensor that was missed during the previous work. The new mechanic found the engine surge was happening because the previous software update wasnt properly configured. They had to redo the ECU programming and replace the faulty sensor. Total bill came to 380€, not cheap but worth it to have the car running properly again. Been driving it for about 2 weeks now with no issues. The car starts right up every time and runs smooth. Really glad I decided to get that second opinion since the first shop kept missing the real problem. The new place did a full diagnostic scan which caught things the other shop missed. Going forward, will definitely stick with this new mechanic. They took the time to properly check all systems instead of just guessing at the problem. Lesson learned about getting a specialist when dealing with engine software and ECU issues.