Seeking Advice: Overheating Issue and Flashing Check Engine Light on Diesel 2008 Volvo S40

Hey, Funny enough I had a similar issue with my Diesel 2007 Volvo S60 not too long ago. Started acting up with overheating and that pesky engine light wouldn't stop blinking at me. Thought it was the coolant pump at first myself, just like you. But turned out to be a defective cable on the pump/control unit. When I had it checked out at the garage, they managed to quickly diagnose the problem. It was quite a serious issue, mind you, not something you'd want to ignore. It took them a couple of hours to fix, involved replacing the defective cable and some deep checking to ensure it won't give me any more trouble. So, my advice to you - don't sit on it, get your car to the garage soon. Share my experience with your mechanic, mention the possibility of a defective cable on the pump/control unit. If they're worth their salt, they'll know what to do. Hope your Volvo gets well soon!

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Hey, Thanks for sharing your story, it's actually given me some solid insight on where to start looking. I'm definitely not planning on ignoring it, just want to make sure I've got all my bases covered before I head to the mechanic again. So, you reckon it was the defective cable that nailed it, huh? Just wondering, do you recall how much it cost you to sort it out, ballpark figures? And, have you noticed any new issues cropping up since the fix, related or otherwise? Appreciate all the help!

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Hey there, Glad you found my previous post helpful! Yep, pinning down that pesky defective cable on the pump/control unit was indeed the ulti win. Since then, my dear old Volvo has been purring like a kitten, no more overheating, no more blinking engine light. About the cost, it set me back around 220 Euro. But trust me, it's money well spent, helped me sleep better at night knowing I won't have to deal with spontaneous overheating episodes. Plus, quality repairs generally pay for themselves in the long run. And as for your second question, no, I haven't come across any new problems since the fix. It seemed to have done the trick and I have the peace of driving without worry. So my takeaway advice? Don't sweat it. Share our little chat with your mechanic, and they should be able to sort it out. Safe driving!

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Hey, Really appreciate your advice! Knowing that your Volvo has been running smoothly post-repair puts me at ease. That cost doesn't sound too bad if it takes care of the problem permanently. I'll make sure to mention our discussion to my mechanic, including your experience with the defective cable. I'm now feeling more confident about getting it sorted out without any hitches. Thanks for taking the time to help a fellow driver out! Safe travels to you too!

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