manfred_mueller4
Peugeot 2008 ECU Main Relay Issue
Summary of the thread
A 2015 Peugeot 2008 with a gasoline engine and nearly 250,000 km is experiencing reduced engine power and numerous error codes, suspected to be caused by a defective main relay affecting the ECU. The issue persisted despite a basic system reset and checking ECU connections. The problem was confirmed by a workshop to be the main relay, which was replaced, resolving the issue.
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6 comment(s)
manfred_mueller4 (community.author)
Yeah, I've tried a basic system reset – disconnected the battery for a bit, but no dice. The connections to the ECU look okay, but I haven't gone over them with a fine-tooth comb. When you say similar issue, was it exactly the same symptoms? Did you have any stored error codes, and if so, what were they?
gerhardschmidt48
So the reset didn't help. Sounds like you need to check the error codes. I did have error codes and the symptoms were like yours, but I'm no mechanic. If the reset didn't work, I'd get it to a workshop.
manfred_mueller4 (community.author)
Appreciate the input. Turns out you were spot on about getting it to a workshop. Took it in, and they confirmed it was indeed the main relay causing the ECU to act up. 120€ later, and she's purring like a kitten again. Thanks for the advice!
dyver
I have the same problem on a 2008 from 2016; Can you tell me where the main relay is located? Thanks in advance
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CarlyMechanic
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I have the same problem on a 2008 from 2016; Can you tell me where the main relay is located? Thanks in advance
The main relay in a 2016 Peugeot 2008 is typically located in the engine bay, within the fuse box. It's often labeled on the fuse box cover or in the owner's manual. Make sure to disconnect the battery before inspecting or replacing the relay to avoid any electrical issues. Let me know how it goes or if you have any other questions!
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2008
gerhardschmidt48
I had a similar power loss issue with my 2008. Noticed it especially when trying to accelerate quickly. Have you tried any system resets or checked the basic connections to the ECU? Could be something simple before you start tearing into the electronics.