reinhard_johnson1
Avensis Diesel Reduced Engine Power
Summary of the thread
A 2018 Toyota Avensis diesel is experiencing reduced engine power, a check engine light, and rough engine performance, particularly with jerking during acceleration. The initial suspicion was a lean running issue, possibly due to a defective injection valve. Suggestions included checking the mass air flow (MAF) sensor, throttle body, and EGR valve for potential causes. Ultimately, the problem was diagnosed as a defective injector, which was repaired at a cost of 515€.
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4 comment(s)
reinhard_johnson1 (community.author)
I haven't checked the MAF or EGR valve specifically. Where are they located on this engine? I am not sure, no.
kevinfrost16
Okay, so you're not sure about the injectors and haven't checked the MAF or EGR. Alrighty then! Seriously though, without proper diagnostics, we're just guessing here. While a dirty MAF or EGR could contribute, your symptoms do point towards a potential fuel delivery issue. I really think you should have it checked out by a mechanic, or someone that can run proper diagnostic procedures before something gets damaged. It's a pain, I know, but better safe than sorry!
reinhard_johnson1 (community.author)
Thanks for the advice. Took it to the shop, and it was indeed a defective injector. Repair cost 515€
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TOYOTA
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AVENSIS
kevinfrost16
Whoa, that sounds rough! A lean condition could definitely cause those symptoms. Have you checked the basics like the mass air flow (MAF) sensor or maybe even the throttle body? A dirty MAF can mess with the air/fuel mixture, and a sticky throttle body can cause some weirdness too. Though, I'd expect to see issues at idle if the throttle body was the culprit. Could even be the EGR valve sticking open. When was the last time you had a good look at the air filter? It's probably injectors though, just thinking out loud. But you are not actually sure about the injectors right?