Rough idle and power loss - what could be causing this?

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Rough idle and power loss - what could be causing this?

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  • Последнее сообщение 2 дней назад
goraw66832 разместил это 3 недель назад

I’ve been noticing a few issues with my car lately. It sometimes idles rough when stopped, and acceleration feels a bit sluggish — like the engine’s not responding as quickly as it should. It’s not completely losing power, but it definitely doesn’t feel normal.
Also, the Check Engine Light comes on randomly, then disappears on its own. No clear pattern, and interestingly, there’s no major power loss when it happens — the car still drives, just not very smoothly.
Any thoughts on what could be going on? Maybe something with the turbo or EGR system? I haven’t run a full diagnostic yet, just wondering if anyone’s had similar symptoms.

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vifar78282 разместил это 3 недель назад

I had similar symptoms on my 2014 Passat. Random check engine light, rough idle, and sluggish response — turned out to be two codes: P1497 - EGR valve sensor issue and P2562 - turbo boost control position sensor. I used InCarDoc with a Bluetooth OBD2 adapter, and both codes popped up right away. Cleaning the EGR valve helped temporarily, but I eventually had to replace it. The boost sensor was just dirty. I’d start with a scan - it’ll save you a ton of guesswork.

fehego8962 разместил это 3 недель назад

P1497 usually points to a faulty EGR valve or its position sensor, and P2562 is a classic turbo actuator or boost sensor issue. When both show up, it explains the rough idle and delayed throttle response. I’d recommend grabbing an OBD2 scanner and checking with InCarDoc — even pending codes can give you clues, especially if the CEL isn’t on all the time. Might be something simple like a connector or carbon buildup.

bomagah593 разместил это 3 недель назад

I had the same thing on my A3 - the Check Engine light came on and went off, but the car felt rough at idle and didn't accelerate smoothly. I just used InCarDoc on my phone and it immediately found these two codes - P1497 and P2562. I ended up cleaning the EGR and replacing the boost sensor. The car runs much smoother now. It's worth scanning before going to the shop.

koyale6605 разместил это 2 дней назад

Sounds familiar - I had almost the exact same symptoms on my Skoda Octavia 1.4 TSI. Turned out to be a combo of a failing EGR valve and a dirty MAP sensor. Rough idle + inconsistent acceleration + random CEL that clears itself - all classic signs.
Before replacing anything, I used InCarDoc to scan for stored codes (even if the CEL isn’t on, the codes might still be there). It showed intermittent faults in the EGR flow and boost pressure readings.
I’d definitely start with a scan - it might point you to something small like a dirty sensor or sticking valve before it becomes a bigger issue. Also, keep an eye on fuel trims and throttle response data if you can - InCarDoc logs that too.

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