Rough Idle and codes?
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63
Rough Idle and codes?
Hi, I bought a 2017 C63 a few month ago and It's been running great until today. Suddenly at the stop light it started to idle really rough and check engine light came on. I had a friend with a generic scanner plug it in and a bunch of codes appeared. P2A0B, P2279, P152C, P2180, P0300, P0308, P0305, P0306. We cleared the codes and they came back again after 30 minutes drive. The car is stock and out of warranty, I'm just wondering if anyone had similar experience and what might be causing it.
Thanks
Thanks
Thread Starter
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63
Super Member
Joined: Dec 2019
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From: Miami, Florida
W205 C63 AMG Coupe
It could be bad gas. Since that's easiest to rule out, fill up at a different station when you need gas again and see if the problem persists.
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Joined: Aug 2019
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From: Dallas, TX
2020 Range Rover Sport P525 Dynamic
Had this happen to me when I had my Audi. Took it to dealership and they tested the fueled. Told me the gas in the tank was less than 87 octane even tho I had filled up with 93. I figured there was prob some sort of contamination in the fuel at the gas station. However, I typically fill up at Exxon, Shell, BP or Marathon. Havent had any issues so far on the Merc.
Thread Starter
Newbie
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63
Had this happen to me when I had my Audi. Took it to dealership and they tested the fueled. Told me the gas in the tank was less than 87 octane even tho I had filled up with 93. I figured there was prob some sort of contamination in the fuel at the gas station. However, I typically fill up at Exxon, Shell, BP or Marathon. Havent had any issues so far on the Merc.
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⏱️ 700HP Facelift converted C63 S Coupe with Drexler 3.06 plated LSD
Bad gas from the sounds of it. Have you cleared the codes yet? Did they come back at all?
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Senior Member
Joined: Jun 2019
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From: DFW, Texas
2017 AMG C63
I also have a 2017 and had the same problem, looks like most of the same error codes. I trouble shot and took it to an independent sop With no luck, ended up taking 2 dealer and they fixed it with an updated Flash. The service advisor said that this happened frequently due to cars needing the software update.
You can search my old posts on this forum for more info.
You can search my old posts on this forum for more info.
Thread Starter
Newbie
Joined: Sep 2020
Posts: 13
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63
I also have a 2017 and had the same problem, looks like most of the same error codes. I trouble shot and took it to an independent sop With no luck, ended up taking 2 dealer and they fixed it with an updated Flash. The service advisor said that this happened frequently due to cars needing the software update.
You can search my old posts on this forum for more info.
You can search my old posts on this forum for more info.
So I had about 1/2 tank left and filled with 93, added a full bottle of octane booster and drove a about 15 miles to run through any "bad gas" in the line. The car drives normal on the highway, but it's still a little rough at idle. If I keep it in sport+ which keeps rpm higher, It idles normal and I don't get any codes. If I switch to comfort, it idles a little rough and I get some codes. I got P2279 and P152C after driving in comfort for a few miles, including a few stop lights idling. I'm starting to think it might be vacuum leak somewhere. I will see if I can find anything, otherwise I will take it to the dealer.
Last edited by .63AMG; Sep 18, 2020 at 07:09 PM.
Member
Joined: Jan 2022
Posts: 159
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From: San Diego,CA
2021 AMG C63S, 2008 C300
Hi, I bought a 2017 C63 a few month ago and It's been running great until today. Suddenly at the stop light it started to idle really rough and check engine light came on. I had a friend with a generic scanner plug it in and a bunch of codes appeared. P2A0B, P2279, P152C, P2180, P0300, P0308, P0305, P0306. We cleared the codes and they came back again after 30 minutes drive. The car is stock and out of warranty, I'm just wondering if anyone had similar experience and what might be causing it.
Thanks
Thanks
Newbie
Joined: Nov 2023
Posts: 2
Likes: 0
2018 Mercedes C63s AMG
Thanks, I found your thread.
So I had about 1/2 tank left and filled with 93, added a full bottle of octane booster and drove a about 15 miles to run through any "bad gas" in the line. The car drives normal on the highway, but it's still a little rough at idle. If I keep it in sport+ which keeps rpm higher, It idles normal and I don't get any codes. If I switch to comfort, it idles a little rough and I get some codes. I got P2279 and P152C after driving in comfort for a few miles, including a few stop lights idling. I'm starting to think it might be vacuum leak somewhere. I will see if I can find anything, otherwise I will take it to the dealer.
So I had about 1/2 tank left and filled with 93, added a full bottle of octane booster and drove a about 15 miles to run through any "bad gas" in the line. The car drives normal on the highway, but it's still a little rough at idle. If I keep it in sport+ which keeps rpm higher, It idles normal and I don't get any codes. If I switch to comfort, it idles a little rough and I get some codes. I got P2279 and P152C after driving in comfort for a few miles, including a few stop lights idling. I'm starting to think it might be vacuum leak somewhere. I will see if I can find anything, otherwise I will take it to the dealer.
