P0357 code at 46k miles
05-23-2024, 05:27 PM
#1
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Join Date: Aug 2022
Location: San Fransico, CA
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‘15 CLS63 AMG S
P0357 code at 46k miles
Hey guys,
I have a 2015 cls63, sits at 46k miles right now. I had a ecc slav stage 1 ecu/tcu tune (tuned it at 42,100 miles) and the tune ran beautifully, no issues, no codes, etc. I tuned back to stock a week ago to pass smog since I live in CA, and the car began misifiring a few days later at low rpms. I was in 5th gear going around 60 mph, not much load on the engine at all and the CEL came on, started flashing at me. Pulled over, turned engine on, off, waited a minute, turned it on and plugged in my scanner and it says p0357, p0300, p13c5 (misfire, low voltage coil codes).
I did spark plugs around 38k miles so I doubt it is those, injectors seem fine too since it's not running rich either. I'm replacing all ignition coil packs this weekend, any thoughts on what this may be? The car WAS tuned for 4k> miles, currently it is running stock tune.
I have a 2015 cls63, sits at 46k miles right now. I had a ecc slav stage 1 ecu/tcu tune (tuned it at 42,100 miles) and the tune ran beautifully, no issues, no codes, etc. I tuned back to stock a week ago to pass smog since I live in CA, and the car began misifiring a few days later at low rpms. I was in 5th gear going around 60 mph, not much load on the engine at all and the CEL came on, started flashing at me. Pulled over, turned engine on, off, waited a minute, turned it on and plugged in my scanner and it says p0357, p0300, p13c5 (misfire, low voltage coil codes).
I did spark plugs around 38k miles so I doubt it is those, injectors seem fine too since it's not running rich either. I'm replacing all ignition coil packs this weekend, any thoughts on what this may be? The car WAS tuned for 4k> miles, currently it is running stock tune.
05-29-2024, 07:01 PM
#2
Junior Member
I had this same code pop up in mine and my #5 coil was the culprit. Running like a champ again since I replaced it. I replaced my plugs 1500 miles ago and thought about replacing my coils but I didn't, this helped with my troubleshooting. I'll eventually replace all coils....
