Lots of Codes!
Thread Starter
Junior Member
Joined: Feb 2020
Posts: 20
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2010 E350
Lots of Codes!
I have had a misfire code on cylinder 5 (P0305) for the last month or two. I changed all the spark plugs, replaced the coil on cylinder 5 and the code still came back. So I switched around the coils and spark plugs to make sure I didn't receive a bad one and still received the same code. So with some research on help on here, I believe the fuel injector needs to be replaced on cylinder 5. I ordered one and it just came in yesterday (still haven't replaced). I was driving the car today and the check engine light was blinking today when I started the car and could tell it had a bad misfire and was very sluggish. I scanned it for codes and received (P300 misfire, P0301 cylinder 1 misfire, P0305 CYLINDER 5 misfire, and P0410 secondary air injection pump). When I got home, I popped the hood to look at the secondary air pump hose to make sure if was fully connected and it was. I switched cylinder 1 and 2 coil and spark plugs and it still has a bad misfire. What is going on?
MBWorld Fanatic!
Joined: Oct 2010
Posts: 5,142
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From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
I have had a misfire code on cylinder 5 (P0305) for the last month or two. I changed all the spark plugs, replaced the coil on cylinder 5 and the code still came back. So I switched around the coils and spark plugs to make sure I didn't receive a bad one and still received the same code. So with some research on help on here, I believe the fuel injector needs to be replaced on cylinder 5. I ordered one and it just came in yesterday (still haven't replaced). I was driving the car today and the check engine light was blinking today when I started the car and could tell it had a bad misfire and was very sluggish. I scanned it for codes and received (P300 misfire, P0301 cylinder 1 misfire, P0305 CYLINDER 5 misfire, and P0410 secondary air injection pump). When I got home, I popped the hood to look at the secondary air pump hose to make sure if was fully connected and it was. I switched cylinder 1 and 2 coil and spark plugs and it still has a bad misfire. What is going on?
