It started with one code now many?
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Driver School Candidate
Joined: Dec 2009
Posts: 20
Likes: 1
From: wi
It started with one code now many?
HI everyone, started with cel and po303 cylinder 3 misfire, I replaced all plugs and cylinder 3 coil, and replaced fuel filter. Drove after and now i have po300 random midfire,302,303,304 cylinder misfires along with po171 system to lean bank one and finally po1153 a f sensor circuit response malfunction. car runs rough and cel light flashes then goes solid ? Did I hook up something wrong?
Lexus Fanatic
Joined: Sep 2010
Posts: 25,915
Likes: 4,274
From: Alberta
How many miles? This is a classic sign of bad VVTi solenoids also known as oil control valves. Your only option is OEM not aftermarket. Never buy OEM on Ebay or Amazon you'll likely get fakes. Do you still have the original coils? Good chance they are still good.
Lead Lap
Joined: Nov 2019
Posts: 3,689
Likes: 1,101
From: Michigan
Hello,
What plugs specifically did you use, where did you purchase them?
It doesn't seem like the issue is in the Oil Control Valves, as the cylinders in Both banks are misfiring, unless both of them died at the same time, which is extremely rare. Codes seem quite random and all over the place, since the issue appeared right after you replaced all the Plugs, it could be part of the culprit. There are a lot of counterfeit items, especially around eBay and Amazon, and a lot of plugs to choose from, you will have to specify the exact model you got and where you got them.
Other thing you can do if you have a scan tool is check Engine Live Data, look through Short Term Fuel Trims, Misfire Load, A/F sensor Readouts. If the readouts are all over the place, it could mean that the fuel is not burning properly for one reason or another.
Hope this helps and best of luck!
What plugs specifically did you use, where did you purchase them?
It doesn't seem like the issue is in the Oil Control Valves, as the cylinders in Both banks are misfiring, unless both of them died at the same time, which is extremely rare. Codes seem quite random and all over the place, since the issue appeared right after you replaced all the Plugs, it could be part of the culprit. There are a lot of counterfeit items, especially around eBay and Amazon, and a lot of plugs to choose from, you will have to specify the exact model you got and where you got them.
Other thing you can do if you have a scan tool is check Engine Live Data, look through Short Term Fuel Trims, Misfire Load, A/F sensor Readouts. If the readouts are all over the place, it could mean that the fuel is not burning properly for one reason or another.
Hope this helps and best of luck!
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