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1998 Honda Civic Ex Coupe. Does anyone know why my car is running a code P0170 and P0171. We checked for vacuum hoses and were all good. Checked and changed the fuel filter, All header through exhaust gaskets are good, intake is good, all sensors are plugged in correctly, upstream o2 sensor...

So my rear suspension is squeaking. Just replaced the top hats or rear strut mounts and thought that would solve the problem and it sort of did and didn't. The squeaking went away a little and next to change is the rear lower control arms since a bushing is kind of worn out. But I'll let the...

Everything you guys are saying are helping me so I have no problems with the comments. Well they fixed the exhaust leak problem and resetted the CEL code and drove it for about another 50 miles or so to make sure all the monitors were ready to smog. Basically, the check engine light was off for...

Well there is now just the P0133 code instead of the other one's. The Denso's I bought specifically for a 1998 Honda Civic EX was about 4 weeks ago and O2 emissions passed with my smog so maybe it is that or maybe it isn't not sure anymore. @HeX

So only NTK O2 sensors work lol? not sure everybody uses it and no MAF sensor on Honda's except for 8th gens other civics including mine have an IAT sensor. @HeX and would this work? https://www.summitracing.com/parts/ngk-24542/overview/year/1998/make/honda/model/civic

Well I just replaced it a couple weeks ago with the Denso 234-4099 Oxygen Sensor or https://www.amazon.com/gp/product/B000C5WCN6/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1 @HeX

Here's the air filter http://www.procivic.com/pages-product_car_part_info/category-70_85/product-304/index.html and got the codes tested from multiple scanner tools as well as the shop. Well now it's throwing a P0133 lol because I haven't checked it in over a couple of weeks since the other...

So I have a Injen Short Ram Intake that is smog legal for my car only and has a 3" Injen filter. I have recently replaced the top O2 sensor with a Denso 234-4099 Oxygen Sensor or https://www.amazon.com/gp/product/B000C5WCN6/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1 Honda's actually do have a...

What is it then because there are no vacuum leaks, map sensor replaced, all gaskets changed, no exhaust leak pretty much every possible lean code fix has been done.

That's why I'm saying it's a faulty ecu and probably just need to replace it.

The only problem with that is I know what the code is already because my car is an ODB2 not ODB1. The code my car is throwing is a p0170 and 171 but already repaired those issues.

Hey so I have this check engine light that has been on for a while even after car repair shop fixed the exhaust leak and smog. The light came back on and was wondering if it might be an faulty ecu since their is no vacuum leak or exhaust leak and anything indicating that my car is running lean...

Was wondering what parts would be great upgrades to the engine and etc. The engine is a D16Y8.

This is my ride. 98 Civic EX Coupe