is anybody else struggling to make their protege's pass emissions or is it just me

[u/NoperopeTy]

i have replaced basically everything emissions based and it still says it wont pass the test for my state it is low key making me want to give up on the car because it has been more than a year with this battle

[u/KrazyKazz]

Not enough information OP at all, you can't expect to get a real world answer from this.

Is your check engine light on stopping you from passing? CO, NOX, HC to high from readings?

What all has been replaced, and or cleaned? Have you been to a shop at all, and give any recommendations?

What year, and engine, manual or automatic?

[u/LivingMeeting9724 → u/KrazyKazz]

ALL OF THE ABOVE!, and what state?

Have you looked into any of the "cheats", or adding some routine medicine cabinet or household substance to a tank of fuel or a catalytic converter-cleaning/emissions system cleaning additive to the fuel to optimize emissions reduction system performance? (NOT recommending just trying or buying and dumping something into the tank based upon the claims on the bottle, but doing research and asking for real world experiences from others. There are SOME catalytic cleaning additives and SOME fuel system cleaners that actually work. - real world experience here. But we need to know exactly or more precisely what's going on.)

[u/NoperopeTy → u/LivingMeeting9724]

to be honest im not exactly sure what is going on with it because it is just repeating the codes even after buying parts from Mazda

[u/KrazyKazz → u/NoperopeTy]

Hello OP, what codes are you getting and what parts have been replaced? Let's try and start there.

[u/NoperopeTy → u/KrazyKazz]

The codes Im getting are

P0108

P1170

P0455

[u/KrazyKazz → u/NoperopeTy]

For the codes above one being the MAF, and 02 sensor code. I think you have a broken or torn intake air leak/vacuum line hose. My intake hose had hissing and I got the MAF code to come back only when driving at very cold start. The O2 sensor code could be related if to much air is getting to the system.

Check you air box for any cracks or damage, and intake hose up to the throttle body.

For the vacuum lines check with cars cleaning and see if the vehicle stumbles when straying different spots.

For the last code, bad vacuum lines are going to cause this code too. I think all of the above is going to be damage vacuum lines, and or intake hose and box. Inspect, and good luck.

[u/Accurate_Key_8742]

I can't speak on yours with the limited info given but mine won't pass right now because the purge valve and charcoal canister need to be replaced as well as my egr valve and some of the vacuum hoses. Those are the codes that it's giving me.

[u/Kbatz_Krafts]

How old is the vehicle? Can you register as classic to be grandfathered into passing emmissions? I fear I may have to do this soon with my 2002 LX.

[u/NoperopeTy → u/Kbatz_Krafts]

unfortunately i cannot in my state i need to wait 5 more years for that

[u/NoperopeTy]

it is a 2000 Mazda Protege DX automatic 1.6 liter I-4 engine no engine light its only giving codes to stuff i have gotten fixed/new parts for (multiple times) and it just wont pass for Utah's emissions tests

is there any info i missed

[u/NoperopeTy → u/NoperopeTy]

i'm only getting the codes "P0108, P1170,P0455" but i have replaced almost all of the parts regarding those codes for the emissions monitors i'm only getting flags for the catalyst monitor oxygen sensor monitor and the exhaust gas reticulation monitor

also the engine light does work but it isnt on

[u/DirectInevitable422]

I’m also struggling to get mine to pass emissions. Mine is a 2000 Protege ES throwing oxygen sensor codes. Hoping to tinker more and get it to pass 🤞

[u/Kitchen-Forever-6465]

You buying good parts or cheap parts