p0172 p0175

*FIXED* - Previous owner put ebay injectors. Got some from motorwest and it runs so much better! No codes since.

I need help diagnosing my tacoma (2006 v6 double cab) Recently purchased this truck from a family friend. Had 3 codes when I bought it - p0172, p0175, p0606. Did some research on the p0606 code (ecm) and found on the forums that the o2 sensor might be faulty and cause the ecm code to be thrown. I bought 2 new Denso o2 sensors, cleared the codes, and it hasnt come back (have driven about 100 miles at least since replaced) so I think that code is resolved. But I am stuck on the p0172 and p0175 codes (system too rich bank 1 and 2). I cleaned the MAF sensor, CEL still came on. I ordered a cheap one from Amazon and switched it out just to rule out it was the MAF itself but still CEL comes on. Cleaned the throttle body, still comes on. I was told new fuel injectors, spark plugs, fuel pump system were installed before purchased. Truck has almost 270k miles.

I took screenshots of the freeze frame data but I dont know what to look for. Any help would be appreciated! I want this truck to last another 300k

 

First off don't buy cheap parts off Amazon/ebay, most of it is junk/counterfeit stuff that doesn't work at all, doesn't work properly, and/or doesn't work long.

There's not many things that can cause a rich condition.

My first two questions would be:

Is the intake system stock?

Did someone put some cheap/shit injectors in it?

 

Intake is stock. Pulled out the filter and it looked fine. Not really dirty, seemed recently replaced. Im not sure on the quality of the plugs. I was told the injectors were denso, i dont know if they bought it off Amazon/ebay. What is a good site/place to go for genuine parts?

 

If they bought a whole set for what one or two actual genuine ones cost you may as well toss them straight in the garbage.

Dealer, parts store, or rock auto only for parts.

Stock injectors and coils hardly ever fail in these but it always amazes me how many people replace them as "maintenance" or trying to fix something then they use the cheapest ones they can find and wonder why they have issues after.

 

I guess Ill ask or try to see if where they got it/if its a good quality one. If I bought them at a parts store does the brand matter or are they all decent and better than Amazon/ebay. I know autozone can carry injectors that are compatible but there are different brands and prices. Of course I want Denso but I have to budget in some places

 

I mean almost anything is better than the cheapo ones you find all over Amazon/ebay.

Standard Motor Products ones are usually good but sometimes they are close to OEM in price.

I'd be curious what they were chasing when they put injectors in it.