CEL and Trac Off Lights

Hey folks,

For the past 3-4 weeks my CEL and Trac lights have been coming on and off. I took it to AutoZone and the code came back as oxygen. I bought a new gas cap from Napa and put it on today but as of now the lights are still on. Could one of you mechanic genius help me out with the next steps? Not sure how serious this is nor how to fix it

 

That word “oxygen” seems pretty vague, did they give you a code number? That could mean oxygen sensor, it could be quite a few things

 

Thanks - heading to AutoZone now I'll report back shortly with more details

 

By the time you make 10 trips to Autozone getting the code read for free, you could spend that $50 gas money on your own code reader. Just a thought.

 

Yes sir - it's oxygen sensor. Im assuming this requires a visit to the mechanic?

 

They are pretty easy to replace. If you can change your own oil, could change out an O2 sensor. Your truck likely has 4 of them. 2 upstream, 2 downstream.

 

Perfect. Thank you I'll dig into this DIY

 

You need the code number to know what your actual problem is, you have 4 oxygen sensors if you have a v6 and 2 if you have a 4cyl.

 

P0174 V6

 

Not saying this is your problem. Just what I found upon a quick search:


Causes
Here are the most common causes of P0171 + P0174. Vacuum leaks (particularly at the intake manifold) and the MAF sensor are the most common culprits.

 

P0174 is a lean code (not enough fuel/too much air) for bank 2 (drivers side) it's likely not an oxygen sensor problem although that is a possibility, if there's no obvious exhaust leaks or leaks in the air intake system you really need a scan tool to monitor fuel trims and oxygen sensor data to diagnose it.

 

Appreciate it man. Will try this first tomorrow then move on to O2 sensor

 

Update - lights were off this morning but I cleaned out MAF and O2 sensors. Also checked all tubes everything looks okay. Will check back in if lights come on again soon and an update from a more intensive inspection/repair