Hi. I've had an engine light on for a while and been procrastinating to fix it since it's my wife's car and I'm a mechanic.
Codes p0447 and p0455
I did the last thing and ordered a new ccv. I installed it. Disconnected the battery. Drive it and the light came back on. So I got under the car and tested the wires. Not sure if I did it right. Tested for voltage at the connector using the two wires with key on. No voltage. So I tested for voltage with my own ground and I got voltage at one wire. Tested the other for ground and I had no ground. I followed the harness the best I could and it went on top of the gas tank and I gave up.
Guess I just wanted to know if anyone has wiring diagrams of the ccv that I could look at to further diagnose this and find out where the ground goes. If the pcm controls the ground or the power. I wanted to just make a new ground but it won't work if the pcm controls it.
Please supply at least model year for your vehicle in your profile or your post, after which, I will supply you with a wiring diagram.
However, what I can tell you is that the CC valve is going to be powered whenever the engine control relay is enabled, and that it's the ground that is being switched by the PCM. So adding your own ground isn't telling you much except to confirm that the +12 wiring is still intact.
That's what you already have, and P0447 situation is causing P0455 code. If valve doesn't work (ala P0447), then result is that leak in system is detected (P0455).
You're right. Sorry haven't looked up the p0447 in a while. Are you a Hyundai tech? Have you seen broken wires for this problem before? Possible corrosion at the pcm connector?
CF211 won't be your problem. You have already identified that you are able to see +12V at the solenoid if you run the other lead to chassis ground, so CF211 is passing the +12 just fine.
Have not previously seen wiring issue 'south' of the valve to control side be an issue, but then again, there's always a first time.
Cf211 has both wires though. Could be possible for one pin to be corrded. I live in Canada so corrosion is a big issue. Also wanted to test the wire from the ccv connector to cf211 if I find the wire is open all the way to the pcm connector.
I have a thread on the one code as I had low voltage to the solenoid. Corroded wire in the harness. Photo was posted for P0455 only
Maybe in the same location of the harness as my 12V lead.
Just saying, just in case we're talking about the same thing. I'd never think to look for it if I was not pointed to the harness and peeled the wrapping off and it was obvious at that point.
thanks. i'll give that a check in a bit when my wife gets home. the connector looks fine just like you said in that thread. really hoping thats my problem as well since its an easy fix.
now i just have to replace the right rear cv shaft ( cracked tone wheel causing abs and traction lights ), right front control arm ( bad ball joint ) and the rear sway bar links and i might not want to trade this thing in anymore. am i the only mechanic that hates fixing his own cars?
I did mine in Dec I believe. Pulling the connector off was the hardest part next to getting the tape to peel back close to the plug. The cold does not help but I carefully slit it with a knife to expose the 2 wires.
Really wish I checked this connector before buying a new valve.
It was repaired at some point before I owned this car. Had a bad solder job. I did a temp fix without solder or heat shrink untill I can bring it to work.
You're right. Ahh a summer job when I also do another oil change. I'll be doing one sometime this week to carry me over tell spring.
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