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Well its a mazda tribute with a 3.0 v6, 20003, yes have

Customer Question
well its a mazda tribute...
well its a mazda tribute with a 3.0 v6
JA: What year is your Tribute?
Customer: 20003
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: yes have changed both o2 sensors and still showing the in the fault codes
JA: Have you located all of the vehicle's oxygen sensors? Are the wires leading to and from each intact and in good shape?
Customer: yes they looked fine it also shows a po443 evap purge control valve circuit
JA: Anything else you think the mechanic should know?
Customer: before the fuel cap light came on but that was a week ago it is now off and does not show as a code
Submitted: 1 year ago.Category: Mercury
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Answered in 1 hour by:
7/26/2016
Mercury Mechanic: Dan, ASE Master Technician replied 1 year ago
Dan
Dan, ASE Master Technician
Category: Mercury
Satisfied Customers: 1,775
Experience: Dealer Auto Technician. ASE Master Certified, 15 years of experience
Verified

Hello,

If your purge valve is stuck open it could be affecting the o2 sensors. It will be a vacuum leak and cause a lean code p0171 and p0171. Do you know which code for the oxygen sensors were there?

A faulty purge valve could cause an evap leak which would set the light for the gas cap as well.

Please reply to this if you need more help and we can continue this conversation. If you are satisfied with my service, please rate at the top of the screen. Rating does not close out your question. Remember, sometimes it is difficult to completely diagnose your vehicle without being there, but I will try to give you the best answer I can. If I am not giving you 5 star service, please let me know what I missed.

Thanks,

Dan

ASE Master Technician

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Customer reply replied 1 year ago
I have a PO 443 code evaporative mission system purge valve circuit . PO 135 o2 sensor heater circuit bank one sensor one code PO 141 o2 sensor heater circuit bank one sensor two code PO 155 o2 sensor heater circuit bank 2sensor 2 heater circuit bank to censor to code P016 I have also changed out both O2 sensors and yet they still show this code I am not showing a lean code just the following po443,po135,po141,po155,po161
Mercury Mechanic: Dan, ASE Master Technician replied 1 year ago

Have you check the wiring closely especially near the exhaust? Sometime wires can get melted from the heat of the exhaust. Look at the engine harness carefully for signs of rodents. Sometimes mice will chew through the harness as well.

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Customer reply replied 1 year ago
Best I could the wiring harness for both o2 sensors was fine. I have looked at the Sylinode that is close to the fuel tank. I checked for continuity . I did get an ohms reading but it was too high to get an actual "tone"from my meter. I did not check for voltage though. Also there is a silanode under the hood I checked that I did get a continuity tome from my meter but did not not get a voltage reading but wasn't sure if your supposed to be getting voltage to that one all the time. If that makes any sense ?
Mercury Mechanic: Dan, ASE Master Technician replied 1 year ago

Clear those codes out, turn the key on without starting. Rescan. Which codes come back?

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Customer reply replied 1 year ago
Cleared out the codes. Cycled the key off waited 3secs then turned key back on Did Not start no codes were found I did have a yellow waning light on scanner I think it that it indicates the emission readiness status/car has to be driven according to the scanner owners manual.
Mercury Mechanic: Dan, ASE Master Technician replied 1 year ago

Start it up and let me know which codes come up.

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Customer reply replied 1 year ago
Ok I actually drove it around the block. The same previous codes came up under pending codes but did not set the engine light on.
Mercury Mechanic: Dan, ASE Master Technician replied 1 year ago

Does it have any running issues?

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Customer reply replied 1 year ago
PO 443,po135,po141,po155,po161
Mercury Mechanic: Dan, ASE Master Technician replied 1 year ago

It may take a few drive cycles to set the light

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Customer reply replied 1 year ago
Runs fine sounds fine has power I don't feel any changes in that regard
Mercury Mechanic: Dan, ASE Master Technician replied 1 year ago

Is your scan tool able to read live data?

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Customer reply replied 1 year ago
It says it can.
Customer reply replied 1 year ago
Ok I finished a live data test
Mercury Mechanic: Dan, ASE Master Technician replied 1 year ago

Live data is not really a test, can you see the heater circuit voltage of the o2 sensors with the scan tool?

Do you have a multi meter? Are you able to do some electrical tests with a wiring diagram?

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Mercury Mechanic: Dan, ASE Master Technician replied 1 year ago

Hello again Dan here,

I am contacting you because the post has not been closed or rated.

This question is coming up on 7 days which means it will close.

You have already paid to get this question answered, but you have not rated.

Let me help some more. Is there anything else I can help you with?

If I did not give you 5 star service, please let me know what I missed.

I do not get compensated for my time and resources unless you rate me.

Thanks

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Dan
Dan
Dan, ASE Master Technician
Category: Mercury
Satisfied Customers: 1,775
1,775 Satisfied Customers
Experience: Dealer Auto Technician. ASE Master Certified, 15 years of experience

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