Check engine light (explorer 2008)

[usamahmd]

Check engine light (explorer 2008)

I have done a computer check and found the following issues:
P0135: O2 Sensor Heater Circuit (Bank 1 Sensor 1)
P0141: O2 Sensor Heater Circuit (Bank 1 Sensor 2)
P0155: O2 Sensor Heater Circuit (Bank 2 Sensor 1)
P0161: O2 Sensor Heater Circuit (Bank 2 Sensor 2)
P0403: Exhaust Gas Recirculation Control Circuit
P0443: Evaporative Emission Control System Purge Control Valve Circuit

I am not sure if these are real issues or not..

For the O2 sensors I have made one check and it works fine.. I have pushed some of the carburetor cleaner in the air hose and found that all of the O2 sensors voltage raises till around0.99voltage…
I have done so far all of the following:
- EGR sensor changed
- Spark plugins changed
- Cleaned the throttle
- Tested O2 sensors and find them working fine (they gave oms and their voltage changes if carburetor cleaner spray came in).
- Air valve changed (attached its picture)

I am not sure what else can be changed to solve this, issue..

Please help…


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[Rcflyer330]

if you think there is not a problem reset the codes if they come back then look into it further.

here is a thread on a 2006 explorer v6 with all the same codes it also tells the fix take a look at it

http://www.explorerforum.com/forums/showthread.php?t=382451

 

[usamahmd]

many thanks RCflyer330; actually i have rested the codes either by removing the battery negative terminal for a while. Or using Torque software..

but the check engine light is coming back each time i rested them after couple of runs.

also, i have checked the nominated post but his solution was to replace the PCM; which i am trying to avoid (or at least make it last option)..

please advise...

 

[sgully67]

Check fuse #42 in the underhood fuse box. If that fuse is blown or has no power it will cause all those codes. FYI the O2 sensor codes that are setting refer to the heater built into them to help them reach operating temperature sooner. Voltage readings sent to the PCM will be mostly unaffected.

 

[usamahmd]

Thanks sgully67...

I just checked fuse #42 after starting my engine, and found it working and have power.

It might be good to mention here that; couple of days before the "check engine" light appears; I have noticed that fuse #36 was burn; so I have changed it and plugged new similar one “20” , but the new one is not original which I have purchased it from small shop that has different type of chines made fuses.. can this be part of the problem causes??

 

[mcintoshjr]

O2 check engine

Did you ever get resolution?