generic vvt solenoid dorman problem

beaven69

New member
Change sensors vvt solenoids one month ago
The car runs very well but to a mark the codes
P0020, p0010 would have been the mark of the selenoid? Since I bought dorman
Casually I started to give less miles or gallon about 7.6
And throw oxygen sensor codes bank 1 sensor 1 and bank 2 sensor 1

The question is the vvt solenoids affect the sensors oxygen?
Or do I actually have to change o2 sensors and solenoids for an original ford?

2010 ford taurus sho non- tune
 
Typically anything that is done based on a voltage or current signal, can cause issues if the signal is not the same as OEM.

I am not sure if the VVT solenoid is linked to the O2 sensors, but I would try using an OEM Motorcraft solenoid and seeing if the issue is fixed.

The mileage/gallon issue is likely due to the O2 sensor fault which could be causing the car to run richer in order to compensate/protect from failure.
 
You are referring to the VCT solenoids?  It is unknown if not using OEM would cause codes to pop up, because people have only used OEM parts for that so far.  Are you still getting the P0010/20 codes?

The O2 codes could be due to an EVAP issue if you have not messed with the downpipes.  Either the purge control valve (in the intake manifold valley) or the canister vent solenoid (underneath the car) could be at fault.  Specifically what codes for the O2 sensors are you getting?
 
thanks for answering

Codes are p0443,p0010,p0020,p0457,p0135,p0155,

The car always ran very well , even with mil light on, 

When I scan the car it throws me all these codes



 
beaven69 said:
thanks for answering

Codes are p0443,p0010,p0020,p0457,p0135,p0155,

The car always ran very well , even with mil light on, 

When I scan the car it throws me all these codes

P0443 indicates an evap circuit fault (https://www.obd-codes.com/p0443)

P0010 indicates cam position sensor fault (https://www.obd-codes.com/p0010) - if you have a tuner you can try and do a cam-relearn through the SCT as well as a KAM (Keep-alive-memory) reset, may help with this, or you may need to replace the sensor (could also be due to the VVT actuator you replaced - was a camshaft relearn procedure performed?)

P0020 indicates cam position sensor fault (https://www.obd-codes.com/p0020); Refer to above, this is the other bank, essentally you are setting a fault for both cams (since we have  DOHC with two camshafts)

P0457 indicates you have an actual EVAP leak (https://www.obd-codes.com/p0457). This is most likely related to P0443, and fixing this may correct both or vice versa

P0135 indicates an oxygen sensor HEATER malfunction  on bank one sensor one (bank one wideband)(https://www.obd-codes.com/p0135). This could be an issue with the sensor itself, an issue with the wiring, or it could simply be unplugged. Further more (not sure how the FORD logic is) it could be due to one of the other faults causing open loop vs. closed loop for emissions controls. Start by checking that the sensor is plugged in and there are no issues visible in the wiring.

P0155 indicates a HEATER malfunction  on bank 2 sensor 1 (bank 2 wideband) (https://www.obd-codes.com/p0155). Check the same things as above. If you have an extra wideband sensor, or feel the urge to spend some money to test something, you can buy a single good wideband, and test it in both bank positions, in fact, you could plug it in and leave it out of the exhaust itself, just plugged in on the ground (you would set other fault codes - such as a stuck lean error) but could see if the heater circuit is not functioning due to another fault.

Because both P0135 and P0155 are heater faults, I suspect they may be due to another fault (causing open loop to stay active rather than closed loop) as the heater status needs to be ON for closed loop operation.

If the car is staying in open loop, your MPG issue would also be a result to be expected, which further makes me believe that is the case.

Since you said you used an aftermarket, dorman sensor, for the VVT solenoid, I would start by replacing that with a motorcraft part. Clearing all codes and seeing what happens. If the VVT solenoid has a leak/was installed improperly that could also possibly be causing some of the issue, such as the EVAP codes.

Did you change oxygen sensor as well previously? If so, make sure you used to correct sensors. If you did use aftermarket O2 sensors previously, then I would change O2 sensors to motorcraft correct wideband sensors first, then asses the VVT solenoids accuracy.

Finally, were there any codes set before swapping the actuator? If so, were they cleared? If you clear these codes do they re-appear?
 
Sounds like you may have wiring issues.  You took off the valve covers to install the solenoids, correct?  Go through the harnesses overlaying the area of the valve covers/intake manifold to see if there is something pinched, or a tube loose/disconnected.  Very easy to do something during a repair, with the sheer amount of gadgetry involved.

Much easier to replace the cam position sensors, but again, it looks like a wiring issue to me.  Have been hearing about rodent infestations lately.
 
Yes, check the wiring first.  Then, if it is OK, it is POSSIBLE that the Dorman VCT solenoids need to be replaced with Motorcraft units.  You can input the VIN at http://www.fordparts.com to find parts specifically for your SHO.

Here is what the site says for a 2010 Taurus SHO
7T4Z-6M280-C
 
beaven69 said:
thank you very much

rock auto dont sale motocraft vvt
this time will go to dealer or ebay

Like SHOdded said, start by checking the wiring, as an issue there could cause all of the codes you are seeing. If there is still an issue and the wiring is O.K then look into changing the VVT solenoid.
 
beaven69 said:
solved .... all code gone

The torture, a simple fuse caused all those code

Sometimes I hate being an electrical engineer, its always the dumb little things like a fuse that screw you. Glad you got it all sorted out!
 
Thanks for circling back.  I see #46 does relate to the O2s and VVTs.  #47 relates to the PCM.


 
Have seen that happen with the Maxi Fuse type units a lot.  Not so easy to tell they are going out either.
 
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