P1800 - VIAS Control Solenoid Valve Circuit Open
#1
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P1800 - VIAS Control Solenoid Valve Circuit Open
Ok, so I removed the VIAS unit a couple weeks ago and used a DIY block-off plate to see if the mod the Altima guys had been doing is worth trying. Well I did not like the loss of low-end when driving around town and did not really notice any high end improvement, so I put the VIAS unit back in later that day.
Ever since then I have been getting the following code...
P1800 - VIAS Control Solenoid Valve Circuit Open
It does not set off the CEL, but the code is in memory. I've erased the code with my scanner on multiple occasions, but the code keeps returning. I have also noticed that my car appears to be sluggish now. WOT seems to take forever to get in the upper RPM range now.
Anyone have any more details to what this means or what steps I can take to see what is causing this to occur.
Ever since then I have been getting the following code...
P1800 - VIAS Control Solenoid Valve Circuit Open
It does not set off the CEL, but the code is in memory. I've erased the code with my scanner on multiple occasions, but the code keeps returning. I have also noticed that my car appears to be sluggish now. WOT seems to take forever to get in the upper RPM range now.
Anyone have any more details to what this means or what steps I can take to see what is causing this to occur.
#3
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Originally Posted by NmexMAX
Check the harness and verify it is plugged in and still functioning. Also, try checking your vac tubes to verify that they are not reversed.
When I swapped the unit back in, I removed the screw used to plug the line and put the line back on the unit.
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Update: I read over the FSM for testing procedures. Checked the connector and it was fine, then pulled the fuse that according to FSM supposedly controls the solenoid to see if blown. It was not, so I put it back in.
Went inside and went to bed.
Woke up this morning, checked codes on my scanner and P1800 code was gone. I drove 60 miles to work, then at lunchtime, drove around and checked codes again. P1800 showed up in PENDING DTC's, BUT driveability issues are gone????
Went inside and went to bed.
Woke up this morning, checked codes on my scanner and P1800 code was gone. I drove 60 miles to work, then at lunchtime, drove around and checked codes again. P1800 showed up in PENDING DTC's, BUT driveability issues are gone????
#6
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Originally Posted by Puppetmaster
Any updates? Sounds like you may have fixed the open circuit, since the VIAS is working again (based on your driveability comment).
I am wondering if the solenoid and/or valve is not working properly causing the random code and since it is a pending code, it has to occur so many times before it is considered by the ECU as a saved code (issue).
#11
I borrowed this shot from another thread on the block off plate/VIAS delete.
here's the link, some good info throughout the thread
http://forums.maxima.org/5th-generat...r-5-5-gen.html
here's the link, some good info throughout the thread
http://forums.maxima.org/5th-generat...r-5-5-gen.html
#16
Change the cam sensor ASAP
It's fairly cheap to replace as far as parts go, and is also fairly easy to replace other than being difficult to reach if it is position 2. This is a recalled part, so it may be covered by warranty.
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