2000 V70 NA P1672 Topic is solved

[dj_v70]

Hello, I am trying to see if I can get my v70 through inspection. I am stuck with cel P1672. Car drives fine.

I checked the resistance of the CVVT solenoid and it is 6 ohms. Could anyone point me to next troubleshooting step. I thought I read something suggesting this code is electrical fault, not mechanical. As such, I assume there is no reason to replace valve given reasonable resistance. Thoughts?

[dj_v70]

Found an older thread that suggests I need to replace solenoid:
viewtopic.php?t=56791

I’d really like to prove out wiring first though. Any ideas?

[dj_v70]

Another thread suggests:
P1671, Camshaft reset valve, signal too high or low.
P1672, Camshaft reset valve, faulty signal

This seems to conflict with replacing valve.

[scot850]

While not possible to check from this distance, it is likely the solenoid has either got sticky or the resistance in the solenoid has gone out of spec.

The newer versions you can remove the solenoid from the valve portion and clean any hardened oil build up off.

I can't recall the resistance level it should have. Hopefully someone else has one. Be aware, if your car has the older plug style there the plug comes of the back of the solenoid, it is likely a new one will need a different plug and a wiring fix as they are not the same.
I forgot about this thread I did a while back that my help:

viewtopic.php?p=632854&hilit=solenoid#p632854

Neil.

[dj_v70]

Thanks Neil. I did find your thread while first looking for guidance. In that thread, you note 4 ohms while I found 6 on mine. My assumption was that was close enough.

I had a 2003 v70 years ago that would get a p0014 about every 5000 miles. That was my oil change indicator for awhile as that made the solenoid fault go away. Ultimately, I found that pcv was faulty which was likely a contributing factor.

But this fault ‘signal faulty’ makes me think electrical vs mechanical. However, just in case, I used an engine cleaner and then changed the oil. I also cleaned the electrical contacts for the solenoid and connector. The light has been taking a few days to detect fault, so, I am waiting, crossing my fingers and hoping this resolves my issue.

[scot850]

Hopefully so, but we wait with bated breath!

Neil.

[dj_v70]

It has been 2 months since I posted on this, I think that I might finally have it resolved.

Eventually, the Cel started coming on immediately after I cleared it. I read on another forum that this code is misleading suggesting an electrical fault when the computer is faulting based on timing.

I took the solenoid off and cleaned it with carb cleaner and verified that it actuated with 12v. I noted that the gasket filter looked clogged, so I liberally sprayed that also. I put it back on and cel immediately came on again.

So, I order a new gasket with integral filter from fcpeuro and put it in this morning. The cel went off immediately upon starting the car for the first time in months.

Hopefully, I got it this time. If not, I’ll report back again.

[scot850]

I will follow this with interest as I am about to tackle a similar problem on an 02 XC70 with an exhaust CVVT solenoid error. It has the newer style solenoid (now what you get if you need one from Volvo) that you can separate the solenoid from the valve for better cleaning.

I am planning to replace the gasket regardless. I hope that an an oil/filter change may resolve the issue.

Neil.

[dj_v70]

My car hasn't been inspected in over a year due to this fault and now my registration can't be renewed because my car hasn't been inspected.

I finally bought a new solenoid, disconnected the plug from the old one (but didn't unbolt it from engine) and jumpered to new solenoid. The new solenoid is connected electrically but not mechanically to the car. I started the car expecting the new solenoid to buzz and to see the piston moving back and forth. Nothing:(

Does anyone know if this is normal? Is solenoid supposed to be activated at idle? Not sure whether to put the new solenoid in the car or not now. I have Vida/dice but haven't used it in years and my virtualbox drive installation got corrupted. I recall it was quite a bit of work to get Vida installed/working the first time.

[dj_v70]

I tried looking for voltage on solenoid connector.
0V with ignition on and not running.
Tried measuring between each pin and ground, still 0V.

I read on different forum that duty cycle should be 50% at idle.
Connected voltmeter to connector at idle, nothing.

Need a schematic to go any further. And, as I stated earlier, my version of Vida is dead:(

Any ideas for shortcut would be greatly appreciated.