Ran rear dash cam and now have intermittent TPMS "Tire Pressure Sensor Fault" issue with both back tires

[TannerVoss1231]

Ran a rear dash cam wire below the body of the bed then up through the floor under the rear seat. I threw a string with a weight on it over the rear passenger wheel well liner and fished the camera line up and over. Wondering if it is causing interference with either the sensors or the antennas that pick up the signals.
It primarily happens to the passenger side rear but sometimes happens to drivers side rear.

Should I slip a shielded wire loom over the wire where it is near the wheels?

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[Msfitoy]

I've had similar issues with right rear tire even before installing Wolfbox DC...it's rare enough that I'm just too lazy to find a fix...it could be due to my fat tires, one or two too many lights, camera, etc ...or it could be just one bad TPMS sensor...

 

[Colo_Ranger]

Ran a rear dash cam wire below the body of the bed then up through the floor under the rear seat. I threw a string with a weight on it over the rear passenger wheel well liner and fished the camera line up and over. Wondering if it is causing interference with either the sensors or the antennas that pick up the signals.
It primarily happens to the passenger side rear but sometimes happens to drivers side rear.

Should I slip a shielded wire loom over the wire where it is near the wheels?

If you disconnect the camera from power, do you still have issues? Maybe try unplugging the whole dash cam setup. If the problem persists, it was coincidental. If the issue stops, you have interference somewhere.

I have tons of lights, lots of electrical work added to the truck, and a dash cam with the cam wired through the fender and have zero issues with my TPMS sensors.

 

[1pt21gw]

I ran two cameras to the back, one up to and on my bed rack, the other to below the bumper to watch the hitch. The one to the bumper follows the loom that goes along / above the fuel tank on the left side frame rail. No faults here.

 

[airline tech]

I would try the Shielded Loom or reroute if possible, it appears its picking up (RFI) Radio Frequency Interference.

 

[Grandaccess]

I have not installed or changed anything but for two weeks now I get an intermittent TPM fault also, it goes off in a few hours and good for a few days then it almost seem like the same spot on the interstate at the state line, I had figured it might be some RF Interference from some interstate monitor or road sign, I am a ham and sometimes get Interference around the same spots on 146.52 Mhz I think the TPM are on 433 Mhz?
since I know my tires are not low or flat I just put up with it

 

[TannerVoss1231]

If you disconnect the camera from power, do you still have issues? Maybe try unplugging the whole dash cam setup. If the problem persists, it was coincidental. If the issue stops, you have interference somewhere.

I have tons of lights, lots of electrical work added to the truck, and a dash cam with the cam wired through the fender and have zero issues with my TPMS sensors.

I did try this but it didn't immediately fix the issue. We were on a 5 hour drive and after the issue happened for the 3rd time I unplugged the cable for the rear camera from the front camera and left it for about 20 minutes which did not make any difference for the TPMS error

 

[Grandaccess]

I ran two cameras to the back, one up to and on my bed rack, the other to below the bumper to watch the hitch. The one to the bumper follows the loom that goes along / above the fuel tank on the left side frame rail. No faults here.

it shouldnt be a wiring problem because the TPMs are on Freq. 433 Mhz and unless some oddball wire is cut to a harmonic length there shouldnt be any Interference, and I havent changed anything and have been getting TPM fault for a few weeks now
Sun Spots?
Interference from remote controlled road signs, they might be in the same band as 433 Mhz its kind of a free for all there

 

[DukeCanBuildit]

I did try this but it didn't immediately fix the issue. We were on a 5 hour drive and after the issue happened for the 3rd time I unplugged the cable for the rear camera from the front camera and left it for about 20 minutes which did not make any difference for the TPMS error

Just in case….

 

[airline tech]

I did try this but it didn't immediately fix the issue. We were on a 5 hour drive and after the issue happened for the 3rd time I unplugged the cable for the rear camera from the front camera and left it for about 20 minutes which did not make any difference for the TPMS error

To confirm it’s the Camera, completely disable the camera, Power Feed.
You have eliminated the rear feed (signal)
So it’s either the quality of the cam system or routing of the front cam and or power and ground to it.
Possibly not a (RF) issue but a Can Bus interruption of the signal, wiring near the twisted pair of wires for the Can Bus.
Post how you are wired and routed and brand of camera system.

 

[airline tech]

One other note - was anything else changed in the truck - such as phone charger or cords?

 

[Big Blue]

I did try this but it didn't immediately fix the issue. We were on a 5 hour drive and after the issue happened for the 3rd time I unplugged the cable for the rear camera from the front camera and left it for about 20 minutes which did not make any difference for the TPMS error

Has anyone thought been made that maybe the battery in the the TPMS sensor is going bad? The TPMS sensors are battery powered and don't last for ever. I have heard of people buying sensors cheap online and getting sensors that have sat on someones shelf and not lasting. The sensors will have a build date in their label so you can see how old they are.

 

[TannerVoss1231]

Has anyone thought been made that maybe the battery in the the TPMS sensor is going bad? The TPMS sensors are battery powered and don't last for ever. I have heard of people buying sensors cheap online and getting sensors that have sat on someones shelf and not lasting. The sensors will have a build date in their label so you can see how old they are.

Those batteries supposedly last 10 years and once they die they are dead and shouldn't be causing intermittent issues. Plus both rear tires take turns having an issue

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