3 ms·

One of the tire pressure sensors in my car tires had a bit flip a couple years ago and I had to reprogram it's ID. Luckily it was a subaru, so only a light came

One of the tire pressure sensors in my car tires had a bit flip a couple years ago and I had to reprogram it's ID. Luckily it was a subaru, so only a light came on in the dash. My old Honda crv however would turn traction control on if your pressure was low - which worked by applying brakes to wheels that were slipping. If you were going up a slippery hill you would soon have no power, sliding backwards nearly off the road in nowhere West Virginia on the way to a ski resort.

amluto 6y ago
Hah. My oven’s bottom unit stopped working. I strongly suspect a bit flip.
jjeaff 6y ago
How in the world would you ever know that problem was caused by a bit flip and not just one of the countless other reasons that a sensor could fail?
- jgalentine007 6y ago
  I have a TPMS programming tool (ATEQ QuickSet) and reader (Autel TS401), because I like to swap my winter / summer tires on my own. The TPMS light came on one day and inflating tires didn't help - I used the reader and found that one sensor's ID had changed. When I compared the ID (it was in hex) to the last programming - it was a single bit off. I couldn't reprogram the sensor itself, but I was able to update the ECU with the changed ID using the ATEQ. I live in Denver but spend a lot of time skiing around 11k feet, maybe the higher elevation means more radiation.
  - dharmab 6y ago
    Similar story, we saw that one particular IP address in a public cloud network had a 3% TLS handshake error rate. We diverted traffic and then analyzed with wireshark. We found one particular bit was being pulled low (i.e. 0 -> 0 and 1 -> 0). HTTP connections didn't notice but TLS checksum verifications would randomly fail. Had a hell of a time convincing the cloud provider they had a hardware fault- turned out to be a bug which disabled ECC on some of their hardware. Aside: I'm surprised you got a TPMS programming tool instead of a set of steelies. Big wheels? Multiple winter vehicles?
    - jgalentine007 6y ago
      I have 2 cars. I like the TPMS to work since I've had 3 nails in tires in 4 years (newer construction area). Also the TPMS light in my impreza is almost as bright as the sun.
  - cmehdy 6y ago
    IIRC higher altitudes definitely register more radiation, the latitude effect being relatively minor in comparison. Interestingly enough, average background radiation is actually the highest in the US exactly where you are[0] and I've seen comments (on a few websites talking about it) ranging from "the Rockies are loaded in Uranium" to "what about the Rocky Flats nuclear weapons site". Perhaps you're exactly in the right place to be an advocate for ECC :) [0] http://www.radiationnetwork.com/ http://www.radiationnetwork.com/

amluto 6y ago

Hah. My oven’s bottom unit stopped working. I strongly suspect a bit flip.

jjeaff 6y ago

How in the world would you ever know that problem was caused by a bit flip and not just one of the countless other reasons that a sensor could fail?

jgalentine007 6y ago
I have a TPMS programming tool (ATEQ QuickSet) and reader (Autel TS401), because I like to swap my winter / summer tires on my own. The TPMS light came on one day and inflating tires didn't help - I used the reader and found that one sensor's ID had changed. When I compared the ID (it was in hex) to the last programming - it was a single bit off. I couldn't reprogram the sensor itself, but I was able to update the ECU with the changed ID using the ATEQ. I live in Denver but spend a lot of time skiing around 11k feet, maybe the higher elevation means more radiation.
- dharmab 6y ago
  Similar story, we saw that one particular IP address in a public cloud network had a 3% TLS handshake error rate. We diverted traffic and then analyzed with wireshark. We found one particular bit was being pulled low (i.e. 0 -> 0 and 1 -> 0). HTTP connections didn't notice but TLS checksum verifications would randomly fail. Had a hell of a time convincing the cloud provider they had a hardware fault- turned out to be a bug which disabled ECC on some of their hardware. Aside: I'm surprised you got a TPMS programming tool instead of a set of steelies. Big wheels? Multiple winter vehicles?
  - jgalentine007 6y ago
    I have 2 cars. I like the TPMS to work since I've had 3 nails in tires in 4 years (newer construction area). Also the TPMS light in my impreza is almost as bright as the sun.
- cmehdy 6y ago
  IIRC higher altitudes definitely register more radiation, the latitude effect being relatively minor in comparison. Interestingly enough, average background radiation is actually the highest in the US exactly where you are[0] and I've seen comments (on a few websites talking about it) ranging from "the Rockies are loaded in Uranium" to "what about the Rocky Flats nuclear weapons site". Perhaps you're exactly in the right place to be an advocate for ECC :) [0] http://www.radiationnetwork.com/ http://www.radiationnetwork.com/