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No speedometer

Tiny
JDUBEST23
  • MEMBER
  • 2014 MAZDA 3
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 45,000 MILES
While driving my speedometer stopped working, power steering feels like it went out. ABS, check engine, brake, flat tire, all lights that popped up on the dash. RPM gauge still works, it drives like normal minus power steering. I'm thinking maybe the speed sensor?
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Sunday, August 23rd, 2015 AT 1:22 PM

6 Replies

Tiny
CATAFINA
  • MECHANIC
  • 167 POSTS
Could be the vehicle speed sensor, however scanned the computer for codes start here.
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Sunday, August 23rd, 2015 AT 4:14 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check battery for condition including load test a battery in poor shape will cause that.
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Monday, August 24th, 2015 AT 7:30 AM
Tiny
JDUBEST23
  • MEMBER
  • 3 POSTS
Im getting a u0121 code, no idea what it means. Hope you can help
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Monday, August 24th, 2015 AT 2:47 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It means you have lost communication between either the steering module or abs/pcm can line a pro needs to definitely scan this to see where it is either a short or bad connection. This should be a warranty issue or if a recent body damage repair it may have painted over ground wire underhood.
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Monday, August 24th, 2015 AT 3:06 PM
Tiny
MARCOPOLO1166
  • MEMBER
  • 1 POST
I'm seeing this issue but only on days where temperature is extremely cold, 10-20°F. What should I do?
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Tuesday, December 12th, 2017 AT 6:47 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 POSTS
Hello,

It sounds like you have an IGN1 relay that is going out which runs the systems that are affected and it will cause a communication error as well. Here is a guide and some diagrams to help you confirm the issue and get it fixed.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (Below)

Please let us know what you find. We are interested to see what it is.

Cheers, Ken
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Sunday, December 17th, 2017 AT 3:21 PM

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