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OBD1 codes 16 and 24?

Tiny
HILLSIX
  • MEMBER
  • 1995 MAZDA 626
  • 2.5L
  • 6 CYL
  • 2WD
  • MANUAL
  • 225,000 MILES
Have replaced EGR valve and still have a code 16, also code 24?
Friday, August 12th, 2022 AT 11:16 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,833 POSTS
16 - EGR Function Sensor the code 24 is for the airbag system. I have seen this problem before, the EGR valve passages being clogged up will cause the EGR system not to work. I would remove the EGR valve and look with a flashlight to see if the passages were clogged up. Also, you can try to start the engine and see if you can hear the exhaust. Let me know what you find.
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Saturday, August 13th, 2022 AT 10:28 AM
Tiny
HILLSIX
  • MEMBER
  • 2 POSTS
The EGR valve was brand new out of the factory box. YouTube believes that my sensor is bad. The resistant value is low from pins A to B and high from pins A to C.
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Saturday, August 13th, 2022 AT 3:49 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,833 POSTS
Yep, that could be, here is how you can test the sensor to confirm the failure.
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Monday, August 15th, 2022 AT 11:31 AM

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