Oxygen sensor testing

2003 MAZDA PROTEGE
2WD • MANUAL
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JAMES CROTHERS
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  • 1 POST
How can I test an oxygen sensor for a 2003 Mazda Protege?
Jan 10, 2011 at 6:50 PM
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DOCFIXIT
  • ✓ASE Certified Mechanic
  • 18,828 POSTS
  • ASE Certified Mechanic
See diagram from term"A" to "B" place analog volt meter start car increase speed to 3000 rpms volts .5 to .7 increase and decrease engine rapidly volt meter should go up and down. Then test resistence from "C" to "D" front O2 5.6 ohms rear O2 15.6 ohms
Jan 10, 2011 at 6:58 PM
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