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1994 Honda Civic Faulty speedometer, CEL for Oxygen Sensor

Tiny
TRDARCH
  • MEMBER
  • 1994 HONDA CIVIC
Electrical problem
1994 Honda Civic Automatic 185000 miles

I have had an issue with my speedometer for sometime. Sometimes it shows my correct speed, then other times it just shows 0. I have replaced the Speed Sensor twice and it is still bad. Recently the CEL came on. The code was for the oxygen sensor. What do you think the issue is? Are the O2 and Speedometer problem related?
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Wednesday, January 13th, 2010 AT 11:42 AM

5 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi trdarch,

Thank you for the donation.

The VSS and O2 sensors are on different circuits so are not related.

After replacement of the VSS, did the problem go away for a short while before coming back?

If the VSS is not at fault, you would need to check the wire harness. Some connection might be poor somewhere causing the speedometer to fail intermittently.

What was the exact trouble codes retrieved for the O2 sensor?
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Wednesday, January 13th, 2010 AT 1:21 PM
Tiny
TRDARCH
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After replacing the VSS the first time, the problem did go away but returned. However, after the last replacement, the VSS issue did not go away.

The code I am pulling is a code 41- primary O2 sensor heater malfunction.

Thanks again.
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Wednesday, January 27th, 2010 AT 7:38 PM
Tiny
KHLOW2008
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What is the engine variant? 1.5, 1.6 or 1.5 VX?

Was the VSS replaced new or used? Have you tested the VSS functions on the vehicle?

Would you be able to perform tests with a DVOM if the procedures are given to you?
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Thursday, January 28th, 2010 AT 7:47 AM
Tiny
TRDARCH
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I think it's a 1.6 vTECH engine.

Both the VSS I have used have been used. I would probably be able to preform some tests if given instructions.

Thanks again.
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Thursday, January 28th, 2010 AT 12:41 PM
Tiny
KHLOW2008
  • MECHANIC
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Used VSS might not be reliable and I would not rule out the possibility of a faulty unit.

Here are the diagnostic procedures for the VSS and HO2S.

Hope there are good if not let me know and I will send them in PDF format to your email.


https://www.2carpros.com/forum/automotive_pictures/192750_Code17_94CivicFig37a_1.jpg



https://www.2carpros.com/forum/automotive_pictures/192750_Code17_94CivicFig37b_1.jpg



https://www.2carpros.com/forum/automotive_pictures/192750_Code17_94CivicFig38_1.jpg



https://www.2carpros.com/forum/automotive_pictures/192750_Code41_94CivicFig48a_1.jpg



https://www.2carpros.com/forum/automotive_pictures/192750_Code41_94CivicFig48b_1.jpg



https://www.2carpros.com/forum/automotive_pictures/192750_Code41_94CivicFig49a_1.jpg



https://www.2carpros.com/forum/automotive_pictures/192750_Code41_94CivicFig49b_1.jpg



https://www.2carpros.com/forum/automotive_pictures/192750_Code41_94CivicFig50a_1.jpg



https://www.2carpros.com/forum/automotive_pictures/192750_Code41_94CivicFig50b_1.jpg

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Friday, January 29th, 2010 AT 5:48 AM

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