Rep Power: 0

I had autozone pull a P0134 code after the engine light came on in my 03 Civic SI 2.0L which reads as follows:
So, how do I go about testing for a short circuit or poor connection?

And if it IS a faulty sensor, is it the one in the upper exhaust pipe? or the one sticking out of the converter?
thanks

 
Rep Power: 518

Oh, I remember you now......Are you Canadian?


Sensor #1, upstream, or B1S1, is the first one in the exhaust. The one in front of the cat element, not in or behind the cat element.

P0134, A/F Sensor, No Activity Detected

99% just need a new sensor. It is not an Oxygen sensor, it is an Air-Fuel Ratio sensor.
Similar appearance, similar function, vastly different in construction and operation.

Use DENSO, NTK, or factory parts (Denso and NTK are both OEM).
Item #17 here (for US cars):
http://www.hondaautomotiveparts.com/...PIPE+-+MUFFLER

No. Bosch. Evar.

HTH

 
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So is it worth checking out the existing sensor for a short circuit or anything first before throwing a new part at it?

 
Rep Power: 518

Tough to say.
Look the wiring over real good, make sure it isn't rubbing on anything or rubbed through the insulation and exposed bare wires anywhere.

I watch data on the scanner. If the sensor shows activity at all, then the wiring is probably ok and the sensor itself is faulty.
Most of these sensors fail for this particular code intermittently, so catching it in the middle of a failure is tough.

I keep spares of many of the sensors in my toolbox, makes it easy to just plug one in and check.



I would probably just toss a sensor at it.

 
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Yeah, the engine light comes on sometimes, but not every time. Sometimes it even pops on after driving for a while. It seems really intermittent.

 
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So you'd put a new sensor in there even though it's seemingly intermittent?

 
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Bought the new part anyways.. anyone know of a good tutorial?

 
Rep Power: 518

Yes.


Not really. The hex is 7/8 inch, like any other O2 sensor.

Here are a couple examples of the special tools available, pick whatever fits your needs.


HTH

 
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I Have a 2003 SI 2.0 L, I have replaced both sensors & the "mant. req." light is still on, the engine decoder says no activity detected, any ideas ?

 
Rep Power: 518

Why on Earth would you just replace a pile of sensors without a good reason?
Oh wait, nevermind.


The maint req'd light is the oil change reminder.
Most places that do oil changes don't remember to reset it.
Reset instructions are in your owners manual.