[DeTomaso] NPC Check Engine Light

[Doug Braun]

Art,

The mechanical shock from the rock can damage the sensor without any visible
damage.  First thing I'd try is to buy a new sensor and install it.  The
worst that will happen is you'll have a spare sensor.  Besides, sooner or
later, that sensor is destined to wear out.  If the new senor doesn't fix
it, suspect the wiring as it may have been damaged by the rock.

PS: The "secondary" name for the sensor likely means it's one of two that is
farther downstream in the exhaust and likely after the catalytic converter.
 It purpose may only be to tell the ECU when the cat is lit.

Doug Braun
blue 73L #5505

On Thu, Oct 6, 2011 at 4:55 PM, Art Stephens <artstephens at verizon.net>wrote:

> Hello guys,
> I was driving my new Honda CR-Z  Hybrid thru Death Valley the other night
> when I came around a curve and found a rock in the middle of my lane. I
> wasn’t able to avoid it so I straddled it but it was too tall and banged up
> the bottom of my car. As soon as that happened I got a check engine light
> which turns out to be a Secondary HO2S Circuit Fault (sensor2), O2 sensor as
> near as I can figure. I can see no apparent damage to the sensor but the
> muffler has a big dent in it. Is the dented muffler the likely cause of the
> problem, increased heat due to the restriction, or does the circuit fault
> mean there is no signal from the sensor, or something else? I know if I take
> it to the dealer that they will want to replace the muffler and tail pipe
> for a thousand dollars and still no guarantee of solving the problem. Any
> thoughts?
>
> Thanks,
> Art
>
>
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