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From: E. Meyer on 2 Jul 2010 15:38
On 7/1/10 5:09 PM, in article Xns9DA8B8A2DADE7tegger(a)208.90.168.18, "Tegger"
<invalid(a)invalid.inv> wrote:

> "E. Meyer" <epmeyer50(a)msn.com> wrote in
> news:C852426C.1CF3F%epmeyer50(a)msn.com:
>
>
>>>
>>
>> Honda DOES use P0170. It is the "Temporary DTC" for both P0171 and
>> P0172. This according to the FSM for the '00 Acura TL.
>>
>>
>
>
>
> That's odd.
>
> I have TSB 03-020. This is Honda's official OBD-II DTC list as of
> March 29, 2003.
>
> The TSB specifically says:
> "This is a list of all DTCs for all OBD II models. No one model has all
> these DTCs."
>
> P0170 is NOT listed.
>
> Can you give some details on the "Temporary DTC" thing?
>
I can't find any specific explanation of it in this particular FSM ('99-'00
TL). The chart of DTCs has three numbers for each condition: a Pxxxx
number, a different number that will flash on the MIL light if the SCS
connector is shorted and occasionally a "temporary DTC" that has yet another
Pxxxx number for some conditions. Its the "temporary DTC" column is sparse,
but these two conditions (P0171 & P0172) are filled with P0170.

From: Tegger on 2 Jul 2010 16:45
"E. Meyer" <epmeyer50(a)msn.com> wrote in
news:C853AA70.1D069%epmeyer50(a)msn.com:

> On 7/1/10 5:09 PM, in article Xns9DA8B8A2DADE7tegger(a)208.90.168.18,
> "Tegger" <invalid(a)invalid.inv> wrote:
>
>> "E. Meyer" <epmeyer50(a)msn.com> wrote in
>> news:C852426C.1CF3F%epmeyer50(a)msn.com:
>>
>>
>>>>
>>>
>>> Honda DOES use P0170. It is the "Temporary DTC" for both P0171 and
>>> P0172. This according to the FSM for the '00 Acura TL.
>>>
>>>
>>
>>
>>
>> That's odd.
>>
>> I have TSB 03-020. This is Honda's official OBD-II DTC list as of
>> March 29, 2003.
>>
>> The TSB specifically says:
>> "This is a list of all DTCs for all OBD II models. No one model has
>> all these DTCs."
>>
>> P0170 is NOT listed.
>>
>> Can you give some details on the "Temporary DTC" thing?
>>
> I can't find any specific explanation of it in this particular FSM
> ('99-'00 TL). The chart of DTCs has three numbers for each condition:
> a Pxxxx number, a different number that will flash on the MIL light if
> the SCS connector is shorted and occasionally a "temporary DTC" that
> has yet another Pxxxx number for some conditions. Its the "temporary
> DTC" column is sparse, but these two conditions (P0171 & P0172) are
> filled with P0170.
>



And right you are. It turns out the "temporary DTC" is set during the
initial detection (first trip) for two-trip codes. If the same problem is
detected on the second trip, a "mature" DTC is then set. In many cases, the
temporary DTC is the same as the mature DTC, but P0171/172 are sometimes
exceptions to that.

Only some models use P0170 as the temporary DTC for P0171/172. I have the
Honda FSM for the OP's car, and it makes zero mention of any "temporary"
DTCs. Its DTC list does not show a P0170. I have Honda docs for Civics
2000-and-up that do list temporary DTCs, but the temp. DTCs for P0171/172
are the same as the mature ones.

I'd have to buy another $10 subscription to Techinfo to be certain if P0170
is valid for the '98 Civic. But since the OP appears to have solved his
issue by installing a new HO2S, it's not worth it.


--
Tegger
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