1997 Toyota camry V6

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Old 07 Jan 2007, 03:51 pm   #1 (permalink)
Mohan
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Default 1997 Toyota camry V6

I am seeing a check engine light on since last few days in my 1997
camry V6. I went to local mechanic and he peformed a free scan in front
of me. It is showing up 2 codes P420 and P1780. The mechanic mentioned
following probable problems for these codes.

P420 - Catalytic converter is bad or O2 sensor could be bad
P1780 - Park N. switch could be bad or the car computer could be bad.

The mechanic is saying he would charge $145 just to find out the exact
problem.

Can somebody please guide me how I can find out the exact problem with
spending less $?

Thanks
Mohan

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Old 07 Jan 2007, 04:28 pm   #2 (permalink)
EdV
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Default Re: 1997 Toyota camry V6

Besides the check engine light, what problem are you experiencing with
the car?

On Jan 7, 1:51 pm, "Mohan" <mohan_maha...@yahoo.com> wrote:
> I am seeing a check engine light on since last few days in my 1997
> camry V6. I went to local mechanic and he peformed a free scan in front
> of me. It is showing up 2 codes P420 and P1780. The mechanic mentioned
> following probable problems for these codes.
>
> P420 - Catalytic converter is bad or O2 sensor could be bad
> P1780 - Park N. switch could be bad or the car computer could be bad.
>
> The mechanic is saying he would charge $145 just to find out the exact
> problem.
>
> Can somebody please guide me how I can find out the exact problem with
> spending less $?
>
> Thanks
> Mohan


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Old 07 Jan 2007, 07:23 pm   #3 (permalink)
Mark A
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Default Re: 1997 Toyota camry V6

"Mohan" <mohan_mahajan@yahoo.com> wrote in message
news:1168206694.270864.295910@42g2000cwt.googlegro ups.com...
>I am seeing a check engine light on since last few days in my 1997
> camry V6. I went to local mechanic and he peformed a free scan in front
> of me. It is showing up 2 codes P420 and P1780. The mechanic mentioned
> following probable problems for these codes.
>
> P420 - Catalytic converter is bad or O2 sensor could be bad
> P1780 - Park N. switch could be bad or the car computer could be bad.
>
> The mechanic is saying he would charge $145 just to find out the exact
> problem.
>
> Can somebody please guide me how I can find out the exact problem with
> spending less $?
>
> Thanks
> Mohan


A Toyota dealer will diagnose the problem without charging you. Most likely
cause is O2 sensor.


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Old 07 Jan 2007, 08:40 pm   #4 (permalink)
toyomoho
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Default Re: 1997 Toyota camry V6


P1780- Short in Park/Neutral switch circuit or bad switch. The computer
is detecting the switch is ON during driving or is giving an indication
of being in two gears at once.

The 0420 code is stating the converter is not functioning as it should
based on the signals from the 02 (or A/F sensors) before and after the
cat. The cat could be bad, one of the sensors (02, A/F), exhaust
system problem.

The service manual at the link below provides a great amount of detail
on these codes. Download the Gen_4, Diagnostics Section. The Toyota
dealer should be able to run down the problems using their hand held
diagnostics tester.

http://oregonstate.edu/~tongt/camry


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Old 08 Jan 2007, 09:25 pm   #5 (permalink)
Mohan
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Default Re: 1997 Toyota camry V6

Thanks all. Besides check engine light there is no other problem with
the car. I used the car for about 100 miles after the check engine
light came on and it is still running smooth.

toyomoho wrote:
> P1780- Short in Park/Neutral switch circuit or bad switch. The computer
> is detecting the switch is ON during driving or is giving an indication
> of being in two gears at once.
>
> The 0420 code is stating the converter is not functioning as it should
> based on the signals from the 02 (or A/F sensors) before and after the
> cat. The cat could be bad, one of the sensors (02, A/F), exhaust
> system problem.
>
> The service manual at the link below provides a great amount of detail
> on these codes. Download the Gen_4, Diagnostics Section. The Toyota
> dealer should be able to run down the problems using their hand held
> diagnostics tester.
>
> http://oregonstate.edu/~tongt/camry
>
>
> --
> toyomoho
> ------------------------------------------------------------------------
> toyomoho's Profile: http://www.toyotanation.com/forum/me...p?userid=59151
> View this thread: http://www.toyotanation.com/forum/sh...d.php?t=173671


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Old 09 Jan 2007, 07:45 pm   #6 (permalink)
johngdole@hotmail.com
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Default Re: 1997 Toyota camry V6

Oxygen sensors can only be accurately tested in the labs. The sensors
can go bad and not set sensor related codes. Denso heated oxygen
sensors since 1997 have cost Toyota, Honda and many owners $$$$$ on
ruined catalytc converters.

Assuming you don't have exhaust pipe leaks or other tuneup related
problems and the converter works (not falling apart on the inside, able
to reduce emissions to the very low end of the range, etc) then it's
most likely the sensors. I know because with Bosch planar sensors I
managed to rid a P0420 problem when TSB recommended $800-1000 cat
replacement.

If you need sensors, go with the best in class Bosch.
http://www.boschautoparts.com/Products/OxygenSensors/

The Bosch universal type for this application is $75 each (if you
isolate it to the sensors you should replace all three) but requires
splicing the old connector onto the new sensor. But it's the excellent
planar type that resists contamination much better than the outdated
Denso thimble junk.

Planar design:
http://www.boschautoparts.com/Produc...s/PlanarO2.htm



Mohan wrote:
> I am seeing a check engine light on since last few days in my 1997
> camry V6. I went to local mechanic and he peformed a free scan in front
> of me. It is showing up 2 codes P420 and P1780. The mechanic mentioned
> following probable problems for these codes.
>
> P420 - Catalytic converter is bad or O2 sensor could be bad
> P1780 - Park N. switch could be bad or the car computer could be bad.
>
> The mechanic is saying he would charge $145 just to find out the exact
> problem.
>
> Can somebody please guide me how I can find out the exact problem with
> spending less $?
>
> Thanks
> Mohan


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