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Code P0138?

 
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Old 08 Apr 2015, 07:27 am
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Default Code P0138?

2004 PT. What does this code refer to? I just bought this car used two weeks ago from a gentleman who took meticulous care of the car (he had a folder of every single service ever performed on the car, which I now have). The light came on in the middle of driving but the car is still operating normally.

I have to take a trip from NYC to Philadelphia and back over the next two days and I want to know if I will be able to make that trip without damaging the car? My mechanic can't get me in until next week.

Thanks!
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Old 08 Apr 2015, 07:46 am
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Default Re: Code P0138?

I got this from an earlier post:

Quote:
The Heated Oxygen Sensor (2) located rear of catalytic converter produces an output signal relative to oxygen storage capacity of catalytic converter. Ho2S 2 signal is less active than signal produced by front oxygen sensor. This code sets when HO2 Sensor voltage is greater than 999 mV for more than 2 minutes (time depends on model. Could be as high as 4 minutes)

Symptoms: There may be no noticeable symptoms except for MIL illumination. Possible high fuel pressure can over rich the system.

Causes: A code P0138 may mean that one or more of the following has happened:

Faulty O2 sensor
Short to battery voltage in O2 sensor signal circuit
High fuel pressure (not as likely)
Possible SolutionsHere are some potential solutions:

Replace O2 sensor
If you replace the O2 sensor, consider getting an OEM sensor from the dealership. Some of the aftermarket versions seem to cause issues.

PS: Welcome to the forum from the great sovereign state of Arkansas!

You should tell us about yourself and your PT in the new members section.
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Old 08 Apr 2015, 07:52 am
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Default Re: Code P0138?

Quote:
Originally Posted by Handy_Cruiser View Post
I got this from an earlier post:



If you replace the O2 sensor, consider getting an OEM sensor from the dealership. Some of the aftermarket versions seem to cause issues.

PS: Welcome to the forum from the great sovereign state of Arkansas!

You should tell us about yourself and your PT in the new members section.
Thanks, Handy! I guess my only concern is will I do further damage to my engine/cat converter if I drive it to Philly and back (about 2 hours each way highway speeds)? Of course the code came up the day before I need to make this trip!
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Old 08 Apr 2015, 08:01 am
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Default Re: Code P0138?

Likely not.

The worse case is likely that the engine will run a little rich and the fuel mileage will be poor. It might cause carbon build up and shorten the life of spark plugs and other sensors over the long run. But for a short trip, I would not anticipate any thing too bad.
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Old 08 Apr 2015, 08:02 am
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Default Re: Code P0138?

Quote:
Originally Posted by Handy_Cruiser View Post
Likely not.

The worse case is likely that the engine will run a little rich and the fuel mileage will be poor. It might cause carbon build up and shorten the life of spark plugs and other sensors over the long run. But for a short trip, I would not anticipate any thing too bad.
Thanks, Handy!! You have been a huge help! I'm taking it in to get the new o2 sensor early Monday morning, so hopefully no issues before then!
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