Engine/Transmission (1998.5 - 2002) '02 HO error codes

[JWBoothe]

Hi all,



I am a new poster, but not new to the forum. The wife and I just bought an 02 2500 HO 6spd w/60,000mi.



The test drive was great, but when I took physical ownership, the check engine light came on.

When I asked what the code was, the dealer said it was a "low voltage" code and that it righted itself. They checked the battery and the charging system ok. The truck runs great.



Any suggestions on what this could be and what I should be watching/checking for?



Thanks,

Chris

 

[Horsepuller]

I purchased my 02 about 2 weeks ago.



I checked for codes and checked the fuel pressure, along with everything else you need to check when purchasing a used vehicle. The main thing I would be watching is your fuel pressure so that you can keep an eye on the Lift Pump. Do a search re: Lift Pumps and read all about it. Don't get yourself too worked up though, the older the model year the more problems owners seem to have with the LP. I don't read many posts regarding 02's having problems with the LP. But this could be due to the higher mileage of older model trucks.



These are great trucks, congrats!

 

[Bob Wagner]

Chris, welcome to the tdr



cycle the ingnition key 3 time without actually starting the truck and the codes will come up in the odometer.



right the codes down and report back

 

[JWBoothe]

I'll check tonite.



Its great to have a resource like this to share ideas and get answers!



Thanks a ton guys!

 

[BillH]

If you don't have a F/P Gauge, you best get one and keep an eye on it.



I am on my 3rd L/P, and at 49000 miles I may be needing the 4th one.

 

[Bob4x4]

In all reality we are having a fairly high failure rate on the 02 HO's

injection pumps. I have had them fail under 30k. The lift pumps seem to have slowed down some. Keep an eye on your fuel pressure,change the filter on a regular basis and try a little lube additive. It's all you can do.



Bob

 

[JWBoothe]

The error codes are:

P0122 = Throttle position sensor voltage low

P1693 = ???



The dealer is fixing the throttle position sensor this week. What is the other code?

While driving today, twice I lost all power at speeds >35mph. There was absolutely no response from the pedal. When the clutch was depressed, then engaged, power came back as normal. Is this from the TPS?



Thanks again for the info!!

 

[Bob4x4]

yup tps bites the dust



Bob