1998 Tahoe Questions OBD II Codes

[wishpony13]

My husband just did a scan on the Tahoe and wants to know what these codes mean (and in layman terms so I can understand . The codes are P1870 02/03, PO157 01/03 and P1870 03/03. It also came up with Fault - 2 Pend - 1. He also wants to know what he has to do to fix them.
Thanks for your help.

 

[Colabella7077]

I haven't come across those codes. But what you can do is go to a Chevrolet/GM dealership and there is a bulletin that is produced by GM, concerning codes and possible issues that could cause the problem.

 

[maddbrewer]

You can also go to website for the OBD11 scanner and type (the codes) them in there and they will give you a definition.

 

[bsamoul]

As well as using google to find out what they mean

 

[wishpony13]

I have used google to look them up with no luck. I will try looking up the website for the obd II scanner.

 

[peterey2]

the P0157 is a heated O2 sensor low voltage bank 2 code.

and the P1870 is a transmission component slipping.

 

[wishpony13]

So for p1870 when it states 02/03 is that the slip between 2nd and 3rd gear? When we drive the Tahoe after awhile, it will make a clunk when it shifts from 1st to 2nd. So he was wondering what he could check that could be causing the slippage...

 

[peterey2]

youd have to take it to get a scanner hooked up to it to trace it properly. they should start by checking communication from the VCM (vehicle control module) to the TCC (torque converter clutch) solenoid valve for damage. its on the valve body of the tranny. youll have to drop the pan to get to it tho.

the 02/03 that i think you mean inicates the amount of codes you have and what code your viewing. for example, if it reads 01/02. you have 2 codes, and the code on the screen is 1 of 2.

 

[wishpony13]

Okay so is there anywhere there is a picture of when you drop the pan and where the valve body of the tranny is to find the solenoid valve that are damaged? And would you have to replace the solenoid valves or is there something else that can be done?

 

[peterey2]

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