DTC Codes

[Mr. Smith]

I had my SES light come on this morning while going to work. I stopped by my nearest Advance and had them check it out. I had the following codes.

 

History DTC P0102

MAF Circuit Low Input.

MIL not requested.

 

I cleaned the MAF as the little bobbins looked dirty on the air cleaner side. All voltages were correct at the plug for the MAF as well. So I hope that fixed that code.

 

History DTC P0141 & P0161

Bank 1 Sensor 2 and Bank 2 Sensor 2

O2 Sensor heater circuit malfunction.

MIL Requested

 

This seems to be an intermittent problem and I checked the voltages and appear to be good. I am going to change these suckers out as they have 95K on them. They usually will come on when it is cold outside. It was in the high 40's this am.

 

Transient DTC P0340

Camshaft Position Sensor A Bank 1

Circuit Malfunction

MIL not Requested

 

I have no idea what is bringing this on or how to check it. I haven't had the distributer out for over a year and never had this code before. In fact the only codes I have had were the 141 & 161 codes. Can someone point me in the right direction to troubleshooting the P0340?

 

Thanks

[JimG]

The GM manual states:

"An intermittent CMP sensor signal may cause DTC P0340 to set. Wiggle the wiring harness with the engine running and observe the Cam Signal Missed parameter of the scan tool. If the parameter indicates anything other than 0, there is an intermittent connection".

Right, so I'm assuming you don't have a Tech 2 handy.

I'm going to scan in the pages of the manual that apply to this DTC and you can determine if they're helpful or not (should be up within an hour or so).

[sjspor]

Mr. Smith... Please add you year and engine to the post.

[Mr. Smith]

I guess that would help

 

1997 GMC 5.7

 

Thanks JimG

 

 

Mr. Smith...  Please add you year and engine to the post.

 

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[JimG]

OK, Mr. Smith,

 

Click this: DTC P0340

This is all the info they offer for that DTC. Please bear in mind this info was pulled from a 2003 model year service manual. I doubt there's been much change in the design/wiring/etc of the CMP. However I wouldn't trust the pinouts of the ECMs to be the same.

Hope this helps you!

[Mr. Smith]

Thank you very much. I will look the file over and see what I can do from there.

 

 

OK, Mr. Smith,

 

Click this:  DTC P0340

This is all the info they offer for that DTC.  Please bear in mind this info was pulled from a 2003 model year service manual.  I doubt there's been much change in the design/wiring/etc of the CMP.  However I wouldn't trust the pinouts of the ECMs to be the same.

Hope this helps you!

 

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