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Engine light -Code P2901 read on Genisys scan tool

No apparent cause- Can't find any info on this code.
2003 Cadillac CTS with 3.2L and 86,000 mi.

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  • Dave Real
    Dave Real May 11, 2010

    I have checked all of my reference sites and found no such code.


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  • 61 Answers

DTC P2501
Generator L-Terminal Circuit High Voltage
Maybe it was this one?

Posted on Jan 28, 2009

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I have a 2004 Cadillac CTS shifting a little hard check engine light is on due to a dirty fuel injector just bought the car it's nice but can anyone help a little?

check engine light is on due to a dirty fuel injector ??? What code ? Shifting hard could be caused by a lot of thing's having it hooked up to a professional type scan tool to check certain sensor inputs to the PCM/TCM would be the first step in a diagnostic trouble shooting process. Cadillac's are a different breed of vehicle then your normal vehicle . If you don't have or know about a professional type scan tool . not the one they use at auto zone .Your best bet , take it to a Cadillac dealer. I have over thirty years experience at a Cadillac dealer . You don't have the knowledge or tools to test it .

Mar 21, 2017 | Cadillac Cars & Trucks

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I have a 2003 Cadillac cts getting codes p1795 p1780 p1779 p2176 what can be possible problems to fix them?

code p 2176 refers to throttle actuator control(TAC) system--idle position not learned ===causes basic setting not carried out
code p 1795 is CAN bus--throttle body position
code p 1780 is park/neutral position (PNP) switch circuit engine torque signal circuit
code p 1779 is engine torque delivered to TCM signal
go google and type in cadillac fault codes and find a site that has all the codes listed

Oct 03, 2016 | 2003 Cadillac CTS

1 Answer

What does code po700 mean on a cadillac cts 2006


P0700 is an informational code only. It doesn't point to a direct fault in the engine, only a general fault in the transmission. More diagnosis is necessary to identify what the transmission fault is. This requires a scan tool that will communicate with the transmission module.
More often then not, the cause of this code is that there is a transmission problem of some kind. The TCM detected the problem and set a code. P0700 means that a fault code is stored in the TCM. However this doesn't rule out the possibility of a failed PCM or TCM (unlikely).
For a P0700 the only real solution is to acquire a scan tool that will communicate with the transmission control module. Extracting this code from the TCM will be the first step in repairing the fault in the transmission.

Apr 02, 2014 | 2006 Cadillac CTS

2 Answers

Cadillic 2003 cts won't start

Temperature sending unit could be sending erratic signal.

Nov 22, 2013 | 2003 Cadillac CTS

1 Answer

2003 Cadillac CTS won't start after disconnecting battery

Don't do that again! You will need to re-boot the on board computer system by entering a code. Call your nearest Cadillac dealer.

Nov 28, 2011 | 2003 Cadillac CTS

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Hello: None known. Check the gas cap. Find out what code is causing the light to come on. Go to Auto Zopne or other parts store and get them to read the code.

May 02, 2011 | 2004 Cadillac CTS

2 Answers

My cadillac cts 2004 airbag service warning light is on,can anyone tell me how to reset it. I would appreciate if anyone helps me.

You will need a professional grade scan tool to reset the light.You will need to repair the cause of the light , the failure that set the code.

Feb 12, 2011 | 2004 Cadillac CTS

1 Answer

My engine light is on told it was oxgen sensors is that right

If they connected a scan tool to it and retrieved the error code from the computer and thats what it told them more than likely it is. Depending on what code it threw it could be something causing it to throw O2 code.

Sep 13, 2009 | 2003 Cadillac CTS

1 Answer

Check engine light comes on and car starts to downshift hard

Please take the car for a scan to reveal any problem/ error codes causing this.

Good luck,

Jul 15, 2009 | 2003 Cadillac CTS

1 Answer


most of the time its the sensor that cause this,id try replacing the sensor on it,that usually fixes that code,but you have to get the code cleared off with a scanner ,and then re-scan it to make sure it doesn't come up again,good luck with it.

Jun 29, 2008 | 2005 Cadillac CTS

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