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2003 Cadillac CTS will run for approximately 15 minutes shuts off wont restart for about 30 minutes what could this be

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Sounds like it is stuck in valet mode.

Posted on Apr 15, 2015

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Take to your auto parts store and ask nicely for them to read the ECU (brain) error codes. My guess is a bad switch or connection there to that gets hot enough to separate the contact and cools in 30 min enough to make contact again.

Posted on Apr 15, 2015


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1 Answer

Is it possible for my 2003 CTS to swap engine for CTS V engine? if so, what style and model

It is possible to swap the 3.2 V-6 for the 5.7 V-8 from the 2004-2007 CTS-V (or Z-6 Corvette). You will need to swap out the engine cradle and you will need to use the 6 speed manual transmission that goes with the V-8 and the exhaust manifolds. You will most likely need to swap the PCM and the rear end too. Also keep in mind that the resale value of your heavily modified CTS will be greatly decreased. It would be far easier and cheaper to just trade your CTS for a CTS-V. I am finding 2005 CTS-V models running $15-19,000 on KBB.

Kelley Blue Book

Oct 11, 2014 | 2003 Cadillac CTS

1 Answer

Cadillac cts reads service charging system

Usually this message comes on when the vehicles electrival system is below approximately 10 volts or over 16 volts indicating a charging system malfunction. You should take the vehicle to a trusted automotive repair facility and have the alternator and battery check for proper performance.

Nov 16, 2013 | 2003 Cadillac CTS

1 Answer

2003 cts stalls out when i stop

Sounds like the Crankshaft Position Sensor. Its about a $50 and 30 - 45 minute fix if you are handy with cars.
Try this link.

I did mine in about 30 minutes. I used a 1/4 drive, u-joint and a 12" extension instead of the thumb wheel. Worked great. Good luck and hope this helps.

Apr 24, 2012 | 2003 Cadillac CTS

1 Answer

I have a 2003 Cadillac cts and it cuts off suddenly while driving and when I try to start it wont until a few minutes later

change your crankshft sensor and camshaft sesor same problem with my moms caddilc cts(and one more thing open your gas cap listen for a hissing sound ..get another person too put the vehicle on on but do not start vehicle.....if there is a hissing soung fuel pump is good)

Jan 03, 2012 | 2003 Cadillac CTS

1 Answer

I have a 2003 cts cadillac. only at certain times after the car has been driven awhile it will just shut down for no apparent reason. not flashing any codes whatsoever. after it sits for 20 min or so,...

my cadillac 2003 had the same problem. my fix was the crank shaft sensor went out. the repair man fixed it for me. but it sounds like the same problem i had. hope this helps..

Apr 19, 2011 | 2003 Cadillac CTS

1 Answer

Car cuts off while I am driving...

Yes...this is a sensor problem and will get worse before it gets better. The crankshaft position sensor on the CTS is famous for this. It's located in the engine block under and slightly ahead of the oil filter and is a bugger to get to.
Good luck...i hope this helps.

May 04, 2009 | 2003 Cadillac CTS

3 Answers

2003 cadillac cts

You may have a bad throttle body.

Oct 27, 2008 | 2003 Cadillac CTS

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