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2003 CADILLAC CTS WON'T START. We replaced the battery and
2003 CADILLAC CTS WON'T START. We replaced the battery and the relay but it wont turn over. It doesn't make any sound. No clicking sound or anything. If we bypass the starter relay y using a wire... t… read more
adam warren
adam warren
Master auto tec
130 satisfied customers
Geting codes u1300 u0073 p1629. Try reseting no go u1300 and
try reseting no go u1300 and p;1629 also service theft on and gas gadge and temp not working alone with the t/c … read more
Jerry Newton
Jerry Newton
Cadillac Technician
Vocational, Technical or Trade Scho
1,738 satisfied customers
It just doesnt start. Starter trying to crank, but not
HI. It just doesnt start. Starter trying to crank, but not cranking. Battery is new. Starter checked - working … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
6,965 satisfied customers
The theft deterrent system alert is not shutting off which
The theft deterrent system alert is not shutting off which it's making my gauges not work … read more
Eric
Eric
Retired
N/A
33,956 satisfied customers
Got an 05 CTS, no crank, no start, P1629 & U1300 codes
Got an 05 CTS, no crank, no start, P1629 & U1300 codes obtained with a tech 2. Replaced and programmed the ECM & theft module with no change. Scoped OBD pin 2 connector and got 7 volt pulses. … read more
Chris (aka- Moose)
Chris (aka- Moose)
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Vocational, Technical or Trade School
811 satisfied customers
It's running rough, and the fuel pressure is fluctuating
It's running rough, and the fuel pressure is fluctuating fast between 40 and 50 psi. It also getting codes for misfire and low fuel pressure … read more
Tim Mohr
Tim Mohr
SHOP OWNER
Master's Degree
16,261 satisfied customers
All of the above, service security system and now the key is
All of the above, service security system and now the key is stuck in rhe inital car will not turn over . … read more
Jerry Newton
Jerry Newton
Cadillac Technician
Vocational, Technical or Trade Scho
1,738 satisfied customers
Have a whole bunch of trouble codes no start and can't
have a whole bunch of trouble codes no start and can't remove ignition key. … read more
Tool Hut
Tool Hut
Owner
519 satisfied customers
I have a 2003 Cadilaac CTS with the 3.2l. When I first start
I have a 2003 Cadilaac CTS with the 3.2l. When I first start the car it runs really smooth. It drives great while accelerating. But when the car warms up and I'm stopped at a red light the engine star… read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
6,178 satisfied customers
Theft system is activated and will not start. I've checked
I've checked the battery it's good as are the terminals … read more
BOBBYSS
BOBBYSS
Automotive Repair/Damage Investigator
Associate Degree
14,595 satisfied customers
Key was stuck, got it out with release. Car won't start
Key was stuck, got it out with release. Car won't start because of anti theft system. Please help. … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
6,178 satisfied customers
I had my 2003 Cadillac cts motor changed out first it was
I had my 2003 Cadillac cts motor changed out first it was running fine now 3 weeks later it won't start at all when I put odb2 reader on it says p1626 theft deterrent system hasn't sent the ecm the ri… read more
Tool Hut
Tool Hut
Owner
519 satisfied customers
Cadillac CTS: 2003 Cadillac CTS V6 ATproblems started when
2003 Cadillac CTS V6 AT problems started when engine belt broke. I replace bad tensor pulley and belt. battery got low in the process and now it is having a few computer problems. The key will not rel… read more
Ron
Ron
Automotive Tech
Vocational, Technical or Trade Scho
37,774 satisfied customers
Cadillac cts: I have a 2003 cadillac cts-v6. Several days
I have a 2003 cadillac cts-v6. Several days ago, it had a dead battery. I jumped started it and the battery recharged. The next morning it started, however, it was not left running to recharge the bat… read more
BOBBYSS
BOBBYSS
Automotive Repair/Damage Investigator
Associate Degree
14,595 satisfied customers
Cadillac CTS: Hi, Pete. i have a 2005 cts with a u1300. I can
Hi, Pete. i have a 2005 cts with a u1300. I can communicate with the ecm but it is not showing up on my class 2 message monitor on the scanner. Any ideas. thanks. its a 3.6… read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
30,680 satisfied customers
Cadillac CTS: 2005 CTS 3.6 L wont start, key wont come out
2005 CTS 3.6 L won't start, key wont come out of ignition. Has DTC codes U1300 and P1629 on ECM, U1000 on other modules. ECM has been replaced and we see 0V to +7V squarewave signal on pin 48 with lab… read more
Chris (aka- Moose)
Chris (aka- Moose)
Cadillac Technician
Vocational, Technical or Trade School
811 satisfied customers
Cadillac CTS: brake lights..car wont..wont start..car started
Cadillac CTS 2003, wont start, it is throwing the code u1300, i have tried to locate the exact part which handle U1300 but all i got to know is class 2 data link, i will be happy if someone can speak … read more
carhelpguy
carhelpguy
Technical Assistance Consultant
High School or GED
146 satisfied customers
Cadillac CTS: the car runs smooth again.It..car ran..throttle body
My Cadillac CTS 2003 was not running smooth. I checked the DTC and found them: P0221C, P2176C, P2135C I cleared the DTC codes and the car runs smooth again. It happened before and it was developed to … read more
Jerry
Jerry
Service consultant
Vocational, Technical or Trade Scho
13,107 satisfied customers
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Meet the Experts:

Jerry Newton

Jerry Newton

Cadillac Technician

1,738 satisfied customers

ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.

Dave Nova

Dave Nova

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ASE Master Certification. GM World Class Certification

Gm Tech (Cam)

Gm Tech (Cam)

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1,090 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

John

John

ASE Certified Technician

941 satisfied customers

ASE CERTIFICATIONS A1-A8 & L1 / 40 YEARS AUTOMOTIVE EXPERIENCE

Chris (aka- Moose)

Chris (aka- Moose)

Cadillac Technician

811 satisfied customers

16 years of experience

George H.

George H.

ASE Certified Technician

783 satisfied customers

ASE Master Tech 15+ Years

Don - Mo Lurch

Don - Mo Lurch

Cadillac Technician

705 satisfied customers

GM, Cadillac Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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