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Cadillac Catera Maintenance & Repair

1218 messages,  Last post on Dec 03, 2009 at 4:38 PM

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#1108 of 1218 Code U2108 by ledc101 Jul 08, 2009 (6:44 am)
so is that what you do whn the U2108 code is one because on my 2000 cadillac catera has the ABS,TC CHECK ENGINE, and my speedometeor, and my coolant light is on and i dont know what to doo.... i got it checkd for the codes and it says U2108 so how do i solve it i need help plzzz thank??? Replies to this message: gnguru (Jul 08, 2009 9:00 am) phil2400 (Jul 08, 2009 4:28 pm) ledc101 (Jul 09, 2009 9:01 pm) dallasdude1 (Jul 11, 2009 5:09 pm)
#1109 of 1218 Re: Code U2108 [ledc101] by gnguru Jul 08, 2009 (9:00 am)
Replying to: ledc101 (Jul 08, 2009 6:44 am) Any "U" code means there is a communication problem. This is the ability of all the modules of the vehicle to communicate with each other. Any time you get a "U" code stored, it is necessary to connect a scan tool capable of looking at every module on the vehicle to determine where the problem is. If you don't have a capable scan tool, I would suggest a top notch repair facility or even your Cadillac dealership. Actually, once you diagnose the cause of the "U" code, there is a good chance it may clear up all your other problems. Good luck.
#1110 of 1218 Re: Hey gn guru [calicago] by gnguru Jul 08, 2009 (9:30 am)
Replying to: calicago (Jul 07, 2009 10:03 am) I'm not really exactly sure what you're saying. When you say "cps", I assume you're referring to the Crankshaft Position Sensor which is actually called a "CKP", right? When and if you installed a new CKP, are you sure the wiring is snug and tight with no breaks in the wiring and generally it is better to reroute the harness and not put it back the same way as the factory installation. When I say reroute it, the main thing is to be sure that it doesn't come into contact with any of the exhaust manifold. If no signal is getting to the CKP, it doesn't know that the engine is cranking and will not kick in the fuel pump which would mean no fuel. Also, have you changed out the in-line fuel filter? Might try that next. Replies to this message: calicago (Jul 08, 2009 8:50 pm)
#1111 of 1218 Re: Code U2108 [ledc101] by phil2400 Jul 08, 2009 (4:28 pm)
Replying to: ledc101 (Jul 08, 2009 6:44 am) This code (U2108) is a communications error with the ABS module. This goes hand-in-hand with the TC and ABS lights and code P0500. The VSS is wired to the ABS first, then carries over to the ECU and speedometer. I found this out the hard way with a buddy's Catera. When the ABS module has communications errors, the speedometer loses signal from the Vehicle Speed Sensor (VSS).   There is hope. We called www.bba-reman.com, and they were able to fix the ABS controller. This is the black plastic box on the ABS module mounted down on the car's frame rail on the driver's side. They have DIY instructions on their website to remove the controller without removing the valve assembly and motor. This means you don't need to remove any brake lines or crack any of the lines open. Mail off the controller, and they rebuild it, test it, and warranty the work for a year, and send it back. According to them, you can still drive the car without the module. They charged us $169, which included return postage. This fixed the ABS, TC and CEL lights.   For the coolant light, check the coolant level in the reservoir. If it is fine, then the sensor may be bad. It is mounted to the bottom of the reservoir. Replies to this message: ledc101 (Jul 09, 2009 9:01 pm)
#1112 of 1218 Re: Hey gn guru [gnguru] by calicago Jul 08, 2009 (8:50 pm)
Replying to: gnguru (Jul 08, 2009 9:30 am) Yes Yes and YES new fuel filter new relays Have not Performed the other test yet being the service manual is very vauge on details and pics Before I replace a shut off vavle or pressure swich I will finish the testing Just thought you where more incline with the fuel system
#1113 of 1218 Re: Code U2108 [phil2400] by ledc101 Jul 09, 2009 (9:01 pm)
Replying to: phil2400 (Jul 08, 2009 4:28 pm) thanks aloot i apppreciate it aloot so thankk u veryy muchhh
#1114 of 1218 2001 cadi catera by dgaw Jul 11, 2009 (2:18 pm)
i need to know what codes po432 &po422 mean check eng light on and coolant light on but full what can problem be car runs fine to me so if anybody can help please and thank you Replies to this message: dallasdude1 (Jul 11, 2009 4:54 pm) dgaw (Jul 12, 2009 2:46 pm) acurry (Jul 12, 2009 9:00 am) dgaw (Jul 12, 2009 2:26 pm) dallasdude1 (Jul 18, 2009 11:22 am) and 1 more...
#1115 of 1218 Re: 2001 cadi catera [dgaw] by dallasdude1 Jul 11, 2009 (4:54 pm)
Replying to: dgaw (Jul 11, 2009 2:18 pm) The 400 series codes means that your O2 sensor is sending a message of a bad converter or maybe the O2 sensor is bad. This could be a number of things and could be ruining your converter if not addressed.   The most common cause is contamination of the catalyst because the engine is burning oil or leaking coolant internally (leaky head gasket or a crack in a combustion chamber or cylinder). Converters can also be damaged if they overheat due to ignition misfiring that allows unburned fuel to pass through into the exhaust (check for a fouled spark plug or bad plug wire). The same thing can happen if the engine has a bad exhaust valve that leaks compression into the exhaust (check compression). Replies to this message: dgaw (Jul 12, 2009 2:46 pm)
#1116 of 1218 Re: Code U2108 [ledc101] by dallasdude1 Jul 11, 2009 (5:09 pm)
Replying to: ledc101 (Jul 08, 2009 6:44 am) Code U2108 is a communications error between the ECM and ABS module.   How old is the Catera? How many miles? Do you ever have the brake fluid changed?
#1117 of 1218 Re: 2001 cadi catera [dgaw] by acurry Jul 12, 2009 (9:00 am)
Replying to: dgaw (Jul 11, 2009 2:18 pm) im not sure what the codes mean. but as for the coolant light you will have to replace the whole jug it runs about 40.00 at the dealer the sensor on the bottom of it is bad thats why your light is staying on. Replies to this message: dgaw (Jul 12, 2009 2:26 pm) dallasdude1 (Jul 18, 2009 11:22 am) dgaw (Jul 19, 2009 1:06 am)

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