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Stability control reduced and Coolant Leak


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Hello again I nhave a couple of problems I replaced the Knuckle busing like you all said and now after two weeks I get this message and also I have a coolant leak in front of the right front tire. I did get a message said check coolant level should I put more in with the leak not determined?

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Check all the hoses and hose clamps first.

Check the surge tank / overflow tank REALLY WELL...

Sometimes they crack on the bottom.

If you find that it is the actual radiator leaking, I would replace it with a new one.

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A coolant leak onto the wiring harness may cause a module to throw a code. Fix the leak first, then clear the codes and see what comes back.

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-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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thanks again guys the problem was found today the surge tank nipple was cracked and it was leaking from there so I have to replace that Thanks again I love you guys, you know these luxry cars that we drive I wish some of our mechanics did. This site maks the average joe like myself a genuis when it comes to explaining to them when there is a problem with your caddy. They most likely will stick it to ya if you did not explain it. I myself in a wheelchair looks like fresh meat but thanks to you all I have saved my butt. God Blees you all.

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i am getting this message stability reduced I ad the knuckle bushings replaced two weeks ago and should I have replaced the shocks also?

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Never replace anything unless you are sure that it is bad. My car has over 150,000 miles on it and has the original shocks and struts. I had the dreaded head gasket thing a few years ago at 116,500 miles, but other than that very little has needed replacement. My first brake job was at 120,000 miles (I never lived in San Francisco or Seattle!), but I did have to replace my stabilizer links last year.

I'm the one that said that a coolant leak can cause codes by shorting wiring harness connectors, I had a cracked nipple on my surge tank once and it shorted my VSS, causing codes with occasional driveabilty problems that went away when I got a new surge tank. I would hose out the area of the leak, let it dry for a day or two, and start again.

Reset all the codes, do a test drive that includes a cruse at 45 mph or higher for a few minutes, and check them again just before you turn off the engine. Post those codes here and we will look for the rest of the problems.

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-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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It is possible that while the knuckle bushing job was done a strut wire was not connected securely or was dislodged.

Whenever you get a message across you DIC, an associated DTC code has been set.

Check for codes that will more clearly direct us to what is wrong, that is the next thing you should do, get the codes as JIM recommends, but DONT clear them first, post the current codes you have, a code is probably set that will direct us to what is causing the message.

If this does involve the right front strut or abs connector it maybe be wet from the coolant leak as Jim noted, but it may also be related to the knucket job, or something else

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Use the link in my signature block for a Caddyinfo page on instructions. Or, on the A/C console, press <Off> <Passenger Warmer> simultaneously for about 5 seconds until all the dash lights up and watch the DIC for the codes to be listed by module. This puts the DIM into the diagnostic mode.

The codes will be of the form Lnnnn where the letter L is one of P, B, C or U, and nnnn is a four-digit code. The label CURRENT or HISTORY will follow the code. Each code will be displayed for about five seconds. Modules that have no codes will give a message NO XXX CODES, where XXX is a three-letter acronym for that module.

When all the car's modules have been interrogated, you will get the message PCM? At that point, you can either press <Off> to go through the codes again to check or get ones you missed, or exit the diagnostic mode by pressing INFO RESET or pressing in the Temp knob (AUTO) or turning off the key.

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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  • 2 weeks later...

I have these history codes here goes:History codes PCM 1258, TCS Codes: C1221,C1232,C1291. RSS Codes:C1738,PZM Codes:B2550 Thanks agan for your help

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PCM

P1258 Engine Coolant Overtemperature - above 268°F - Protection Mode Active

TCS

C1221 Left Front Wheel Speed Sensor Input Signal is 0

C1232 Left Front Wheel Speed Circuit Open or Shorted

C1291 Open Brake Lamp Switch Contacts During Deceleration

RSS

C1738 Exhaust Solenoid Valve Short to GND

PZM

B2550 Storage Mode Entered (Backup Lamps Control Circuit)

The first code, P1258, tells us that your engine has lost coolant and overheated badly, and went into the limp-home mode to protect itself. Whenever this happens you must change the oil, particularly if it's dino oil and not synthetic oil. This is probably because of your radiator leak.

The TCS codes tell us that the left front wheel speed sensor is unplugged or shorted.

The C1291 tells us that one of the brake lamp switches is bad or unplugged, or that you stopped the car using the emergency brake. You can probably also set this code by towing from the rear while the key is on.

The C1738 tells us that you have a short in the wiring to the ride height exhaust solenoid, or that the solenoid itself is shorted.

The B2550 tells us that someone put your car in the Storage Mode, which conserves the battery when the car isn't going to be started for two weeks or more. I couldn't find the procedure in the FSM but it's in the owner's manual.

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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Just a reminder. Any time your engine overheats, replace the motor oil because it was affected by higher than normal temperatures.

The saddest thing in life is wasted talent

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Just a reminder. Amy time your engine overheats, replace the motor oil because it was affected by higher than normal temperatures.

Also depending upon how bad it overheats consider replacing the thermostat

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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jim thank you so very much for your expertise My son was driving the car when he said it read stop and turn engine is which he did Coluld their have been any damage done? I changed pout the surge tank it was cracked at the nipple and a small crack in the bottom. I will change the oil tomorrow thank you again. I will have sensors looked at also thanks I will keep an eye on the radiotor now for leaks.

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jim thank you so very much for your expertise My son was driving the car when he said it read stop and turn engine is which he did Coluld their have been any damage done? I changed pout the surge tank it was cracked at the nipple and a small crack in the bottom. I will change the oil tomorrow thank you again. I will have sensors looked at also thanks I will keep an eye on the radiotor now for leaks.

If your son turned the engine off right away, you should be fine.

As for radiators, the side tanks are plastic and they develop cracks. Usually it is the inlet tank on the driver side. Take a flashlight and carefully examine the upper part of the side tank, the surface which faces the grille. There are horizontal ribs, look for (but not look forward to) vertical cracks on the upper three-four ribs. Check when the radiator is hot.

The saddest thing in life is wasted talent

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thanks for all the help guys and especially to Jim with the same 97 el dogg and the other helpful points from the other members that gave me advice on the changing oil and the thermostat. thankls agian from the heart Go Caddy GO.

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  • 2 weeks later...

Hey gents me again, I fix the coolant problem. It was the surge tank and I replaced the thermostat. I am good in that area thanks a million. I have a another problem the ABS and Traction Light comes on after it reads Stability Reduced. I have codes here that I have pulled along with some new ones.I was wondering could it be the control arms in the rear or trailing arm. It's boucing something terriable and when you hit a rough spot it fishtails thanks Guys Here goes with the codes:PCM CODES:P0603,P1258,P1574,P1599.TCS CODES;C1221,C1225,C1232,C1256,C1291,C1293.PZM 2550 ALL HISTORY thanks

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PCM

P0603 Control Module Long Term Memory Reset

P1258 Engine Coolant Overtemperature - above 268°F - Protection Mode Active

P1574 Stoplamp Switch Circuit

P1599 Engine Stall or Near Stall Detected

TCS

C1221 Left Front Wheel Speed Sensor Input Signal is 0

C1225 Left Front Excessive Wheel Speed Variation

C1232 Left Front Wheel Speed Circuit Open or Shorted

C1256 EBCM Internal Malfunction

C1291 Open Brake Lamp Switch Contacts During Deceleration

C1293 Code C1291 Set in Previous Ignition Cycle

PZM

B2550 Storage Mode Entered (Backup Lamps Control Circuit)

Execept for a problem with the wheel speed sensor on the left front, I think that nearly all these are old codes from the overheating problem. Clear all the codes and see what comes back.

You may have a brake switch problem. There are two brake switches, mounted one on top of the other, above the brake pedal near the firewall. Make sure that they are both plugged in.

CTS-V_LateralGs_6-2018_tiny.jpg
-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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