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2007 CTS Sport 3.6
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256 Posts
Discussion Starter #1 (Edited)
So every once in a while when I'm driving around only in the snow, the ABS and stability control systems will turn off. If I scan for the codes, I get a rough road sensor, has anyone had this happen? :confused:
 

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'11 CTS-V Coupe M6, '05 1SG STS4 V8
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377 Posts
What is the code number?

Sounds like you have the F55 suspension is that right?
 

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08 STS-4 N* 1SG, 08 DTS Luxury II, 04 Bonneville GXP N*
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Never heard of such a thing on the STS personally. With magnetic ride control (if equipped), the Electronic Suspension Control module monitors the road surface through multiple sensors and adjusts the suspension accordingly. As already asked, what was the exact code you pulled?
 

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2007 CTS Sport 3.6
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256 Posts
Discussion Starter #4
If I remember correctly I have the FE1 suspension, without ride height control. I cleared everything with my scanner, but forgot to write down the code, I'm pretty sure it'll happen again the next time we get some snow.
 

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2006 STS V8 1SF RWD
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6,479 Posts
All STS's have rear level control via an air compressor and small bladders in the rear shocks. As far as suspension you either have active or passive. F55 being the RPO code for the active system. Flip up your spare tire cover and take a peak at the identification sticker underneath, if you don't see F55 it's the passive system.
 

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08 STS-4 N* 1SG, 08 DTS Luxury II, 04 Bonneville GXP N*
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I'm pretty sure that not all STS's have the auto level control. I used to think this as well but discovered this is not the case. This was discussed in a thread some time back. ALC is managed by the Electronic Suspension Control module so without F55 there is no ALC.
 

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2007 CTS Sport 3.6
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256 Posts
Discussion Starter #7
Well I checked the SPID and there's no F55, so I guess I have passive? So back to my question, is there a sensor that could be malfunctioning?
 

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08 STS-4 N* 1SG, 08 DTS Luxury II, 04 Bonneville GXP N*
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Still need the exact code. I've never heard of a rough road sensor in these.
 

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2018 Camaro 2SS/NPP/F55/AQJ, Sold: 2015 Camaro, 2006 STS (EXP) 1997 Seville STS (EXP)
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447 Posts
...yes...STS's without F55 use a "Nivomat" system/shocks in the rear....there is no air compressor....nivomats are "self-leveling"...it's a passive system...
 

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05 STS4
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4,241 Posts
ddalder said:
Still need the exact code. I've never heard of a rough road sensor in these.
Guy wants help. Complains of an issue. Doesn't bother to give us the code.

Gonna have to go Jerry Maguire here...
"Help me help you help me help you..."

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SuperDaveSTS said:
So every once in a while when I'm driving around especially in the snow, the ABS and stability control systems will turn off. If I scan for the codes, I get a rough road sensor, has anyone had this happen? :confused:
Quite simple. There's a little button by the shifter says TC. Stop pressing and holding it down in the snow. Problem solved

Sorry had to take that shot.
 

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2007 CTS Sport 3.6
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256 Posts
Discussion Starter #12
Guy wants help. Complains of an issue. Doesn't bother to give us the code.

Gonna have to go Jerry Maguire here...
"Help me help you help me help you..."

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LOL your're just an as$ to everyone who posts on this forum aren't you? If you actually read my original post I said "only when it snows out" So...when it snows again and the issue reappears I'll be sure to get that code, so in the mean time go troll someone else's post.
 

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2001 Seville STS, 1990 Seville (RIP), 1972 Sedan Deville
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26,323 Posts
Unless you cleared the codes, it's still in history and can be pulled at any time. No warning lights/messages have to be on to pull history codes.
 

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2007 CTS Sport 3.6
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256 Posts
Discussion Starter #15
I cleared them, its happened maybe 2 or 3 times so I'm not to worried about it, and like I said it only does it when it snows out. So I'm not to worried about it since I don't think we'll get much more anytime soon.
 

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05 STS4
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SuperDaveSTS said:
Only an ass to those members who expect us to solve the problem with only part of the equation.


Take your car to Cadillac and see how fast they give it back when you say I have a problem with such and such but I cleared the codes and didn't take the time to write them down...

I've personally seen service writers hand the keys back and say bring it back when the code is present.

Don't know what your doing don't mess with it.

Oh and btw this "ass" knows the code. Try P0318. But I'll go "troll" somewhere else isn't that right Mr IKE.

Goodluck!
 

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08 STS-4 N* 1SG, 08 DTS Luxury II, 04 Bonneville GXP N*
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I've found a P0318 associated with the CTS. Perhaps this also applies to a pre-2008 STS but this code doesn't seem to apply to 2008 for sure.
 

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05 STS4
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It's a valid code for the LY7 3.6 ONLY (equipped in the 05-07 STS before they switched to the DI LLT) which is why it's also valid for the gen 1 CTS too.
It it not a valid code for the 4.6.


DTC P0318

Circuit Description

Correct engine misfire detection is dependent on whether or not the vehicle is experiencing a rough road condition. A rough road condition causes unexpected crankshaft fluctuations. In order to detect a rough road condition, the electronic brake control module (EBCM) communicates a wheel speed signal over the serial data circuit to the engine control module (ECM). The wheel speed sensor information allows the ECM to distinguish if the crankshaft speed variations are caused by a rough road condition or are caused by a true misfire. If the ECM does not receive the rough road information, this DTC sets.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0318 Rough Road Sensor Circuit

Conditions for Running the DTC
•There are no EBCM wheel speed sensor DTCs.
•The EBCM is communicating over the serial data circuit for more than 5 seconds.
•DTC P0318 runs continuously once the above conditions are met.

Conditions for Setting the DTC

The ECM does not detect a wheel speed signal from the EBCM for more than 4 seconds.

Action Taken When the DTC Sets
•The control module stores the DTC information into memory when the diagnostic runs and fails.
•The malfunction indicator lamp (MIL) will not illuminate.
•The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Failure Records.
•The driver information center, if equipped, may display a message.

Conditions for Clearing the DTC
•A current DTC Last Test Failed clears when the diagnostic runs and passes.
•A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic.
•Clear the DTC with a scan tool.



Step


Action


Yes


No


1

Did you perform the Diagnostic System Check - Vehicle?

Go to Diagnostic Starting Point - Antilock Brake System
in Antilock Brake System
Go to Diagnostic System Check - Vehicle in Vehicle DTC Information


Basically if its a constant problem the "service writer"(that's what the OP claims to be) who should know better than to do things half ass, needs to look into the EBCM (EBTCM) module replacement. On the 05 4.6 I know for a fact the electronic component is available separate from the hydraulic portion.
 

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2007 CTS Sport 3.6
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256 Posts
Discussion Starter #19
So like I said you like to bee an ass to everyone on here, this whole time you knew what I was referring to and yet you still felt the need to be a dick with your smart ass comments. I asked a question CORRECTION made an observation and posted it on here to see if anyone had the same experience, if I was actually worried about it I would have looked up the codes, but since my scanner gave the description I felt that unnecessary. So your answer of "take it to Cadillac" to everyone on here is pretty outdated. Thank you for wasting everyone's time and being a complete douche when unnecessary, good day.
 

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05 STS4
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4,241 Posts
SuperDaveSTS said:
So like I said you like to bee an ass to everyone on here, this whole time you knew what I was referring to and yet you still felt the need to be a dick with your smart ass comments. I asked a question CORRECTION made an observation and posted it on here to see if anyone had the same experience, if I was actually worried about it I would have looked up the codes, but since my scanner gave the description I felt that unnecessary. So your answer of "take it to Cadillac" to everyone on here is pretty outdated. Thank you for wasting everyone's time and being a complete douche when unnecessary, good day.
Well since you couldn't take the humor in my 1st comment why of course I'm going to lay into you.

So allow me to put it this way...

I'd rather be an informed ass than an ignorant moron.

I also don't recall telling you DIRECTLY to take the car to Cadillac. I inferred if you HAD after messing with it yourself how quickly they'd return your keys with the common "Customer Complaint Not Verified", but that would be a waste especially in your case because you did such a great job diagnosing the problem youself didn't you?

Tell me Mr. service writer. Do you enjoy when someone tinkers with a problem can't figure it out and expects you to pick up the peices when they have only made the puzzle far more complicated? Personally I love it. It means I just means I met my labor quota.
 
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