I was on my way home yesterday nad as I hit a bumpy bit in the road I got the "Service ABS," Service Active Handling," "Service Traction Control" messages on my dash. I'm pretty sure I know what this is caused by cause it has happened before but never just crusing down the street. I got home and checked out the codes and I had the following:
TCS 28 C1226 H - LF Excessive Wheel Speed Variation
BCM 40 B2583 H - LF Turn Signal Monitor Circuit (Short to Voltage)
PCM U1160 H - Loss of Communications with LDCM

I've had these codes before and based on the first two I feel that a connection must be loose on the left front somewhere which controls these codes.

BUT the one code I did NOT expct to find was this one:
P1111 H - Intake Air temperature (IAT) Sensor Circuit Intermittent High Voltage -C

As far as I know I've never had this code get thrown before. Is this something I should be concerned with? Shoud I just check my intake connections and make sure they are snug. I have the Vortex intake but it has been on the car for 16 months and this si the first code like this. I don't know how long it has been in history and I would not have even check the codes if it had not been for the TCS, BAS, and AH messages that I received.

Any prior experiences of insight would be helpful. Thanks!

 

TTT

 

I'd definitly check out the connection to the IAT.

As for the other three, I wonder if they share a common ground point or if it's just a coincidence.

 

Hi there,
No, these are no coincidence. The 1226 is usually due to the wheel speed sensors harness, which flexes, and shows an internmittant signal to the EBCM.
Now, when this occurs, your 3 warning that you had will show.
Once the sensor harness is replace, you should be fine.
As for the others, I would not concern yourself with the communications code just yet, unless you are getting an intermittant non functioning window, or lock.
The IAT is most likely the connector, as the stretching puts tension on the terminals, causing this code.
This would have to be replaced also.
Let us know how you do, c4c5

 

Thanks for the reply c4c5. I do have one other question though. Are the sensor harnesses themselves faulty from the plant or is it just a matter of time before new ones would also be subjected to the same tensions and flexes and thus cause the same codes to start showing up again down the road. Just curious if this has the potential to be a reoccuring problem even after having the harnesses replaced.