left front wheel-erratic sensor readings help please - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 09-29-2011, 10:47 AM   #11
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I would have the car re-scanned for body codes. There are a number of sensors that can light up the abs/trac light and you can end up throwing a lot of time and money in the wrong direction. I changed my front wheel bearings only to find that did not fix the problem. Had the car scanned and found it was the EBCM (electronic brake control module). Bought a used one from Morad, installed it, and have not had a problem since. I'm not suggesting your problem is the EBCM, just that a scan is the most effective means of getting you to a solution.
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Old 09-29-2011, 11:17 AM   #12
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here are all the codes... Name:  codes.jpg
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the brake switch code is whatever part stops you shifting with your foot off the brake is broken. it has been forever. the brake lights work fine..
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Old 09-29-2011, 04:23 PM   #13
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DTC C1221 LF Wheel Speed Sensor Input Signal is 0
DTC C1225 LF Excessive Wheel Speed Variation
DTC C1232 LF Wheel Speed Circuit Open or Shorted
DTC C1291 Open Brake Lamp Switch Contacts During Deceleration
DTC C1293 DTC C1291/C1292 Set in Current or Previous Ignition Cycle


Sounds like either the front left sensor needs to be replaced, or the wire going to the sensor has a break in it.
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Old 10-02-2011, 04:49 PM   #14
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Quote:
Originally Posted by 2kg4u View Post
DTC C1221 LF Wheel Speed Sensor Input Signal is 0
DTC C1225 LF Excessive Wheel Speed Variation
DTC C1232 LF Wheel Speed Circuit Open or Shorted
DTC C1291 Open Brake Lamp Switch Contacts During Deceleration
DTC C1293 DTC C1291/C1292 Set in Current or Previous Ignition Cycle


Sounds like either the front left sensor needs to be replaced, or the wire going to the sensor has a break in it.
yea.. in theory i should know by the end off the week. both 5 month old bearings are gone. already
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