c0223 code 2002 sierra

Wild Bill

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MAKE:Chevy
MODEL:Sierra 1500 4wd
YEAR
:2002
MILES:165000
ENGINE
:5.3
DESCRIBE ISSUE....On brake activation below 20 mph abs activates w/code c0265, resoldered connections in electronic brake control relay, now have C0223 code rt frt wheel speed sensor drops off at 30kph, reads accurately above that. Any ideas?
 

kev2

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SENSORS ARE A KNOWN ISSUE - ALWAYS REPLACING THEM ALSO
Recall #05068 Front Wheel Speed Sensor Corrosion
FOR THE P0265 DID YOU SEE
TSB #04-05-25-002D


Measure AC voltage and clean the wheel speed sensor mounting surfaces.

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in the General Information sub-section of the Service Manual.
  2. Disconnect both the front wheel speed sensor connectors at the frame and harness.
  3. Place a Digital Volt Meter (DVM) across the terminals of each wheel speed sensor connector.
  4. Rotate the wheel clockwise approximately one revolution per second. The minimum reading should be at least 350 ACmV's. If the reading is less than 350 ACmV's, remove the wheel speed sensor. Refer to the applicable Wheel Speed Sensor Replacement procedure in the ABS sub-section of the Service Manual.
  5. Plug the wheel speed sensor bore in order to prevent debris from falling into the hub during service.
  6. Clean the wheel speed sensor mounting surface using a wire brush, sand paper, emery cloth, scotch brite, or other suitable material. Be sure to thoroughly clean the wheel speed sensor surface. There should be no rust or corrosion.
  7. Check the sensor head to determine if it has been warped/distorted due to the corrosion build up or other causes. Check the mounting surface on the sensor head for flatness by placing it on the edge of a metal machinists scale or other suitable straight edge to measure the flatness. Check the sensor for flatness in multiple (minimum 3) positions/directions. If the sensor head is distorted, replace the sensor.
  8. Apply (spray) two thin coats of the specified rust penetrating lubricant (corrosion inhibitor) to the complete sensor mounting surface on the bearing hub. Allow to dry for 3-5 minutes between coats. Use ONLY Rust Penetrating Lubricant, P/N 89022217 (Canadian P/N 89022218).
  9. When the corrosion inhibitor is dry to the touch (about 10 minutes), apply a thin layer of bearing grease to the hub surface and sensor O-ring prior to sensor installation. Use ONLY Wheel Bearing Lubricant, P/N 01051344 (Canadian P/N 993037).
  10. Install either the original sensor or a new one in the hub. Ensure that the sensor is seated flush against the hub. Refer to the applicable Wheel Speed Sensor Replacement procedure in the ABS sub-section of the Service Manual.
  11. Place the DVM across the sensor terminals and recheck the voltage while rotating the wheel. The voltage should now read at least 350 ACmV's.

 
Last edited:

nickb2

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Please fill out the following to ask a question.

MAKE:Chevy
MODEL:Sierra 1500 4wd
YEAR
:2002
MILES:165000
ENGINE
:5.3
DESCRIBE ISSUE....On brake activation below 20 mph abs activates w/code c0265, resoldered connections in electronic brake control relay, now have C0223 code rt frt wheel speed sensor drops off at 30kph, reads accurately above that. Any ideas?
Remove wheel speed sensor. Check ohms. Buy a new one, you will need it.

Kev2 gave very accurate info, but from experience, most likely a wheel hub/sensor is needed. Make sure on your laptop or ocsiloscope you have a proper ac wave.
 

Wild Bill

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Messages
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Swapped left and right sensors, right side still would not read until 30 kph. What bugs me is that all 3 sensors read 6 kph when stopped in park. Shouldn't the reading be 0 kph?
 

kev2

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alternator- check diodes -
OR disconnect from system and see if still 6kph in park
explain later GTG
 

nickb2

Wrench. Diagnostic Tech.
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Messages
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Location
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alternator- check diodes -
OR disconnect from system and see if still 6kph in park
explain later GTG
I think what Kev is trying to say, ripple may be sending ac through system in park ENGINE ON. Probably a bad ground or rectifier bridge/diodes. Correct me if I am wrong Kev, on what you meant. Do not want to steer the OP in the wrong direction.

Here is a snapshot of code test procedure. ECBM just wants all sensors at same speed to apply or disengage. Below 13km or 8m/hr don't see the use to be alarmed, the system/code only sets above 13/8. As long as all 4 work in synchronize.Screenshot (7).png
 
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