Chassis, generic

C0662 Left Rear Wheel Speed Sensor B Circuit High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

C0662 is stored when the second left rear speed channel reads above anything the sensor itself can deliver. NXP's KMI25 uses three current steps: about 7 mA at rest, 14 mA for a logic one of its data protocol and 28 mA for each speed pulse. A higher value can only come from outside the sensor, such as contact with battery voltage, a chafed wire touching another feed or moisture bridging the plug. Motor magazine measured 10 to 11 V on the supply wire of Honda sensors; a signal lead that has worn through against that wire will climb towards the same voltage. No carmaker documents C0662 publicly. It also appears in GM's keyword list PIP5094, but only as a former GM code with an unrelated meaning.

Likely causes

Signal lead shorted to battery voltage or to the sensor feed
Moisture or corrosion bridging pins in the connector
Sensor B drawing excessive current internally

Symptoms

  • Warning lamp for ABS or stability control
  • Module switches channel B off, redundant functions unavailable

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–450
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

lr wss bsensor wiring

Related codes

C065FC0661C050FC0669

References: nxp.com, motor.com, static.nhtsa.gov.