Chassis, generic

C065B Right Front Wheel Speed Sensor B Circuit High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

In C065B the line of sensor B at the right front shows a level above its allowed window, which mostly means a short to the supply. TI's TPIC7218-Q1 sets this limit by sensor type: for active two-level sensors any current over 20 mA counts as overcurrent, for three-level VDA sensors only above 40 mA, in both cases marked as a possible short to battery. A separate flag reports a short to battery while the channel is switched off, and the supply switch caps current at 50 to 150 mA when the line is shorted to ground. Infineon's TLE5046SiC explains the wide band: its speed pulse alone may draw up to about 32 mA. Inspect the harness near hot or moving parts and for contact with another channel, then test the sensor. No carmaker documents C065B.

Likely causes

Signal line shorted to battery voltage
Contact with the supply of another sensor channel in a shared cable
Sensor draws excessive current due to internal damage

Symptoms

  • Warning for brake or driver assistance system
  • Channel switched off by the module, redundant functions unavailable

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–500
Time0.5–2 h

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

Parts involved

rf wss bsensor wiring

Related codes

C0658C065AC0509C0654

References: ti.com, infineon.com.