C065CRight Front Wheel Speed Sensor B Intermittent/Erratic
- Generic OBD-II code · Chassis
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- C065C describes a second right front speed signal that vanishes now and then or carries irregular pulses. With AK protocol sensors, Pico's oscilloscope guide shows that the sensor keeps sending a data packet roughly every 147 ms even while the wheel stands still, so a break in that rhythm exposes a loose contact without the car moving. Pico also notes that some data bits are assigned by the sensor or vehicle maker, and that filtering helps to separate noise from real pulses when measuring. Inside Infineon's TLE5046SiC one safety check fires when more than two consecutive pulses appear on the speed path without a matching event on the direction path, or the reverse, and an EMC feature rides through short supply interruptions. No carmaker documents C065C.
- What you may notice
- Warning that comes and goes, e.g. on rough roads or while steering
- Automated or redundant brake functions intermittently withdrawn
- Likely causes
- LikelyLoose contact in plug or cable, often where the cable flexes with steering
- PossibleEncoder ring with dirt, metal chips or cracks
- RareInterference from nearby high-current lines or damaged shielding
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.