C0064 code meaning
Roll Rate Sensor
What C0064 means
C0064 covers the roll rate sensor, a gyroscope that measures rotation about the vehicle's longitudinal axis. NHTSA's brake safety study names roll rate among the vehicle dynamics inputs of the ABS/ESC module, and roll stability control uses it, mainly on tall vehicles, to spot the onset of a rollover and counter it with braking and torque reduction. The module checks the roll signal against lateral acceleration and the other inertial channels and sets C0064 when it is out of range, stuck, noisy or implausible. In current six-axis inertial units such as Bosch's IMU the roll gyro shares one housing with pitch and yaw gyros and three accelerometers. Roll stability control switches off and the ESC lamp lights; base braking remains. No manufacturer documents this code publicly.
C0064 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.6 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C0064
- Roll stability control disabled
- ABS/ESC warning lamp on
- Rollover mitigation unavailable
Common causes of C0064
- Most likelyRoll rate gyro failed or out of range
- PossibleLoose or shifted sensor cluster mounting
- Less likelyHarness or connector fault
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Inertial sensor cluster
What each part of C0064 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 64 | The exact fault in that area. |
What to do next
- Note C0064 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about C0064
What does C0064 mean?
C0064 means "Roll Rate Sensor". C0064 covers the roll rate sensor, a gyroscope that measures rotation about the vehicle's longitudinal axis. It is a generic code, so it means the same on every make.
Is it safe to drive with C0064?
Drive gently and only to a workshop. With C0064 the car can go into limp mode (reduced power) to protect itself.
Will C0064 fail an emissions test?
C0064 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is C0064 to fix?
Difficulty: medium. A typical repair takes 0.6 to 3 hours of work. This is a job for a workshop.
Will C0064 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.