C064E code meaning
Brake Pressure Sensor N Circuit High
What C064E means
The signal of sensor N is above its permitted maximum. What the brake does next is described well for truck EBS: WABCO checks every analog pressure sensor signal against its authorised values; if one is lost, the module may keep producing electrical brake pressure by auxiliary means with limited accuracy, and if electronic control is impossible the axle falls back on purely pneumatic backup braking. For digital sensors the equivalent of a high reading is often a value pinned at full scale or a fault flag; Pico Technology notes that SENT frames carry a status nibble with diagnostic information and a CRC the receiver checks. C064E has no documented user, and nobody publishes which sensor N would be. Likely: short to supply, lost ground, failed sensor.
C064E at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C064E
- Brake or ESC warning lamp on
- Less precise brake pressure control or pure backup braking
Common causes of C064E
- Most likelySignal shorted to sensor supply or battery voltage
- PossibleOpen sensor ground
- Less likelySensor electronics reporting full scale or an internal fault
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Brake pressure sensor nSensor wiring
What each part of C064E means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 4E | The exact fault in that area. |
What to do next
- Note C064E 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 C064E
What does C064E mean?
C064E means "Brake Pressure Sensor N Circuit High". The signal of sensor N is above its permitted maximum. It is a generic code, so it means the same on every make.
Is it safe to drive with C064E?
Drive gently and only to a workshop. With C064E the car can go into limp mode (reduced power) to protect itself.
Will C064E fail an emissions test?
C064E 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 C064E to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will C064E clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.