C0598 code meaning
Brake System Control Module B Performance
What C0598 means
C0598 is the same summary check for a second brake control module, B. Such a module is found where braking is split between two units: Bosch gives its integrated power brake a separate backup unit for automated driving, so the vehicle still stops if the main unit fails. A BWI patent describes such a backup unit with its own control unit, motor and pumps for the front axle, linked to the main unit over a private CAN line and taking over pedal boost in the fallback mode. C0598 reports that unit B fails its internal checks. No manufacturer documents C0598 publicly; Toyota's use of C0597 for control module A shows the lettering. Redundancy or assist is reduced while it is stored.
C0598 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C0598
- Brake system warning message
- Driver assistance or automated driving functions unavailable
- Reduced brake assist if the module handles boosting
Common causes of C0598
- PossibleSoftware or calibration fault in brake module B
- PossiblePower supply or ground problem of module B
- PossibleInternal hardware fault of module B
- Less likelyFault on the link between the two brake modules
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Bscm bBrake system control module
What each part of C0598 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 98 | The exact fault in that area. |
What to do next
- Note C0598 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 C0598
What does C0598 mean?
C0598 means "Brake System Control Module B Performance". C0598 is the same summary check for a second brake control module, B. It is a generic code, so it means the same on every make.
Is it safe to drive with C0598?
Drive gently and only to a workshop. With C0598 the car can go into limp mode (reduced power) to protect itself.
Will C0598 fail an emissions test?
C0598 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 C0598 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will C0598 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.