Bosch eBike Error Code Complete Reference 2026
Last updated July 30, 2026 · By Elena Park, E-Bike Writer
Bosch eBike Systems powers more mid-drive e-bikes in Europe and North America than any other manufacturer. The Cargo Line, Performance Line CX, and Active Line motors all share a common diagnostic system that reports errors through a numbered code on your Intuvia, Nyon, or Purion display. This reference covers every Bosch error code in our database with meanings, causes, and repair guidance.
Bosch Error Code Overview
Bosch error codes fall into two severity tiers: stop-ride codes that cut motor power immediately, and check-soon codes that reduce power but allow continued riding. Understanding which tier your error falls into tells you whether you can ride home or need to call for pickup.
Bosch codes use a two-tier numbering system. Low numbers (10-14) originate from sensors and communication between the drive unit and external components. High numbers (500-560) come from the drive unit internals and battery management system. The high-number codes tend to be more serious and more expensive to fix.
Speed Sensor Errors (Codes 10 and 550)
Speed sensor faults are the most common Bosch errors. Error 10 means the rear wheel speed signal is missing or erratic; Error 550 means the speed sensor magnet is misaligned or the sensor is dirty. Both prevent the motor from providing pedal assist because the system cannot verify wheel speed.
The fix is usually simple: check that the magnet on the rear wheel spoke is aligned with the sensor on the chainstay (gap should be 3-5mm), clean the sensor face, and secure the magnet with Loctite if it has slipped. If the error persists, the sensor cable may be pinched at the chainstay exit point.
These errors account for about 15-20% of all Bosch service calls and cost $5-50 to fix — usually just a magnet repositioning. The sensor itself rarely fails.
Motor and Controller Errors (Codes 11, 500, 510)
These are the serious codes. Error 11 indicates the motor is mechanically locked — the rotor cannot turn, often due to internal bearing failure or debris. Error 500 is an internal drive unit controller fault. Error 510 means the motor has overheated and exceeded its thermal limit.
None of these are DIY-repairable. The drive unit must be removed and sent to a Bosch authorized service center or replaced entirely. Error 500 often requires full drive unit replacement ($600-900). Error 510 may clear after cooling if it was caused by a steep climb in hot weather, but repeated occurrences indicate a thermal management fault.
Battery and BMS Errors (Codes 13, 503, 530, 560)
Battery errors make up roughly 25% of Bosch diagnostic issues. Error 13 and Error 503 both indicate communication failure between the BMS and drive unit — usually a corroded contact, not a dead battery. Error 530 reports inconsistent charge levels between cell groups. Error 560 detects overvoltage, typically from a faulty charger.
For a deeper dive into how Bosch BMS errors compare across the system, see our BMS complete guide. Most battery communication errors are fixable by cleaning and reseating the battery contacts — full battery replacement is the last resort, not the first.
Communication and Throttle Errors (Codes 12 and 14)
Error 12 is a CAN bus communication error between the drive unit and display or controller. Check the wiring harness for pinched or corroded connectors. Error 14 is a throttle fault — the throttle signal is out of range, often due to water ingress in the throttle assembly or a failing throttle potentiometer.
Both errors typically cost $30-150 to fix depending on whether a wiring repair or component replacement is needed. CAN bus errors that persist after connector inspection may indicate a failing drive unit board.
Frequently Asked Questions
What is the most common Bosch eBike error code?
Bosch Error 10 (speed sensor fault) is the most common, accounting for about 15% of Bosch service calls. It is usually caused by a misaligned or dirty wheel magnet and costs under $50 to fix.
Can I fix Bosch error codes myself?
Sensor and connector errors (10, 13, 550) are often DIY-repairable with basic tools. Motor controller faults (11, 500, 510) require Bosch diagnostic tools and dealer service. Attempting to open the drive unit yourself voids the warranty.
How much do Bosch eBike repairs cost?
Repair costs range from $5 for a magnet replacement to $900 for a full drive unit replacement. Most fixes fall between $50 and $300. Battery communication errors are the cheapest to fix; internal motor faults are the most expensive.
What does Bosch Error 500 mean?
Error 500 indicates an internal drive unit fault in the motor controller. The motor must be replaced or serviced by an authorized Bosch dealer. This is one of the most expensive Bosch errors, with repairs typically costing $600-900.