Dapu error 27: Throttle signal above normal range
The Dapu controller has measured the throttle input voltage sitting higher than the calibrated working range, so it treats the signal as invalid. Motor assistance is cut, the speed reading drops to zero and walk assist stops working until the fault clears. Pedalling without power is still possible. The display will keep showing 27 until the throttle circuit is brought back inside spec.
| Drive system | Dapu controller (used by Pedego, Batavus, Koga and other European brands) |
| Severity | Fix at home |
| Keep riding? | Ride with caution |
| Typical cost | A replacement Dapu throttle with cable typically costs €25-€60 as a part; throttle plus controller replacement at a dealer runs €120-€260 fitted, depending on brand and labour rate. |
Likely causes
- Stuck, bent or damaged throttle hall sensor inside the grip
- Frayed, pinched or shorted throttle cable along the bar or frame
- Water or moisture ingress inside the throttle housing
- Corroded or loose connector between throttle and controller
- Internal controller input stage failure reading the throttle line incorrectly
How to fix Dapu error 27
- Switch the bike off and remove the battery before any inspection.
- Look at the throttle grip for sticking, cracks or moisture and squeeze it a few times with the system off.
- Trace the throttle cable from grip to controller, checking for pinch points, chafing against the headtube or kinks at the bar.
- Unplug the throttle connector, inspect the pins for green corrosion or bent contacts, then refit firmly.
- Refit the battery, switch on and test at standstill; clear the code by cycling power if it has cleared.
- If 27 returns, replace the throttle assembly with a matching Dapu unit and retest.
- If the code still appears with a new throttle, the controller itself must be replaced by a dealer — that is the hand-off point.
Warranty: A genuine throttle or controller component failure inside the first two years is normally covered under warranty, but crash damage, water ingress and worn grips are treated as owner damage and excluded.
Typical cost: A replacement Dapu throttle with cable typically costs €25-€60 as a part; throttle plus controller replacement at a dealer runs €120-€260 fitted, depending on brand and labour rate.
Frequently asked
Can I reset dapu error 27?
Switching the system off and back on clears the display, but if the throttle voltage is still above range the code comes back the moment you twist the grip. A real reset only happens once the faulty throttle, cable or controller is replaced.
Is it safe to keep riding with error 27?
The controller cuts motor assist to protect itself, so the bike still pedals normally under your own power, just without throttle or walk mode. Riding home without assist is acceptable, but avoid routes that depend on motor help.
How much will fixing error 27 cost?
A throttle part alone runs €25-€60, and a dealer throttle-plus-controller replacement typically lands €120-€260 fitted. Warranty within two years usually covers a genuine component fault, not crash or water damage.
Related Dapu codes
Official source: Dapu controller error chart, Pedego dealer service guide
Not an official Dapu document. Compiled from workshop experience and public service information; details can differ per system version and bike brand.