The throttle has not returned to its correct position

Stop riding Last verified: pending review Reviewed by: editorial team

Quick answer

Error Code 04 signifies that the throttle is not returning to its default position. This can prevent the motor from functioning properly, as the throttle is essential for sending signals to the controller. The system continuously monitors the throttle after being powered on, and any abnormality can trigger this error.

Stop riding Other Often DIY-friendly Beginner (15–30 min)

Does this apply to your bike?

H700 · Bafang · Common displays: DP E171

Heads-up: the same number can mean different things on other systems — always check your drive system first. Browse all drive systems →

What you’ll notice

The display shows error code 04, the throttle may feel stuck, and the motor does not respond to throttle input.

Likely causes, ranked

Start at #1 — causes are ordered by how often they turn out to be the problem.

#1 Throttle is stuck

How to check: Inspect the throttle on the handlebar to see if it moves freely.

#2 Faulty controller

How to check: If the throttle is not stuck, check the controller connections and functionality.

Troubleshooting steps

Check Throttle Position

easy

Inspect the throttle to ensure it returns to its resting position.

If it passes →Clear Error Code 04

If it fails →Replace the throttle
Clear Error Code 04

easy

Reconnect all components and turn on the system to check if the error persists.

If it passes →Repair complete

If it fails →Repeat throttle check or consult a professional

When to stop and get professional help

If the error persists after checking the throttle and controller, consult a professional.

Never open, puncture, or disassemble the battery pack, and never bypass the BMS. See our safety guide.

More codes for H700

07 · Over voltage protection 08 · Error with the hall sensor 09 · Fault with motor phase winding

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Sources & verification

Last verified: pending review Reviewed by: editorial team

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