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You clip in, roll away, glance at your head unit—and something’s wrong. Cadence is there, speed looks fine, but one side of your power data is missing. Whether it’s the left or the right, seeing zero watts from a single Favero Assioma pedal is enough to derail a training session.
The reassuring truth is that this problem is almost never a dead pedal. In most cases it’s a communication, charging, or setup issue that you can fix quickly. Below is a clear, step-by-step explanation—without the fluff—so you can restore accurate power and get back to training.
First, Confirm What’s Actually Missing
Before assuming failure, check what your head unit shows. If cadence appears but power does not, or if total power shows with no left/right balance, the pedal is usually awake but not communicating correctly. Assioma pedals measure independently, so when one side drops out it points to sync or configuration—not broken strain gauges.
The Most Common Cause: Low Battery on One Pedal
This catches even experienced riders. A pedal can wake up and transmit cadence while its battery voltage is too low to send power data.
Fix: Fully charge both pedals together using the magnetic cable until the LED indicates a full charge. Uneven battery levels between left and right can create sync problems, so always charge them as a pair. After charging, spin the cranks to wake the pedals and recheck data.
Pairing Issues After Device or Bike Changes
If you’ve switched head units, updated firmware, or moved the pedals between bikes, pairing is often the culprit. Each pedal broadcasts its own ID; pairing only one side means the other won’t report power.
Fix: Remove all existing Assioma sensors from your head unit, wake both pedals by spinning the cranks, then pair each pedal individually. Confirm that two sensors appear in your device list before starting a ride.
Tired of Power Dropouts During Training?
Assioma pedals are known for stable dual-sided power, easy pairing, and long-term accuracy—especially when set up correctly.
View Favero Assioma Power Meter Pedals
Outdated or Mismatched Firmware
Firmware mismatches can silently stop one pedal from sending power. This is common if one pedal updated and the other didn’t.
Fix: Open the Favero app, connect to each pedal, and update firmware on both sides. Once updated, wake the pedals again. Firmware updates frequently resolve one-sided dropouts and improve ANT+/Bluetooth stability.
Calibration That Didn’t Stick
A failed zero-offset can leave you with cadence but no watts from one side.
Fix: Warm up for a few minutes, then perform a manual calibration with the bike upright and unclipped. If calibration fails on one pedal, repeat after charging and firmware checks.
Installation and Torque Still Matter
Under-tightened pedals or incorrect installation can prevent accurate force measurement.
Fix: Double-check that left and right pedals are on the correct crank arms and tightened to Favero’s recommended torque. Avoid extra washers unless specified—incorrect spacing can interfere with readings.
When It Might Actually Be Hardware
True hardware issues are rare, but they can happen after a heavy crash or if water ingress occurs due to damaged seals. If a pedal won’t charge at all or never appears in the app despite all steps above, Favero support is known for quick diagnostics and repair options.
How to Prevent One-Sided Dropouts Going Forward
Consistency keeps Assioma systems rock-solid. Charge pedals regularly (not only when empty), update firmware together, recalibrate after bike changes, and always confirm both pedals are paired before riding. These habits eliminate most issues before they start.
Thinking About an Upgrade?
If one-sided data problems keep interrupting your training—especially on older setups—it may be time to move to a newer or dual-sided configuration for more robust left/right tracking.
Train With Reliable, Dual-Sided Power You Can Trust
Assioma pedals are known for accuracy, easy calibration, and dependable communication—ride after ride.
View Favero Assioma Power Meter Pedals
Conclusion
When a left or right Assioma pedal stops reading power, it’s usually a quick fix—not a failure. Charging both pedals, correcting pairing, updating firmware, and recalibrating resolve the vast majority of cases. Fix it once, follow a few best practices, and your Assioma setup will deliver reliable data well into 2026 and beyond.
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