DTC U2005:86 [Instrument Cluster]: Notes

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION AND POSSIBLE CAUSE

DESCRIPTION	Signal error from PCM
DETECTION CONDITION	Instrument cluster detects invalid vehicle speed from PCM under the following conditions: Passed 20 s after switch the ignition to ON Odometer is normal and more than 30 km/h {19 mph} Battery voltage is more than 10 V Received invalid data from PCM for 1 s
POSSIBLE CAUSE	PCM malfunction Instrument cluster malfunction