This is a known failure on Renault Megane II/III and Scenic models equipped with Siemens or Sagem ECUs.
Malfunctions in other systems like power steering, lights, or dashboard displays due to unstable power. Primary Causes dtc p0560 renault
: The engine may struggle to start, stall at idle, or even go into "Limp Mode" where transmission shifts are restricted. This is a known failure on Renault Megane
when the engine is running. Readings outside these ranges (like the 17–19V reported in some Renault-related forum cases stall at idle
Using a multimeter, measure the battery voltage with the engine .
: Many independent garages misdiagnose P0560 as alternator when it’s just a bad battery. Always start with a known good battery before replacing expensive parts.