Peugeot 406 Overheating or is it?

scapa69 · Post by **scapa69** » 10 Dec 2004, 20:45

Bought a ex-fleet 406 hdi 2.0 W REG estate recently at auction. Drove fine for a couple of weeks but occasionaly the red STOP light flashes and beeps on the dash and the digital display shows ENGINE TOO HOT OR OVERHEATING (cant remember exact words). At the same time my temperature guage that was showing an average temperature of 90c drops to 0c. 5 to 10 mins later the fault stops beeping and flashing and Temperature guage kicks in back up to 90c. All through this the fan is going on and off normaly which suggests to me its not overheating its just an electrical fault.
anyone got any ideas ?[:)]

PowerLee · Post by **PowerLee** » 10 Dec 2004, 22:49

The early non multiplexed cars had 3 temperature sensors.
One for the STOP & high temperature warning light, Another one for the ECU & Bitron unit & a third for the temp gauge.
Your HDI is multiplexed im afraid, It could be a just duff sensor, electrical connection or it might want a software upgrade.
HDI lumps & multiplexed Peugeots arnt my strong point im afraid.

wheeler · Post by **wheeler** » 10 Dec 2004, 23:38

chances are its a faulty green temp sensor on the thermostat housing,they aint that expensive & very easy to change.