P0494 on Peugeot and Citroën solved | Fan control unit
Blower resistor change.

COPYRIGHT WARNING:
All pictures and texts in this web page are the property of nomaallim.com. Any use of any part of those contents without the written consent of nomaallim.com shall be subject to legal procedures as per international and local laws in the concerned country. Using the name "nomaallim" or "nomaallim com" or "nomaallim.com" in the text describing the unauthorized copied content shall not constitute an exception and shall be sanctioned in accordance to the effective laws and proceedings.
  • OVERALL DIFFICULTY INDEX: 3/10
  • IF YOU HAVE NO TOOLS YOU SPEND $25 TO GET THEM FOR THIS JOB
  • IF YOU HAVE NO EXPERIENCE YOU SPEND 1.5 HOURS TO CARRY OUT THIS JOB
  • RISK OF BURNS, SEE BELOW​
BEFORE YOU START
  • Be careful not to touch any hot part of the engine.
DISCLAIMER:
Our pictorials are of informative nature and do illustrate works carried out by ourselves at our own premises for our own use and satisfaction.
Readers who envisage to carry out similar works inspired by the below method shall do this at their own risks and liability.
NOTES:
  • The below works occurred on a Peugeot 208 1.2 VTi but remain similar or identical on many other popular Peugeot and Citroën models.
  • Fan problems on Peugeot and Citroën vehicles could lead to any of the P0493, P0494, P0495, P0691, P0692, P0693 or P0694 DTC fault codes, against which the below fan testing method and control module replacement applies as a first step of the fix. Further fan wiring or fan motor diagnostic will be necessary in case the issue is not fixed.

Peugeot fan control unit (resistor module) removal and diagnostic

A P0494 OBDII fault code on Peugeot or Citroën vehicles denotes a low fan speed problem.
This can be caused by one of two issues:
  1. Defective fan control resistor
  2. Defective fan
The diagnostic in this case includes removing the Peugeot fan assembly from the vehicle and testing the fan by directly connecting it to the battery.
Start by removing the air intake hose and the air box (resonator).
This gives enough access to the fan control unit connectors.
Use a flat screw driver to pull back the safety stop (orange, left picture) and then pull out the fan module connector.
Use a Torx head screw driver to unscrew the only screw that holds the fan control unit to the fan assembly and take it out
There are no particular tests that you can do except a visual inspection, reason why it is necessary to test the fan.

Peugeot engine cooling fan removal and testing

The Peugeot 208 cooling fan is held by the means of 2 Torx screws only.
You can then take it out by gently pulling it upwards in between the catalytic converter and radiator.
Place the fan on your engine and connect it to the battery while securing it with your hand and check it rotates smoothly when powered up. If this is the case, then the fan control module is to blame. No further diagnostic is necessary.

Peugeot fan and fan module refitting

Use a contact cleaner to clean all 3 connectors, the one of the fan and the 2 connectors of the fan resistor module prior to reassembling.

See also...