How to carry out replacement: Lambda Sensor 1.6 HDi Citroën C4 mk2
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Change Citroën C4 mk2 1.6 BlueHDi Lambda Sensor yourself – manuals and video tutorials

How to change lambda sensor on CITROËN C4 II (B7) – replacement guide

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When to replace the Lambda Sensor on your CITROËN C4
Recommended replacement interval for the part category Lambda sensor : 100000 km
Important!
This replacement procedure can be used for:
CITROËN C4 II (B7) 2.0 Flex, CITROËN C4 II (B7) 1.6 VTi LPG, CITROËN C4 II (B7) 1.6 THP, CITROËN C4 II (B7) 1.4 VTi, CITROËN C4 II (B7) 1.6 VTi … View more

The steps may slightly vary depending on the car design.

This video shows the replacement procedure of a similar car part on another vehicle

All the parts you need to replace – Lambda Sensor for C4 II (B7) and other CITROËN models
Alternative products
How to change Lambda sensor on Citroën C4 mk2 1.6 HDi – step-by-step instructions for straightforward car repair Lambda sensor
Tools
Replacement: lambda sensor – CITROËN C4 II (B7). Tools you might need:
Wire brush
WD-40 spray
Electronic spray
Copper grease
Torque wrench
Combination spanner #22
22-mm oxygen sensor socket
Ratchet wrench
Thread tap
Fender cover
Buy tools
Replacement: lambda sensor – CITROËN C4 II (B7). AUTODOC experts recommend:
  • After replacing the oxygen sensor, clear the trouble code from the electronic control unit and let the ECU adapt itself to the new sensor.
  • Before getting down to work, start the engine and let it warm up to operating temperature.
  • Please note: all work on the car – CITROËN C4 II (B7) – should be done with the engine switched off.
Carry out replacement in the following order:
  1. Step 1
    Open the bonnet.
    Step 2
    Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.
    Step 3
    How to change Lambda Sensor on Citroën C4 mk2 2009 - free PDF and video manuals
    Detach the oxygen sensor connector.
  2. Step 4
    How to replace CITROËN C4 II (B7) 1.6 HDi 2010 Lambda Sensor - step-by-step manuals and video guides
    Clean the oxygen sensor fastener. Use a wire brush. Use WD-40 spray.
  3. Step 5
    Citroën C4 mk2 1.6 VTi 2011 Lambda Sensor replacement: free workshop manuals
    Unscrew the oxygen sensor fastener. Use a 22-mm oxygen sensor socket. Use a ratchet wrench.
  4. Step 6
    Changing Lambda Sensor on CITROËN C4 II (B7) 2.0 HDi / BlueHDi 2012 by yourself
    Remove the oxygen sensor.
  5. Step 7
    How to remove CITROËN C4 1.4 VTi 2013 Lambda Sensor - online easy-to-follow instructions
    Clean the oxygen sensor mounting seat. Use WD-40 spray.
  6. Step 8
    How to replace Lambda Sensor on CITROËN C4 II (B7) 2014: download PDF manuals and video instructions
    Cut the thread for the new oxygen sensor. Use a thread tap. Use a ratchet wrench.
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