TorqFix

C5(X7) - DW12C — CITROEN

C5(X7) - DW12C on Citroen: 66 steps, engines DW12C(4HL). What to remove, in what order, and what to check after.

Workshop procedure for CITROEN — the exact step sequence and torque figures, straight from real workshop data.

66 steps 1 engine code

🧭 Before you start

Fits: platform codes 2.2, HDI, 16V, FAP

Don't miss

  • Caution! Note the additive hazard warnings
  • Do not re-use the drained fluid or fluid from opened containers

🔧 Engine codes this applies to

DW12C(4HL)

📐 19 workshop diagrams for DW12C(4HL)

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

C5(X7) - DW12C — DW12C(4HL) · diagram 1
C5(X7) - DW12C — DW12C(4HL) · diagram 2
C5(X7) - DW12C — DW12C(4HL) · diagram 3
C5(X7) - DW12C — DW12C(4HL) · diagram 4
C5(X7) - DW12C — DW12C(4HL) · diagram 5
C5(X7) - DW12C — DW12C(4HL) · diagram 6
C5(X7) - DW12C — DW12C(4HL) · diagram 7
C5(X7) - DW12C — DW12C(4HL) · diagram 8
+ 11 more diagrams
🔒 19 workshop diagrams for this job Ask about your Citroen DW12C(4HL) — free or sign up free to see the drawings

📋 Procedure

Preparation and removal

  1. Caution! Note the additive hazard warnings
  2. Note: Do not re-use the drained fluid or fluid from opened containers
  3. Check the tightness of the turbocharger hoses
  4. Note: The fuel tank should contain at least 20 litres of fuel
  5. Select the highest suspension position
DW12C(4HL)? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Remove the underbody cover
  2. Disconnect the line(s)
  3. Without diagnostic tool:
  4. Connect the diagnostic tool
  5. Read out the fault codes
  6. Note: Plug the ends of the fuel lines
  7. Activate the diesel particulate filter regeneration function
  8. Release the clip(s)
  9. Note: Plug all open lines to prevent damage
  10. Disconnect the battery
  11. Remove the additive tank
  12. Run the engine at idle speed
  13. Wait until the engine has cooled down
  14. Stop the engine
  15. Raise the vehicle
  16. Remove the underbody cover
  17. Disconnect the filler pipe
  18. Disconnect the filler pipe
  19. Empty the additive tank
  20. Collect the escaping fluid in a measuring container
  21. Check the additive level

Installation and checks

  1. Connect the additive tank filling kit filler pipe to the additive tank filler pipe
  2. Connect the overflow container pipe to the additive tank
  3. Raise the filling container above the additive tank
  4. Open the filling container valve
  5. Close the valve when fluid is escaping through the overflow pipe
  6. Disconnect the additive tank filling kit filler pipe from the additive tank filler pipe
  7. Disconnect the overflow pipe
  8. Remove the filling and overflow container
  9. Reconnect the filler pipe
  10. Refit the cover
  11. Lower the vehicle
  12. Use the diagnostic tool
  13. Refit the additive tank
  14. Installation is in the reverse order of removal
  15. Refill the additive tank
  16. Refit the cover
  17. Use the diagnostic tool
  18. Reprogram the additive pump
  19. Using the diagnostic tool:
  20. Check the additive level
Workshop diagrams

Ask TorqFix about your Citroen DW12C(4HL) — it answers with the exact sequence for that engine and the workshop drawing for each step. First question is free after a 20-second sign-up, no card.

Ask about your Citroen DW12C(4HL) — free → or sign up free to see the drawings

Other CITROEN procedures

Who makes these pages, and how

TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.

The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.

Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.

Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com

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Workshop data on this page last updated 20 Sep 2026.