Clean Throttle Body in 2.0 Diesel Engine (Volvo, Ford, Peugeot, Citroen)

How to disassemble and clean throttle body in 136PS diesel engines Volvo 2.0D, Ford 2.0TDCi (136PS & 140PS), Peugeot & Citroen 2.0HDi from oil and carbon deposits. Inspect intake manifold, clean intake air temperature sensor (IAT) and manifold absolute pressure sensor (MAP) and make your diesel engine more responsive to acceleration pedal.

Oil and carbon deposits in throttle body may cause engine to loose power, rough acceleration, smoking while accelerating, problems with starting the engine and shaking when turning it off.

Step 1: Compatibility List

This engine can be found in:

• Citroën C4
• Citroën C4 Picasso
• Citroën C5
• Citroën C8
• Citroën Jumpy / Dispatch
• Fiat Scudo
• Fiat Ulysse
• Ford Focus MK2
• Ford C-Max
• Ford Galaxy
• Ford Kuga
• Ford S-Max
• Ford Mondeo MK4
• Lancia Phedra
• Peugeot 307
• Peugeot 308
• Peugeot 407
• Peugeot 508
• Peugeot 607
• Peugeot 807
• Peugeot Expert
• Volvo C30
• Volvo C70 II
• Volvo S40 II
• Volvo S80 II
• Volvo V50
• Volvo V70 III

Engine codes:

• Citroen/Peugeot: DW10 BTED4
• Ford: G6DB, QXBA, QXWB, QXWA
• Volvo: D4204T

Step 2: Before We Start

You will need:

• flat screwdriver,
• torx T30,
• cleaning solution.

Warning: Wait for you engine to cool down before touching anything.

Attention: Do not start you car or turn the ignition on when sensors are disconnected. This will most likely store a fault in cars memory.

Step 3: Let's Get to Work!

1. Open the hood and locate the throttle body. There are two types: with single and with double inlets.
2. Remove three torx screws from the throttle body.
3. Disconnect two sensors. MAP (manifold absolute pressure) and IAT2 (intake air temperature).
4. Disconnect vacuum line (or lines) from the intake flap (or flaps).
5. Remove the throttle body from the car.
6. Remove screws that hold together sensors and the throttle body.
7. Remove sensors. Be careful and don’t brake the o-ring on each sensor.
8. Clean the throttle body. Don’t use aggressive cleaning solutions. I’ve used petroleum ether. Notice that flaps should move freely.
9. Clean the IAT with petroleum ether. Do not touch the sensor directly, use soft brush.
10. Assemble throttle body and install it back in the car. While installing you can look inside intake manifold and check it for carbon deposits.

Step 4: Test Drive

After reassembling the throttle body and installing it back in car I've noticed that some issues are gone:

• Black smoke on heavy acceleration.
• Engine shaking when turning it off.
• Trouble with starting.
• Regular ride is much smoother.