Autopapyrus · Renault Fluence 1.5 dCi K9K (2012)
https://autopapyrus.com/guides/renault/fluence/egr-valve-removal-and-cleaning/
https://autopapyrus.com/guides/renault/fluence/egr-valve-removal-and-cleaning/
Compiled automatically from service literature and owner experience. Specs are for the typical configuration — check them against your exact car before you start.
Renault Fluence 1.5 dCi K9K (2012): EGR Valve Removal and Cleaning
On the K9K, the electrically actuated EGR valve is mounted on the intake tract and connected to the exhaust manifold by a pipe. It clogs with soot and oily carbon deposits, which causes hesitation, smoke, a rough idle, EGR fault codes (for example P0401, P0403) and limp mode (reduced power). The valve must be cleaned off the car, and you must never soak the electric actuator in liquid.
Parts
4| № | Part | Alternatives |
|---|---|---|
| 01 | EGR valve gasket for K9K | |
| 02 | Exhaust gas feed pipe gasket (or O-ring) | |
| 03 | Throttle body and EGR cleaner | |
| 04 | EGR valve assembly for K9K 1.5 dCiif the electric actuator is faulty or the housing is cracked | Pierburg, Valeo, Delphi |
Tools
9- Socket set and ratchet
- Torx and hex bits
- flat-blade screwdriver
- throttle body/EGR cleaner (spray)
- brush with plastic or brass bristles
- shop rags
- new valve gaskets
- OBD scanner for clearing codes
- gloves and safety glasses
There's a full repair manual for this car
Every system, wiring diagrams and torque specs — not just this job. Haynes AutoFix (online).
See manuals →
Step by step
11 steps- Shut off the engine and let it cool down completely: the exhaust system and the EGR pipe get very hot. Disconnect the negative battery terminal.
- Remove the engine cover and, if necessary, the air duct or air filter housing that blocks access to the valve. Note how the hoses are routed and release them from their clips.
- Press the retaining tab and disconnect the EGR valve electrical connector. If there are vacuum or coolant lines nearby, label them and disconnect them.
- Unscrew the bolts that hold the exhaust gas feed pipe to the exhaust manifold (or to the EGR cooler, if equipped). The bolts often seize: apply penetrating oil and loosen them smoothly, without jerking, so you don't round off the heads.
- Remove the EGR valve mounting bolts (usually 2-3) and carefully take off the valve together with the pipe. Plug the open port in the intake manifold with a clean rag (don't leave any shreds inside) so dirt and fasteners can't fall into the intake tract.
- Inspect the valve: the flap should move freely and seat tightly against its seat. If the flap is stuck, the carbon is layered and hard, the housing is cracked, or the valve still sets codes after cleaning, replace it as a complete unit.
- Soak the carbon deposits with the cleaner spray for 10-15 minutes. Scrape them off the passages, flap and seat with a plastic or brass brush and a rag. Do not wet the electric actuator (the upper part with the connector); wipe it only with a dry or slightly damp rag. Do not force the flap down with your finger or a screwdriver, and do not put load on the stem.
- Clean the gas feed pipe from the inside and the mating surface on the intake manifold. Scrape off any remains of the old gasket, taking care not to drop them inside. If there is a lot of oily carbon in the intake manifold, clean it too while the valve is off.
- Let the parts dry, fit new gaskets and reassemble in reverse order. Tighten the valve and pipe bolts in a crisscross pattern. The torque for these fasteners is low, roughly 8-25 N·m (6-18 lb-ft) depending on the bolt; use the exact values from the manufacturer's specifications.
- Reconnect the connector, hoses and air ducts, then the battery. Read and clear the codes with a scanner. If a valve adaptation reset procedure is required, perform it with the scanner.
- Start the engine, warm it up and check for any whistling or hissing (a vacuum or exhaust gas leak) at the joints. Take a test drive of 10-15 minutes, including some higher-rpm driving if needed. Make sure the codes do not return.
Common mistakes and warnings
- Do not disable the EGR or block it off with a plug if you want legal and safe operation: this can cause fault codes and worse emissions
- If the code returns after cleaning, also check the pressure or temperature sensor, the wiring, the EGR cooler and the vacuum side, and if you lack experience, take the car to a repair shop
- Do not spray cleaner under pressure onto the electric actuator and position sensor, as they will fail