This Active Carbon Filter (charcoal canister) with reference 1502H6 is designed for Citroën and Peugeot models and is commonly searched by part number—making it easy to find for professional technicians and DIY mechanics. The canister captures fuel vapors from the fuel tank and stores them in activated charcoal until the engine purge system draws them into the intake. Replacement of a faulty canister resolves EVAP-related fault codes such as P0441, P0443 or P0446 and helps restore correct evaporative emissions control and fuel system operation.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C4; Citroën C4 II; Peugeot 308
• Product Codes: 1502H6; 1502.H6; 1502H6 NFP
• Additional Numbers: 1502E5 (three white brackets not included); Related OBD Codes: P0441, P0443, P0446

Function

The canister is part of the EVAP (Evaporative Emission Control) system. It traps fuel vapors in activated charcoal and, when commanded by the engine control system, releases those vapors through the purge solenoid into the intake manifold to be burned in the engine. Proper canister function prevents raw fuel vapor from being vented to atmosphere and avoids drivability problems caused by uncontrolled vapor flow.

Replacement Procedure (Overview)

• Locate The Canister: Depending on model and year, the canister is mounted either in the engine bay area or under the vehicle near the fuel tank.
• Prepare The Vehicle: Work on a cooled vehicle, park on a level surface and support safely if lifting is required. Wear appropriate PPE.
• Disconnect Components: Carefully disconnect electrical connectors and vacuum/fuel vapor hoses. Label hoses to ensure correct reconnection.
• Remove Mounting Hardware: Unbolt the canister from its brackets and remove it. Note that the three white brackets (1502E5) mentioned are not supplied with this unit.
• Install New Canister: Fit the canister, secure mounting bolts, reconnect hoses and connectors using new seals or clips if necessary.
• Finalize: Clear EVAP fault codes with a diagnostic scanner, perform a purge/pressure test and confirm no leaks and correct purge operation.

Installation Recommendations

• Replace brittle or cracked vacuum hoses and worn clips when changing the canister to prevent future leaks.
• Use an OBD-II scanner to clear codes and run an EVAP system test after installation.
• Avoid overfilling the fuel tank—this is a common cause of premature charcoal saturation.
• Handle hoses and connectors gently; replace any damaged seals or clamps. Keep the work area free of open flames and sparks.

Most Common Causes Of Failure

Canister failures are typically caused by charcoal saturation due to fuel contamination or overfilling, physical damage or cracking from heat and age, and blocked or failing purge solenoids and hoses. Faulty purge valves or damaged vapor lines often produce EVAP fault codes (P0441, P0443, P0446) that can be misattributed to the canister unless the entire EVAP circuit is inspected.

Ideal For professional mechanics and knowledgeable DIY customers who search by part number (1502H6) and need a direct replacement for affected Citroën and Peugeot models. Ensure correct fitment by comparing part numbers and visual mounting points prior to installation.