2022 — 2026
1.6L I4 Turbo PHEV (EP6FDT)
PHEV
Test the transition from EV mode to hybrid/ICE mode under acceleration up a steep incline. | Note: Listen for hesitation, harsh vibrations, or clunks from the e-EAT8 gearbox. The switch between electric and petrol power should be smooth; roughness indicates software calibration issues or transmission dampener wear.
Operate the infotainment screen (i-Cockpit) and digital instrument cluster immediately after starting the car cold. | Note: The 3rd Gen 308 is known for system lag, screen freezing, or complete blackouts if the software is outdated. Ensure the system is responsive and check if the latest Peugeot firmware updates have been installed.
Perform a series of slow-speed stops to evaluate the transition from regenerative braking to friction braking. | Note: Feel for any sudden 'bite' or loss of pedal consistency just before coming to a complete stop. Jerkiness here is a common complaint and may require a brake pedal sensor calibration or firmware flash.
Inspect the engine bay specifically for coolant level consistency and signs of crusty pink/blue residue around the hose connections. | Note: The 1.6L EP6FDT PHEV uses a complex dual-loop cooling system (one for the engine, one for the hybrid battery/inverter). Any coolant loss can lead to rapid engine overheating or hybrid system shutdown.
Perform the first major diagnostic scan to check hybrid battery cell balance. Replace engine oil and filter using strict PSA-approved low-ash oil (0W-20 or 0W-30) to prevent Low-Speed Pre-Ignition (LSPI) in the turbocharged engine.
Replace spark plugs (highly stressed due to frequent cold-starts during hybrid transitions), replace cabin and engine air filters, flush the brake fluid, and conduct a load test on the 12V auxiliary battery.
Perform a comprehensive PHEV drive belt replacement, flush both the engine and hybrid battery cooling loops, inspect the timing chain tensioner for slack, and carry out an intake valve carbon clean (walnut blasting).
Always use fuel stabilizer if you run predominantly in pure EV mode, as petrol sitting in the tank for over 3 months will degrade and varnish injectors.
Maintain the 12V AGM auxiliary battery; low voltage in this battery is the primary cause of 'Ghost' hybrid system fault codes and starting failures.
Verify that the charging port locking pin is clean and lubricated; if the pin fails to lock, the vehicle will refuse to initiate AC charging.
Use only high-octane (95 or 98 RON) fuel to minimize carbon buildup on the intake valves of the direct-injected EP6 turbo engine.
Inspect suspension control arm bushings and shock absorbers annually, as the extra 300kg weight of the PHEV battery accelerates wear on NZ's undulating roads.
Estimated repair costs if issues arise
If the vehicle fails to charge on AC home wallboxes, the internal On-Board Charger has likely failed. Check if this is covered under Peugeot's 8-year hybrid component warranty before paying out of pocket.
Because the EP6FDT is a direct-injection engine, fuel does not wash over the intake valves. Carbon builds up over time, causing rough idling and power loss by 80,000km.
PHEVs rely heavily on the 12V battery to boot up high-voltage relays. Must be replaced with an exact AGM/EFB spec battery and coded to the ECU to prevent electrical gremlins.
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Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer