2012 Peugeot 508 RXH Hybrid4 – Workshop Service & Repair Manual

2012 Peugeot 508 RXH Hybrid4 FAQs: Gearbox, Hybrid, AdBlue & Electrical Issues Answered

• Why does my 2012 Peugeot 508 RXH Hybrid4's semi-automatic gearbox feel jerky or hesitate?

  It's fairly common for the 6-speed EGS semi-automatic gearbox in your 2012 Peugeot 508 RXH Hybrid4 to feel a bit jerky or indecisive sometimes, especially when pulling away or at low speeds. The electric motor does try to smooth things out, but it’s not always seamless. This can happen if the clutch actuator isn't working perfectly, or if the clutch itself is getting a bit worn. Sometimes, the car might even briefly find neutral at low speeds, which is a bit disconcerting.

  To help, you might try a gearbox adaptation or calibration if a specialist can do it. Also, having the clutch and its actuator inspected and potentially serviced proactively can make a real difference. Ensuring the transmission fluid levels are correct is always a good starting point, too.

• My Peugeot 508 RXH Hybrid4 isn't using its electric mode much, or I'm seeing "engine repair needed" warnings. What should I check?

  If your 2012 Peugeot 508 RXH Hybrid4 isn't quite keen on staying in electric mode, or if that pesky "engine repair needed" warning pops up, it could be a few things. Sometimes, a simple issue like an overdue auxiliary belt replacement (around 50,000 miles is a common interval) can confuse the car's system and disable electric and start/stop functions. The car just sees it as a fault, you know?

  Other times, it could be related to the hybrid battery itself – perhaps the charge level is low or there's a difference in cell readings. There's also a component called the "motor reducer" (it helps the electric motor drive the rear wheels) that can cause indecisive gear changes and prevent electric mode. For these more complex hybrid system issues, a diagnostic scan with a specialized tool, like Peugeot's own Diagbox, is usually needed to figure out exactly what's going on. A hybrid specialist would be your best bet for accurate diagnosis and repair.

• Why am I getting AdBlue warning messages on my 2012 Peugeot 508 RXH Hybrid4, and how can I fix them?

  Seeing AdBlue warning messages on your 2012 Peugeot 508 RXH Hybrid4, especially if it's got around 80,000 to 100,000 miles on it, is a pretty common hiccup for these diesel models. It often points to an issue within the AdBlue tank system itself. This could be a fault with the tank, the pump, or even just the sensor that tells the car how much fluid is left. Sometimes it's a persistent warning light, and in some cases, the car might even reduce engine performance.

  Unfortunately, these AdBlue system repairs can be a bit costly, often ranging from £1,500 to £1,800. While you can try to top up the AdBlue fluid if it's low, a persistent warning usually means a component failure. It’s best to get it diagnosed by a Peugeot specialist or a garage familiar with these systems to pinpoint the exact fault and get it properly fixed.

• My 2012 Peugeot 508 RXH Hybrid4 sometimes struggles to start or shows various electrical error codes. What could be the cause?

  It can be really frustrating when your 2012 Peugeot 508 RXH Hybrid4 acts up with starting problems or throws out a bunch of electrical error codes. A simple thing to check first is your 12V car battery – if it's weak or on its way out, it can cause all sorts of electrical gremlins and even prevent accurate fault code readings.

  Beyond that, for a hybrid like yours, issues with the CAN (Controller Area Network) hybrid network can lead to the car not staying running or generating many errors. Sometimes, it's as straightforward as ensuring the main fuse for the traction battery is seated properly. There's also a specific part called the BPGA (Battery Protection and Management Unit) relay that, if faulty, can cause starting woes and sometimes stop your mirrors from deploying when you unlock the car. Definitely worth having a diagnostic scan done to get to the bottom of these electrical puzzles.

• Does my 2012 Peugeot 508 RXH Hybrid4 require special servicing or mechanics?

  Yes, your 2012 Peugeot 508 RXH Hybrid4 is a rather sophisticated car, combining a diesel engine with an electric motor for its unique Hybrid4 system. This means it really benefits from specialized servicing. While regular maintenance like oil changes and filter replacements are standard, the hybrid components – think the high-voltage battery, the electric motor at the rear wheels, and all the associated electronics – require a mechanic with specific training and diagnostic equipment. Many standard garages might not be fully equipped to handle the intricacies of a hybrid system, particularly if complex issues arise.

  So, for any significant troubleshooting or hybrid system-related repairs, it's highly recommended to take your 508 RXH to a Peugeot main dealer or a qualified hybrid specialist. They'll have the right tools, like Peugeot's Diagbox, and the expertise to properly diagnose and fix any hybrid-specific problems, ensuring your car runs as it should.