Gabs238

**RESOLVED** I thought I'd post an update for the benefit of those who helped me, as well as anyone Googling this in the future looking for a solution. In short, replacing the LP fuel pump and replacing the battery fixed the problem. The LP pump was just a guess but at this stage I was happy to invest the money, and the battery diagnostics initially came back fine (67% life, no issues, mechanic said he didn't see a reason to replace it), but once I explained my issues with the battery draining rapidly after a few days of no use, he said it may be a case of some faulty cells. As a new battery is pretty cheap, I asked him to go ahead and replace my old one with a brand new one. The car runs great again, including starting much quicker, and crucially no more fuel rail pressure sensor faults (having done 600-700 miles now since the new LP pump and new battery). The main thing that I would do differently next time is to immediately replace the battery when buying a ~10 year old second hand car - it would have avoided some battery issues over the past 3-4 months, and would have also helped pinpoint any other faults more quickly by eliminating the battery as a potential source of issues. Thanks again for all the help and input, I really appreciate it!

Thanks, I hadn't realised Seat were also part of VAG, I thought it was only VW and Audi. I'll broaden my search accordingly.

Good info, I really appreciate it! I'll take that into account and will see whether I can get a Skoda specialist to look at the car, as it sounds like they may be better suited to diagnosing this issue. Interesting, thanks for sharing! I'll flag the battery idea up as one potential avenue to look into then, it sounds like it wouldn't be far fetched for it to be an issue then. "Telling me that the battery needs to be in a decent state to receive and send back signals to the cars systems to say all ok." certainly seems to make sense to me.

Thanks Kostas123! I tried to summarise it very briefly so I haven't been able to completely do them justice. They've been very transparent throughout the whole process and I feel like replacing the LP fuel pump is still a worthwhile endeavour, so it's me who is asking them to go ahead with it, but if it doesn't work then I'll try a new garage. The current one is a 2 min walk from my house and have spent a lot of time on the car so I've tried to stick with them for now, but I'll take the car to a Skoda specialist as a next step.

Thanks both, much appreciated! One thing I've come across online this evening is that an old battery can cause strange symptoms on Octavias, even when fully charged. Is it possible this applies to Rapids too? I haven't a clue how old my battery is, but it may be pretty ancient. inspectorman: That makes sense, I'll ask them to replace the sensor too. On the off chance it's the wiring / connector that is faulty and not the sensor itself, how is something like that normally dealt with? Is it hard to have tyat wiring replaced? In terms of the fuel manifold, that's good to know! As you say, hopefully has had enough mechanic time to be spotted, but always good to be aware of it. Breezy_Pete: I'll give that a try. I assume fuel inside the connector would imply a physical/mechanical failure of the sensor, which could cause the intermittent fault? I suspect this would have been spotted by the auto electrician when checking the sensor, but I'll check the connector myself when I get the car back after the LP fuel pump replacement.

've owned a petrol 62 reg Skoda Rapid (1.2 TSI) for almost 18 months now. I'm having repeated fuel rail pressure issues and it's starting to drive me (and my local garage) nuts, so I'm turning to Briskoda for some help. 2022 October - broke down on the motorway due to a cylinder misfire. Turned out to be a faulty HT lead; out of precaution (as I'd bought the car used), I got all HT leads, all spark plugs, and coil pack replaced. 2023 Mar-May - a couple of instances where the car loses acceleration and enters limp mode, but is immediately fine after stopping in services and restarting the engine. Didn't investigate further. Starts to idle rough and mildly shake whilst driving, but difficult to tell if actually a new issue or just never noticed. 2023 Sept - loss of acceleration (limp mode) + EML + EPC light. I'd bought a basic OBD reader by this point and it was giving the following errors: Charge pressure actuator. P334B00 Fuel Rail Pressure Sensor "A" Circuit. P019100 Garage diagnosed it as faulty turbo wastegate actuator (with the fuel rail pressure fault as a result of trying to compensate for turbo issues), had a new one fitted. 2023 Sept - after having the car back a few days, same issue (loss of acceleration + EML + EPC light), but this time only giving the fuel rail error code. When it does run, it idles really roughly, and sometimes just dies at red lights. Garage try to diagnose issue; no luck, so they get autoelectrician in. Autoelectrician points to the high pressure fuel pump being faulty, they replace it. 2023 Oct - after having the car back a few days, it's obvious that the rough idling has immediately been resolved, no dying at red lights, and no entering limp mode randomly anymore, so I thought we'd finally cracked it. A few days later, limp mode + EML + EPC light... I take the car back to the mechanic and at this point they have no idea what's wrong. They got the autoelectrician back who couldn't find any issues. They tried a new fuel filter but still same issue when they did a long test drive. They're waiting on a quote from Skoda on a new low pressure (lift) pump, but were open in saying that at this point it's just pure guesswork trialling new components, and it's up to me how far I want them to take it. Now - It's driving me nuts as it's an intermittent error and otherwise the car drives beautifully for its age, but I'm at my wit's end. The car cost me ~£4900 new in June 2022 (~78k miles) and I've had to spend over £1300 on these turbo + fuel system issues so far in the last couple of months, with no solution on the horizon, having only driven it 12k miles (including servicing). Should I also ask to have the fuel rail pressure sensor itself changed just in case it's faulty, despite showing up as OK when examined by the autoelectrician? If neither LP pump replacement nor sensor replacement work, what would be the next steps? Are there any other components to replace in the fuel system? Are there any other known problems (from outside the fuel system) that could cause this error code and these symptoms? Do I take it to a Skoda specialist? At what point do I call it quits and get rid of it despite being an excellent budget car? It seems like a phantom issue and it seems insane to take a big loss selling what is otherwise a car which is in great nick, but at the same time if a new LP fuel pump and new sensor don't fix it, I'm starting to worry this won't ever get resolved. Any advice, comments, etc. would be gratefully received. Thanks!

Hi all, Happy owner of a 62 reg Rapid - it's a lovely budget car and I've really enjoyed driving it over the last 18 months. I've been having some issues with it recently which even the garage can't seem to fix, so I thought I'd register on this forum and put the questions out to the knowledgeable people of Briskoda! Thanks, -G