Reduced Engine Power - Code P1026 - 997.2 C4S 2010
12-29-2018, 06:28 PM
#1
3rd Gear
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Reduced Engine Power - Code P1026 - 997.2 C4S 2010
Hi all,
Firstly, just a quick thanks to all contributors on this site - I've been "lurking" for a while and have got some great information and support from you all - thank you!!
So, I've had a a 997.2 C4S 2010 for around 20 months now and absolutely love it. It's been faultless in all of this time and just been a pleasure to drive. Until now!
- Driving locally in town, the car became sluggish and the dash displayed the message "Reduced Engine Power" - I drove it back a home in limp-home mode which was a couple of miles
- I got around to looking at this a couple of weeks later and the car didn't start - Just didn't have enough power to turn over so I suspected/hoped it was the battery
- I swapped the battery for a Bosch S5 (as per recommendations from this site - thanks) and the car started beautifully
- The car went through the PASM and PSM failure and initialisation process and seemed good.
- I drove for a couple of miles and the reduced engine power message reappeared!!
- I checked the diagnostic codes (using a Carista OBD2 reader) which displayed - P1026
- The car is out of warranty and has been serviced by good independents - not main dealers
- I had the car serviced around 5 months ago at an indy
- Mileage is 74k
- I've checked the Porsche website and there are no outstanding recalls relating to my car/VIN
So - what next? From what I'm seeing online, this looks very much like a HPFP failure which necessitates a replacement - I have some questions here:
- Is it worth approaching Porsche to see if they would be willing to do something here or is this pointless since I'm out of warranty and don't have a full service history with the main dealer
- Is this something that should be diagnosed and repaired at a Porsche indy/specialist or can any garage handle this? I ask as I have a great garage minutes away from me that I trust and have good experience with - just not a Porsche specialist? If I need to use an Indy, I'll have to get the car transported which is a nuisance.
Thanks in advance for your thoughts on this.
P.S. depending on how much this costs me, my next question will be around swapping out the PCM3 for something that supports carplay; and maybe a rear spoiler - but first things first!!
Firstly, just a quick thanks to all contributors on this site - I've been "lurking" for a while and have got some great information and support from you all - thank you!!
So, I've had a a 997.2 C4S 2010 for around 20 months now and absolutely love it. It's been faultless in all of this time and just been a pleasure to drive. Until now!
- Driving locally in town, the car became sluggish and the dash displayed the message "Reduced Engine Power" - I drove it back a home in limp-home mode which was a couple of miles
- I got around to looking at this a couple of weeks later and the car didn't start - Just didn't have enough power to turn over so I suspected/hoped it was the battery
- I swapped the battery for a Bosch S5 (as per recommendations from this site - thanks) and the car started beautifully
- The car went through the PASM and PSM failure and initialisation process and seemed good.
- I drove for a couple of miles and the reduced engine power message reappeared!!
- I checked the diagnostic codes (using a Carista OBD2 reader) which displayed - P1026
- The car is out of warranty and has been serviced by good independents - not main dealers
- I had the car serviced around 5 months ago at an indy
- Mileage is 74k
- I've checked the Porsche website and there are no outstanding recalls relating to my car/VIN
So - what next? From what I'm seeing online, this looks very much like a HPFP failure which necessitates a replacement - I have some questions here:
- Is it worth approaching Porsche to see if they would be willing to do something here or is this pointless since I'm out of warranty and don't have a full service history with the main dealer
- Is this something that should be diagnosed and repaired at a Porsche indy/specialist or can any garage handle this? I ask as I have a great garage minutes away from me that I trust and have good experience with - just not a Porsche specialist? If I need to use an Indy, I'll have to get the car transported which is a nuisance.
Thanks in advance for your thoughts on this.
P.S. depending on how much this costs me, my next question will be around swapping out the PCM3 for something that supports carplay; and maybe a rear spoiler - but first things first!!
12-30-2018, 11:58 AM
#3
Three Wheelin'
This does sound like the HIgh Pressure Fuel Pump. Do you have a scanner? The scanner I have will give me a fuel pressure reading to rule either in or out the pump. My ICarsoft can check the readings. I am sure a Durametric will do it too. If the car does not have a warranty and you dont have any dealer relationship I doubt they will do anything. My car had one done under the recall. Cost was about $1000 for the part and $1000 for labor.
12-30-2018, 12:09 PM
#4
Pro
Just my guess, but I think you've got HPFP failure. Your car is running in limp mode on the in-tank low pressure fuel pump (5 bar). Here's what I read on p. 44 in the 2009 Technik Introduction manual I got from PO with my car. Section is titled "Flow control valve for fuel high pressure."
"If the control valve fails, the DME control unit goes into emergency mode, whereby the engine can still operate in a limited manner with low fuel pressure (approx. 5.0 bar). In this case, the bypass valve in the pump opens and provides a direct route from the low-pressure side to the high-pressure side. The Check Engine Light is activated."
FCP Euro sells the Genuine Porsche HPFP for $1100+. I don't find any DIY project on this forum. There are other sources for help on different cars. If there's any good news, this pump looks to be pretty accessible on Bank 1 (driver side) exhaust cam.
https://www.fcpeuro.com/products/por...or-9a111031506
"If the control valve fails, the DME control unit goes into emergency mode, whereby the engine can still operate in a limited manner with low fuel pressure (approx. 5.0 bar). In this case, the bypass valve in the pump opens and provides a direct route from the low-pressure side to the high-pressure side. The Check Engine Light is activated."
FCP Euro sells the Genuine Porsche HPFP for $1100+. I don't find any DIY project on this forum. There are other sources for help on different cars. If there's any good news, this pump looks to be pretty accessible on Bank 1 (driver side) exhaust cam.
https://www.fcpeuro.com/products/por...or-9a111031506
Last edited by swingwing; 12-30-2018 at 01:08 PM. Reason: Changed wording.
01-02-2019, 09:36 AM
#5
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Thank you for the replies guys. For information, this is where I'm at at the moment:
1. I've spoken to my local main dealer and they will run diagnostics on the car next week (£100 charge). Once they have the information they need, they will approach Porsche head office to see if there is any scope to have this work done under "goodwill". They also checked for any open recalls or campaigns and concluded there was nothing pending for my car. However, they did note that it didn't look like my car was ever included in the service campaign for the HPFP back in 2010/2011 so it was never replaced.
2. I've spoken to an Indy and they think around £585+VAT for the genuine part and up to five hours labour - so I'll be looking at around £1200ish to get the work done there.
One further question - does anyone know what the reference number is for the service campaign to swap the HPFP? This may aid in the discussions with the dealership and Porsche head office.
1. I've spoken to my local main dealer and they will run diagnostics on the car next week (£100 charge). Once they have the information they need, they will approach Porsche head office to see if there is any scope to have this work done under "goodwill". They also checked for any open recalls or campaigns and concluded there was nothing pending for my car. However, they did note that it didn't look like my car was ever included in the service campaign for the HPFP back in 2010/2011 so it was never replaced.
2. I've spoken to an Indy and they think around £585+VAT for the genuine part and up to five hours labour - so I'll be looking at around £1200ish to get the work done there.
One further question - does anyone know what the reference number is for the service campaign to swap the HPFP? This may aid in the discussions with the dealership and Porsche head office.