HPFP failure - help & advice
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Joined: Jan 2022
Posts: 104
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W204 2013 C250 Coupe
HPFP failure - help & advice
Hi everyone, I think my HPFP gave out while accelerating on the highway today. I accelerated on an uphill and all of a sudden and the car shuddered and lost most if not all acceleration/torque. I pulled aside and turn the engine off/on and it seems fine as long as I didn't accelerate hard past ~2.5k rpm. as soon as Id accelerate a little hard, the car would go into limp mode.
I have exactly one month left out of the extended HPFP warranty. I will pull the codes on Monday from a local mechanic shop.
1. what are the code(s) associated with HPFP failure that MB will accept/honour the warranty for? (in other words, the cam adjuster ext warranty had a set of specific codes where MB would accept and would replace the adjusters if only those codes were present, is there such a thing for the HPFP? is so what are they?)
2. beside a check engine light, is there any other warnings/errors that pop up? I didn't get any messages that said "limp mode" or any of the sort, is that still consistent with HPFP failure?
thank you in advance
I have exactly one month left out of the extended HPFP warranty. I will pull the codes on Monday from a local mechanic shop.
1. what are the code(s) associated with HPFP failure that MB will accept/honour the warranty for? (in other words, the cam adjuster ext warranty had a set of specific codes where MB would accept and would replace the adjusters if only those codes were present, is there such a thing for the HPFP? is so what are they?)
2. beside a check engine light, is there any other warnings/errors that pop up? I didn't get any messages that said "limp mode" or any of the sort, is that still consistent with HPFP failure?
thank you in advance
Junior Member
Joined: Aug 2019
Posts: 18
Likes: 5
From: Almost Heaven, WV
2012 C350 4matic Coupe
Codes are listed on here. Suggest searching forums for most complete list for your model year and printing off so you can have with you when you pull codes from car.
Could be several other things also? May be as simple as a bad Accelerator Pedal Position Sensor? Good luck
Could be several other things also? May be as simple as a bad Accelerator Pedal Position Sensor? Good luck
Junior Member
Joined: Sep 2018
Posts: 63
Likes: 12
2017 C250 W205
Some reading matter for you:
https://mbworld.org/forums/c-class-w...ost-power.html
My experience from November 2018, posted in that thread:
"Had a similar issue with my C180KBE (M271 Compressor engine) with the 5G-tronic last Friday on the Autobahn.
Was in top gear, doing approx. 75 mph and stepped on the gas somewhat harder but without inducing a downshift.
All of a sudden there was a knock and the engine started to run irregularly.
The Check Engine Light did not come on and there were no display messages.
Slowed down and cruising along without load the engine ran quite smoothly but the momentary fuel consumption was very high.
Stopped after a few miles at the next rest stop, shut the engine, pulled out the key and waited a few minutes.
Restarted the engine after a while and it ran perfectly fine and has done so ever since.
Called my Mercedes dealer on Monday and they recommended for me to just continue driving as there won’t be anything stored in the fault memory.
Since then I covered about 500 mls and everything is o.K.
Nevertheless I really love this car!"
Since that day four and a half years ago I covered about 80.000 KM / 50.000 miles and that issue never cropped up again.
https://mbworld.org/forums/c-class-w...ost-power.html
My experience from November 2018, posted in that thread:
"Had a similar issue with my C180KBE (M271 Compressor engine) with the 5G-tronic last Friday on the Autobahn.
Was in top gear, doing approx. 75 mph and stepped on the gas somewhat harder but without inducing a downshift.
All of a sudden there was a knock and the engine started to run irregularly.
The Check Engine Light did not come on and there were no display messages.
Slowed down and cruising along without load the engine ran quite smoothly but the momentary fuel consumption was very high.
Stopped after a few miles at the next rest stop, shut the engine, pulled out the key and waited a few minutes.
Restarted the engine after a while and it ran perfectly fine and has done so ever since.
Called my Mercedes dealer on Monday and they recommended for me to just continue driving as there won’t be anything stored in the fault memory.
Since then I covered about 500 mls and everything is o.K.
Nevertheless I really love this car!"
Since that day four and a half years ago I covered about 80.000 KM / 50.000 miles and that issue never cropped up again.
Last edited by Joe1959; May 15, 2023 at 07:55 AM.
Junior Member
Joined: Jan 2022
Posts: 45
Likes: 5
c250 W204
Hi everyone, I think my HPFP gave out while accelerating on the highway today. I accelerated on an uphill and all of a sudden and the car shuddered and lost most if not all acceleration/torque. I pulled aside and turn the engine off/on and it seems fine as long as I didn't accelerate hard past ~2.5k rpm. as soon as Id accelerate a little hard, the car would go into limp mode.
I have exactly one month left out of the extended HPFP warranty. I will pull the codes on Monday from a local mechanic shop.
1. what are the code(s) associated with HPFP failure that MB will accept/honour the warranty for? (in other words, the cam adjuster ext warranty had a set of specific codes where MB would accept and would replace the adjusters if only those codes were present, is there such a thing for the HPFP? is so what are they?)
2. beside a check engine light, is there any other warnings/errors that pop up? I didn't get any messages that said "limp mode" or any of the sort, is that still consistent with HPFP failure?
thank you in advance
I have exactly one month left out of the extended HPFP warranty. I will pull the codes on Monday from a local mechanic shop.
1. what are the code(s) associated with HPFP failure that MB will accept/honour the warranty for? (in other words, the cam adjuster ext warranty had a set of specific codes where MB would accept and would replace the adjusters if only those codes were present, is there such a thing for the HPFP? is so what are they?)
2. beside a check engine light, is there any other warnings/errors that pop up? I didn't get any messages that said "limp mode" or any of the sort, is that still consistent with HPFP failure?
thank you in advance
Thread Starter
Member
Joined: Jan 2022
Posts: 104
Likes: 6
W204 2013 C250 Coupe
Thank you all for your replies!
I got the codes pulled from a local mechanic and one of the codes was for low fuel pressure - I'm not sure what the other codes were and whether those were triggered by the low fuel pressure or are something independent of the low fuel pressure. regrettably I didn't get a chance to find what the exact codes were. I will go back to the same mechanic for an oil change on Friday and pull the exact codes again (if they're still there).
In the meantime, I booked an appointment with MB to get a diagnosis in 3 weeks to get a diagnosis on whether it is the HPFP.
that being said I have a couple questions
1. my CEL turned off today whiled driving the car from the mechanics. How long are codes stored for in the ECU?
2. Will driving the car make the codes clear faster? I couldn't replicate the issue even driving it hard.
I'm a bit worried that when it comes to the MB appointment that the codes have cleared and they wouldn't be able to replicate the issue.
I got the codes pulled from a local mechanic and one of the codes was for low fuel pressure - I'm not sure what the other codes were and whether those were triggered by the low fuel pressure or are something independent of the low fuel pressure. regrettably I didn't get a chance to find what the exact codes were. I will go back to the same mechanic for an oil change on Friday and pull the exact codes again (if they're still there).
In the meantime, I booked an appointment with MB to get a diagnosis in 3 weeks to get a diagnosis on whether it is the HPFP.
that being said I have a couple questions
1. my CEL turned off today whiled driving the car from the mechanics. How long are codes stored for in the ECU?
2. Will driving the car make the codes clear faster? I couldn't replicate the issue even driving it hard.
I'm a bit worried that when it comes to the MB appointment that the codes have cleared and they wouldn't be able to replicate the issue.
Senior Member
Joined: Jun 2016
Posts: 462
Likes: 152
From: Panama City, FL
2020 C300, 2013 C250, 2000 Boxster S
Thank you all for your replies!
I got the codes pulled from a local mechanic and one of the codes was for low fuel pressure - I'm not sure what the other codes were and whether those were triggered by the low fuel pressure or are something independent of the low fuel pressure. regrettably I didn't get a chance to find what the exact codes were. I will go back to the same mechanic for an oil change on Friday and pull the exact codes again (if they're still there).
In the meantime, I booked an appointment with MB to get a diagnosis in 3 weeks to get a diagnosis on whether it is the HPFP.
that being said I have a couple questions
1. my CEL turned off today whiled driving the car from the mechanics. How long are codes stored for in the ECU?
2. Will driving the car make the codes clear faster? I couldn't replicate the issue even driving it hard.
I'm a bit worried that when it comes to the MB appointment that the codes have cleared and they wouldn't be able to replicate the issue.
I got the codes pulled from a local mechanic and one of the codes was for low fuel pressure - I'm not sure what the other codes were and whether those were triggered by the low fuel pressure or are something independent of the low fuel pressure. regrettably I didn't get a chance to find what the exact codes were. I will go back to the same mechanic for an oil change on Friday and pull the exact codes again (if they're still there).
In the meantime, I booked an appointment with MB to get a diagnosis in 3 weeks to get a diagnosis on whether it is the HPFP.
that being said I have a couple questions
1. my CEL turned off today whiled driving the car from the mechanics. How long are codes stored for in the ECU?
2. Will driving the car make the codes clear faster? I couldn't replicate the issue even driving it hard.
I'm a bit worried that when it comes to the MB appointment that the codes have cleared and they wouldn't be able to replicate the issue.
2. Depends on the code. The codes are stored, but depending on the code, the MIL will clear after so many drive cycles if the condition causing the code goes away.
Last edited by alynch; May 15, 2023 at 03:02 PM.
Thread Starter
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W204 2013 C250 Coupe
thank you all again. I appreciate it
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Thread Starter
Member
Joined: Jan 2022
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W204 2013 C250 Coupe
Senior Member
Joined: Jun 2016
Posts: 462
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From: Panama City, FL
2020 C300, 2013 C250, 2000 Boxster S
I'm not sure I would take it out for the Italian tune-up. The HPFP is mechanically connected to the back of the intake camshaft. If there is a problem with the HPFP and it fails, it could take out more than just the pump. It's bad enough raiding the piggy bank for a new pump without having to dig much, much deeper for other top-end parts.
Thread Starter
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W204 2013 C250 Coupe
So I got the codes
P0299-21 Turbo Boost Low
P053A-00 Crankcase Vent Heater
P061A Torque Control Overheat
P008A-21 Fuel Low Pressure
I have no idea what to make of it, Id appreciate any guidance on what the issue may be
Edit: could one or more of these codes (P0299-21, P053A-00, P061A) be set off by the low fuel pressure (P008A-21) or are these codes completely independent of each other?
or could the P061A Torque Control Overheat cause the other codes? (It was a decently warm day, 35C, and drove 100miles on the day it happened)
P0299-21 Turbo Boost Low
P053A-00 Crankcase Vent Heater
P061A Torque Control Overheat
P008A-21 Fuel Low Pressure
I have no idea what to make of it, Id appreciate any guidance on what the issue may be
Edit: could one or more of these codes (P0299-21, P053A-00, P061A) be set off by the low fuel pressure (P008A-21) or are these codes completely independent of each other?
or could the P061A Torque Control Overheat cause the other codes? (It was a decently warm day, 35C, and drove 100miles on the day it happened)
Last edited by spb147; May 19, 2023 at 09:34 PM.
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2008 c300 manual, 2012 c300 4matic, 2008 r320, 2012 c250 3.5l swapped, glc 63
You have a bad pcv pipe, it’s a whole assembly. Next I’d say hpfp is definitely a culprit to the low pressure but the low boost could be due to a boost leak or a ruptured hose somewhere near intercooler usually.
also low boost could be due to the fuel pump and engine acting sluggish and not staying in the power band like it’s supposed to do.
also low boost could be due to the fuel pump and engine acting sluggish and not staying in the power band like it’s supposed to do.
Thread Starter
Member
Joined: Jan 2022
Posts: 104
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W204 2013 C250 Coupe
You have a bad pcv pipe, it’s a whole assembly. Next I’d say hpfp is definitely a culprit to the low pressure but the low boost could be due to a boost leak or a ruptured hose somewhere near intercooler usually.
also low boost could be due to the fuel pump and engine acting sluggish and not staying in the power band like it’s supposed to do.
also low boost could be due to the fuel pump and engine acting sluggish and not staying in the power band like it’s supposed to do.
Is this the PCV assembly youre referring to? https://www.autohausaz.com/pn/150514...waAjrSEALw_wcB
or is there more to it? and how would I go about replacing this?
I read on a thread that P008A is for the low pressure fuel pump and not the HPFP, is this correct?
#4 on this thread https://mbworld.org/forums/c-class-w...de-p0008a.html
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2008 c300 manual, 2012 c300 4matic, 2008 r320, 2012 c250 3.5l swapped, glc 63
I have not done a pcv on a c250 w204 but have done plenty on the w205 and yes it looks somewhat like that, runs around the whole engine. Also haven’t seen a dead fuel pump yet but code suggest that there was low fuel pressure in the low system which could mean 2 thing either your pump is dying or the sensor is going bad or you’ve run out of fuel before and it is a stored code that stayed in the computer.
