UK Car

UK car repair questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

I have a HDi 90 406 which has firstly lost power then more…

Customer Question
Hi there, I have...

Hi there, I have a HDi 90 406 which has firstly lost power then more recently stated 'Anti Pollution Fault' Changed the diesel filter not long ago, any idea what is causing the problem?

Mechanic's Assistant: Is the power loss consistent, or does it fluctuate?

Power loss is very consistent, starts and runs fine, but feels like it has about 2/3 the power it originally had

Mechanic's Assistant: What is the model of your '90 Peugeot?

406 HDi 90 2001

Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?

Yes mostly myself though running out of ideas, started with fuel filter change - this was when the power loss started but before the fault showed up

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

No, that's about it

Submitted: 11 months ago.Category: UK Car
Show More
Show Less
Ask Your Own UK Car Question
Answered in 1 hour by:
9/16/2017
UK Auto Mechanic: Matt, Mechanical Engineer replied 11 months ago
Matt
Matt, Mechanical Engineer
Category: UK Car
Satisfied Customers: 23,474
Experience: BEng hons Mech engineering, in auto industry 22 years
Verified

Hello

This could be a lack of fuel pressure from the electrical pump at the tank.

If the connections to this are corroded or damaged then the pump could stop at any time or could not be running at full speed. Check that its relay switches in and out and the relay contacts are clean and bright – replace the relay if in any doubt and do the same for the fuse,

I'd also check all the high pressure hoses post turbo/s for any split hoses or cracked metal pipes, also check the ends of the intercooler as its not unheard of to pop the end caps off under high boost.

If both of these are OK then also check the connections to the EGR valve, if either the vacuum pipe of electrical connection are damaged / corroded then the EGR can be on all time which certainly will hurt performance. Its also possible that its a fault with the EGR valve so its worth removing the valve and cleaning it out with brake cleaner, if it looks particularly clogged then replace it.

If this is OK then check the small vacuum lines to the turbo and its connected control solenoid on the bulkhead, any cracks or leaks can give turbo issues and its best to have the boost pressure measured actually measured with a boost gauge to check that the turbo is healthy and that the sensor is reading correctly

If its a variable vane turbo (they’ll be an actuator on the turbo body - but not a wastegate) then check its vacuum pipework as above and check the connections to the diaphragm / solenoid valve

Also worth checking that the glow-plug relay is switching off as they can stick on and leave the glow plugs also on - on some cars this can force it into limp home

Also worth considering adding a bottle of injector cleaner into the tank as a clogged injector nozzle will reduce power and give poor combustion - the next stage on from this is to remove all the injectors and have them ultrasonically cleaned and flow checked

Ask Your Own UK Car Question
UK Auto Mechanic: Matt, Mechanical Engineer replied 10 months ago

Hi
do you still need help?
Bear in mind that the site takes a deposit from you at the beginning and this is held by the site until you rate my answer at which point the cash is split between the site and the expert. I am only paid for my work on this question if you rate my answer, using the star system at the top of the screen. Please do not forget! Thank you

Ask Your Own UK Car Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with an uk auto mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Matt Your Own Question
Matt
Matt
Matt, Mechanical Engineer
Category: UK Car
Satisfied Customers: 23,474
23,474 Satisfied Customers
Experience: BEng hons Mech engineering, in auto industry 22 years

Matt is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Marty

Marty

European Car Expert

432 satisfied customers

ASE & Bosch Certified Master Tech. Over 30 years experience.

Greg

Greg

Shop Owner

1,367 satisfied customers

17 years Shop Owner /Technician. 27 years experience,

Richard

Richard

UK Car Mechanic

627 satisfied customers

12 years as a technician at a Ford and Jaguar dealer Ford and Jaguar factory certified

Matt

Matt

Mechanical Engineer

23,474 satisfied customers

BEng hons Mech engineering, in auto industry 22 years

Trevor

Trevor

UK Car Mechanic

853 satisfied customers

NVQ 3, Modern Apprenticeship, MOT Tester, 15+ years experience diagnostic technician

Rob

Rob

UK Car Mechanic

823 satisfied customers

city and guilds level 1 2and 3. mot tester , 28 years experience set up training college in afghanistan

martin jones

martin jones

UK Car Mechanic

646 satisfied customers

25 years as a mechanic and mot tester, owned own business for 10 years city and guilds trained

< Previous | Next >

Related UK Car Questions
I have a 2008 citroen c-crosser done 50,000 miles, 3 times i
I have a 2008 citroen c-crosser done 50,000 miles, 3 times i have lost power not completely but will not pull up an incline, also the anti pollution light has come on. … read more
Kevin
Kevin
workshop foreman /master tech/mot tester
1 satisfied customers
Peugeot 406TDi: My Peugeot 406 Tdi estate 2002 -2 litre diesel
My Peugeot 406 Tdi estate 2002 -2 litre diesel has recently been showing anti pollution alert on facia instrument panel and red engine sign appears, this only happens intermittantly, any ideas, is it … read more
Mark
Mark
348 satisfied customers
Peugeot 207 xs 1.6HDI: Yesterday my 207 ( 1,6 hdi 90 hp )
Yesterday my 207 ( 1,6 hdi 90 hp ) lost power driving uphill in a tunell. A bip from the dashboard and in the dash display it was a message : Depollution system faulty. Out of the tunell i stopped the… read more
Robert
Robert
Mechanic/Roadside assist/Garage Owner
Vocational, Technical or Trade Scho
1,707 satisfied customers
Peugeot 407 hi i have a peugot 407 2liter HDI , the engine
hi i have a peugot 407 2liter HDI , the engine managment light came on with anti pollution system fault after filling up with diesel the fault would clear then come back within a few hundered miles , … read more
Matt
Matt
Mechanical Engineer
Bachelor's Degree
23,474 satisfied customers
Automatic..air filter..passenger foot well no different..somewhere
c5 2.2 hdi anti pollen fault automatic lack of power when driving off 2002 model have changed air filter and pollen filter under passenger foot well no different have been told there is another type o… read more
Mike
Mike
Proprieter / Diagnostic Technician
High School or GED
My 307 2 litre hdi is showing 2 warning lights..ESP
my 307 2 litre hdi is showing 2 warning lights 1) anti pollution fault 2) ESP/ASR Before i get it fixed cn you tell me what they mean any idea on cost of work needed. Car goes ok but wont allow quick … read more
Matt
Matt
Mechanical Engineer
Bachelor's Degree
23,474 satisfied customers
peugeot: hdi..diesel in and went onto the motorway..I lost power
I've got a peugeot 307 hdi and I got the dreaded anti-pollution fault at the weekend. As before this happened after i put some diesel in and went onto the motorway. As with the previous time I lost po… read more
Mike
Mike
Proprieter / Diagnostic Technician
High School or GED
hi i have a peugeot 407 hdi 2.0 i had a message anti pollution
hi i have a peugeot 407 hdi 2.0 i had a message anti pollution system faulty i checked the codes and they came up with p1351,p1198,p1434,p1435,p0461,p2408 can you help me by telling me whats wrong whe… read more
Engineering Pro
Engineering Pro
Automotive Development Engineer
Bachelor\u0027s Degree
1,366 satisfied customers
peugeot: hdi..lack of power for the first mile every time..light comes
peugeot 406 hdi 110: lack of power for the first mile every time u drive the car and e m light comes on and says anti pollution fault… read more
Engineering Pro
Engineering Pro
Automotive Development Engineer
Bachelor\u0027s Degree
1,366 satisfied customers
Limp mode..engine warms..it seems to stop,its a diesel 307 hdi 90
hi,i have got an anti pollution fault coming up and the car is going into limp mode,it does this every other day also it is smoking when the engine is cold,once the engine warms up it seems to stop,it… read more
jon-t
jon-t
Vocational, Technical or Trade Scho
895 satisfied customers
Peugeot: Reg..the car back and the battery light..dash lights..key fob
I have a peugeot 406 RAPIER HDI (90) 4 DOOR SALOON (2002 Reg) 1997 Diesel , had a steering rack fitted last week , got the car back and the battery light was staying on after the ignition was turned o… read more
Bill_Crosby
Bill_Crosby
City & Guilds
2,608 satisfied customers
2003 Peugeot: hdi..diesel ) losing power intermittantly
2003 Peugeot 807 2.2 HDi executive (diesel) losing power intermittantly, auntipollution fault showing on screen.… read more
Bill_Crosby
Bill_Crosby
City & Guilds
2,608 satisfied customers
Peugeot: .It..drove home..engine management light..accelerator it died
i have a peugeot estate 406 HPI 2002 .It has passed its M.O.T today and drove home and when i got home me,my wife and the kids got into the motor and drove to the end of the road and the engine manage… read more
Paul O&#039;Connor
Paul O'Connor
Cer Repair Centre Owner
Vocational, Technical or Trade Scho
38 satisfied customers
Peugot 206 ,1.9 diesal engine.diesal tank was filled with petrol.
peugot 206 ,1.9 diesal engine.diesal tank was filled with petrol.Was taken to a garage where ,WORK COMPLETED WAS: drain mixed fuel from tank.Fill and bleed fuel system.The car drove without a hitch fo… read more
Chris_C UK
Chris_C UK
City & Giulds I,II & III Technician
16 satisfied customers
Peugeot: diesel..it its 2000 turbo 90 hdi year..year 2000
hi can i run my peugeot 406 hdi on veg oil mixed with diesel without changing it its 2000 turbo 90 hdi year 2000… read more
Matthew Lawe
Matthew Lawe
Bachelor's Degree
240 satisfied customers
i own a peugeot 406 it wont start and on the screen it comes
i own a peugeot 406 it wont start and on the screen it comes up anti pollution engine fault… read more
Mike
Mike
Proprieter / Diagnostic Technician
High School or GED
mY 307 2.0 HDI 110 BHP car constantly displays change diese
mY 307 2.0 HDI 110 BHP car constantly displays "change diesel filter" (which has been changed) and sometimes displays "anti pollution fault" which slows the car down. I have just spent £850 having a n… read more
Grizz
Grizz
Mobile Mechanic
Ceritficate of Pre-Vocational Educa
290 satisfied customers
i have a citroen c8 2.0 hdi it came up with a warning diesel
i have a citroen c8 2.0 hdi it came up with a warning diesel meter blocked now the little orange engine light is on and it wont accelerate over 40-50mph i am assuming this is linked as in the error bo… read more
Mike
Mike
Proprieter / Diagnostic Technician
High School or GED
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x