Volvo

Have Volvo questions? Ask a Volvo mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

I have a 2014 Volvo S60 T5. It is throwing codes: P0305,

Customer Question
P0304,P0300. I replaced the spark...
I have a 2014 Volvo S60 T5. It is throwing codes: P0305, P0304,P0300. I replaced the spark plugs and the coil packs. The codes are still there and it runs very poorly. The check engine light is on and the car says,"Reduce speed or shift up". This just started happening, but for a while the belt tensioner would squeal at start up. I am not sure if a bad tensioner could cause misfires, but I thought I would throw it out there. The AC isn't very good now either.
Submitted: 3 months ago.Category: Volvo
Show More
Show Less
Ask Your Own Volvo Question
Answered in 5 hours by:
3/22/2018
Volvo Mechanic: Gary, ASE Certified Technician replied 3 months ago
Gary
Gary, ASE Certified Technician
Category: Volvo
Satisfied Customers: 1,899
Experience: Senior Technician
Verified

Hello! My name is Gary.
Welcome to JustAnswer.
I'm reviewing your question now, and will post back with a reply shortly.

Ask Your Own Volvo Question
Volvo Mechanic: Gary, ASE Certified Technician replied 3 months ago

Hello David,

Misfire on adjacent cylinders, generally head gasket failure.

Can you do a compression test please, all spark plugs out?

Your tensioner noise is because of the misfiring.

Gary

Ask Your Own Volvo Question
Volvo Mechanic: eric remington,
 replied 3 months ago
eric remington
Category: Volvo
Satisfied Customers: 862
Experience: mechanic/service advisor at topline auto
Verified

Do you want a list of possible causes of misfires or would you like me to assist you find and repair the problem s?

Ask Your Own Volvo Question
Volvo Mechanic: eric remington,
 replied 3 months ago

I am ASE certified in advanced engine performance

Ask Your Own Volvo Question
Customer reply replied 3 months ago
I would like to figure out what is causing the issue, so I can correct it.
Volvo Mechanic: eric remington,
 replied 3 months ago

o​k are you willing to perform testing at my lead in order to accomplish this?

Ask Your Own Volvo Question
Customer reply replied 3 months ago
but within reason.
Volvo Mechanic: eric remington,
 replied 3 months ago

if you have any limitations, during the course of testing, you may inform me and I will try to find an alternate method to find data needed

Ask Your Own Volvo Question
Volvo Mechanic: eric remington,
 replied 3 months ago

Any testing that I ask you to perform is nothing that I would not be willing to perform myself. Now I don't know your skill level and what tools and equipment you possess...make sense?

Ask Your Own Volvo Question
Volvo Mechanic: eric remington,
 replied 3 months ago

D​o you have a full function scanner able to display data, trouble codes and ability to access multiple modules that vehicle has? If not do you have any other scan tool of lesser degree that can access at least power train control module? do you own a test light, noid light logic probe , multimeter ? list any of the above please

Ask Your Own Volvo Question
Volvo Mechanic: eric remington,
 replied 3 months ago

fu​el pressure tester, compression tester, vaccum gauge...if you don't have these items we will work around them. Willing ness makes the way. a positive attitude and a willingness to locate the problem thru a process fo elimination can bring results...are you with me?

Ask Your Own Volvo Question
Volvo Mechanic: eric remington,
 replied 3 months ago

many things can cause misfires...so in order to determine cause of problem s we must test areas of potential cause. this may take time...do you wish to proceed?

Ask Your Own Volvo Question
Volvo Mechanic: eric remington,
 replied 3 months ago

F​ro example having a scanner may help give vital information but may not reveal the entirety of problem. but it may help one to proceed down a correct diagnostic path

Ask Your Own Volvo Question
Volvo Mechanic: eric remington,
 replied 3 months ago

I​f you have some diagnostic items listed that is fine if you have none fine I just want to know the best approach. most of these items we can get around so if you don't have any of these or only some that's ok

Ask Your Own Volvo Question
Volvo Mechanic: eric remington,
 replied 3 months ago

So how would you like to proceed? I need y0ur input in order to help you

Ask Your Own Volvo Question
Customer reply replied 3 months ago
I only have a basic ODBII code reader, but I can get loaner tools fro the auto store. No smoke coming from the tail pipe. My son put in a K&N air filter and he had the muffler remover and they installed a straight pipe. I am not sure if that could have messed with the system.
Volvo Mechanic: eric remington,
 replied 3 months ago

ok so when did problem start? out of blue? or did you you work on vehicle or someone else? does your code reader have the ability to get data? probably not...ok you have tried coils.. and misfire consistent.? do this ....place a tall long screwdriver or similar apparatus such as a coat hanger and listen to injectors and see if you can hear a consistent clicking ,opening and closing of injectors, compare working cylinders with non working...itll be like a tic tic ...so the first step in our diagnostic process. hold the apparatus up to your ear and vibration/noise will transfer thru the tool to your ear may even be able to feel the vibration from injector opening and closing. injectors are provided battery power on one wire while the other wire is grounded via an electronic pulse

Ask Your Own Volvo Question
Volvo Mechanic: eric remington,
 replied 3 months ago

you can buy steth ascope for ten bucks I own one but I probably use it more than you so you don't have to have one but nice to have

Ask Your Own Volvo Question
Volvo Mechanic: eric remington,
 replied 3 months ago

let me know if you don't hear injectors opening closing (clicking noise-very apparent) noise. this doesn't mean that the injector is putting the correct amount of fuel in cylinder or not... but it does tell us whether or not the injector is opening or closing

Ask Your Own Volvo Question
Volvo Mechanic: eric remington,
 replied 3 months ago

I​f we know that the injector is not firing then we know that is an area of focus for further testing

Ask Your Own Volvo Question
Customer reply replied 3 months ago
He did the air filter and muffler about 2 months ago. The misfires started this week. I have a stethoscope, so I can listen for the injectors. Where are they located?
Volvo Mechanic: eric remington,
 replied 3 months ago

o​n the fuel rail going into the cylinders on intake manifold. two wires going into each injector

Ask Your Own Volvo Question
Customer reply replied 3 months ago
I am still at work, but my son turned the car on and noticed a black liquid coming from the exhaust that smells like gas.
Volvo Mechanic: eric remington,
 replied 3 months ago

ok well listen for those injectors

Ask Your Own Volvo Question
Volvo Mechanic: eric remington,
 replied 3 months ago

DO YOU STILL REQUIRE ASSISTANCE?

Ask Your Own Volvo Question
Volvo Mechanic: eric remington,
 replied 3 months ago

HELLO

Ask Your Own Volvo Question
Volvo Mechanic: Enes, VOLVO Master Technician replied 3 months ago
Enes
Enes, VOLVO Master Technician
Category: Volvo
Satisfied Customers: 5,077
Experience: 18+YEARS WITH VOLVO AS THE MASTER VOLVO MECHANIC&Ase
Verified

what did you replace on exhaust catalytic converter also or just rear muffler ? when you clear codes what comes back

Ask Your Own Volvo Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a volvo mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Enes Your Own Question
Enes
Enes
Enes, VOLVO Master Technician
Category: Volvo
Satisfied Customers: 5,077
5,077 Satisfied Customers
Experience: 18+YEARS WITH VOLVO AS THE MASTER VOLVO MECHANIC&Ase

Enes 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:

The nearest Volvo dealer is 160 miles away. Best $15 bucks I have spent in a long time!

Paul MCorpus Christi, TX

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

< Previous | Next >

Meet the Experts:

Enes

Enes

VOLVO Master Technician

5,077 satisfied customers

18+YEARS WITH VOLVO AS THE MASTER VOLVO MECHANIC&Ase

Andy

Andy

Volvo Expert Technician

3,742 satisfied customers

One of only a handful of ACTUAL Volvo dealership technicians on JA, ASE Master Certified with L1

volvoexpert1

volvoexpert1

ASE Certified Technician

1,001 satisfied customers

Volvo Master Technician with 15 years excusively with Volvos. Also ASE L1certified for over 10 years.

dramey

dramey

ASE Certified Technician

669 satisfied customers

have worked on volvo's for 4 years and am a ase master mechanic. current shop foreman

Chris (aka-Moose)

Chris (aka-Moose)

Technician

574 satisfied customers

16 years of experience

Tim Mohr

Tim Mohr

ASE MASTER TECH

530 satisfied customers

30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

Jim B

Jim B

ASE Certified Technician

504 satisfied customers

40 years Import and domestic AAA Approved Shop owner 30 yrs

< Previous | Next >

Related Volvo Questions
Volvo S60 2.4: , My 2003 s60 just started a p0300 on OBD.
Hello, My 2003 s60 just started a p0300 on OBD. Base line non-turbo. Starts fine, after about 10 seconds it starts to run very rough. Plugs, coils are fine. starts to stall but remains running, I out … read more
Enes
Enes
VOLVO Master Technician
5,077 satisfied customers
Volvo S80 T6: I just bought a 2000 Volvo S80 T6 after about
I just bought a 2000 Volvo S80 T6 after about a week of driving it is idling very rough. I took it to my mechanic and he done a OBD check and codes P0134, P0154, P0032, P0050, and P0300 came back. Not… read more
Enes
Enes
VOLVO Master Technician
5,077 satisfied customers
Volvo S60: I was driving on the highway and it seems to not
I was driving on the highway and it seems to not feed the gas in fast enough. Won't accelerate like normal and is very rough sounding when it is idyling. The check emissions light on the left is on, t… read more
Edward Clayton
Edward Clayton
Associate Degree
1,033 satisfied customers
I have a 1998 Volvo S70 with codeP0172 and P0300,P0302,P0303,P0304,P0305.
I have a 1998 Volvo S70 with codeP0172 and P0300,P0302,P0303,P0304,P0305. Replaced MAF Sensor, used injector cleaner. There is a sensor on rear of air filter housing with 2 vac hose connectors, only b… read more
Enes
Enes
VOLVO Master Technician
5,077 satisfied customers
Volvo XC90 T6: 2003 XC90 T6. Codes prior to spark plug change,
2003 XC90 T6. Codes prior to spark plug change, P0300, P0301, P0304. Post plug change P0300, P0301, P0305, P0154 - all confirmed; P0134 pending; engine rough and may be rougher than before plug change… read more
volvoexpert1
volvoexpert1
ASE Certified Technician
Bachelor's Degree
1,001 satisfied customers
Volvo S80: have a 2006 volvo s80 with a 2.9 that wouldnt start
have a 2006 volvo s80 with a 2.9 that wouldnt start or run. I have the following codes p0300,p032,p0133,p0133, p0030,p0442,p0301,p0302,p0305. I check the fuel pressure and have 52psi. Can anyone tell … read more
Enes
Enes
VOLVO Master Technician
5,077 satisfied customers
Volvo S60 2.4: I have a 2002 s60 2.4 non turbo. I plugged in
I have a 2002 s60 2.4 non turbo. I plugged in my diagnostic tool and it returned a couple codes. The first being p0171(System too lean Bank 1), p0300(Random misfire detected), p0442(Small leak in Evap… read more
Edward Clayton
Edward Clayton
Associate Degree
1,033 satisfied customers
Volvo V70 GLT: I have a 1998 V70 GLT with 96,000 miles on it.
I have a 1998 V70 GLT with 96,000 miles on it. My problem is that my check engine light won't stay off long enough for my mechanic to get the car to pass a New York State annual inspection. The mechan… read more
Edward Clayton
Edward Clayton
Associate Degree
1,033 satisfied customers
2001 VOLVO V70 WITH CHECK ENGINE LIGHT P1171 P0455 P0172
2001 VOLVO V70 WITH CHECK ENGINE LIGHT P1171 P0455 P0172 P0300 P0302 P0303 P0304 P0301 P0305 Rough at start, cuts off until warmed up. once warmed up runs fine. What is causing this to happen?… read more
Enes
Enes
VOLVO Master Technician
5,077 satisfied customers
volvo: trouble codes..diagnostic..oem..for #4 cyl keeps coming
I am getting the following trouble codes and would like a source for the diagnostic troubleshooting trees, to make a better pinpoint diagnosis and avoid the parts changing routine. Any advise? *******… read more
Philip
Philip
Service Tech
High School or GED
604 satisfied customers
2001 S60 T5. Wouldnt start. Found blown Fuse #11 (Ignition Coils).
2001 S60 T5. Wouldn't start. Found blown Fuse #11 (Ignition Coils). Is there any common section of the wiring harness to inspect or any component such as the coils themselves that commonly cause this … read more
Andy
Andy
Volvo Expert Technician
Vocational, Technical or Trade Scho
3,742 satisfied customers
Volvo S60 T5: *2002 Volvo S60 T5*yesterday my car ran fine.
*2002 Volvo S60 T5*yesterday my car ran fine. this morning, i got to about 65mph & all of a sudden a strong sulfur smell filled the car & my check engine light started to flash. when i stopped @ a lig… read more
Andy
Andy
Volvo Expert Technician
Vocational, Technical or Trade Scho
3,742 satisfied customers
2001 volvo s60 T5: I recently changed the timing belt..ruff..idle
I have a 2001 volvo s60 T5. I recently changed the timing belt and its has a delayed start in which i have to hold the key to start. Once it starts, it has a ruff idle. Ive check the timing twice and … read more
volvoexpert1
volvoexpert1
ASE Certified Technician
Bachelor's Degree
1,001 satisfied customers
2001 Volvo V70 T5: exact same problem..rough idle..smooth..idles rough
I have the exact same problem as the other writer, exactly, amazing: 2001 Volvo V70 T5 - rough idle. Car at idle is smooth for a short period ~10-15 seconds, then it idles rough for about 5-7 seconds.… read more
Brian
Brian
Associate Degree
1,806 satisfied customers
Volvo s60 T5: hesitating..2500 rpm), but also occurs..highway speeds
My volvo s60 T5 is hesitating during acceleration (usually below 2500 rpm), but also occurs if I stomp on the gas at highway speeds (almost 160K), what's wrong now?… read more
hauto
hauto
Operate own repair shop
Bachelor's Degree
1,637 satisfied customers
2007 v50 t5: volvo..ruff idling ruff then check light comes..cylinder
question is , i have a 2007 v50 t5 volvo with 60k miles. Every morning when I start the car (in the garage) It starts ruff idling ruff then check light comes on. I check the codes and is says miss fir… read more
dramey
dramey
ASE Certified Technician
Vocational, Technical or Trade Scho
669 satisfied customers
Timing belt..marks on intake and exhaust gears lined them up to marks
replaced timing belt , waterpump ,tensioner and idler . Installation went well found marks on intake and exhaust gears lined them up to marks in cover marked everything up looked for mark on crank gea… read more
Philip
Philip
Service Tech
High School or GED
604 satisfied customers
wagon: spark plugs, wires rotor and distributor..air filter
I have a 98 V70XC wagon. I have changed the spark plugs, wires rotor and distributor. The air filter is almost new. It still runs rough often, especially after it warms up. I have ODB2 codes P0300, P0… read more
BOBBYSS
BOBBYSS
TECHNICIAN/ADVISOR
Associate Degree
8,343 satisfied customers
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