I had this code p0420 for almost 3 years, but the light goes ON and OFF so somehow i passed the emissions, but now it's getting closer again and don't know what to do. I guess it's a air leak, but any ideas how to find and where to look for a air leak? The other code p0299 i have no idea, it's for my turbo, but the turbo works most of the time and sometimes when i push the gas pedal down the turbo don't works, so i am assuming maybe it's a air leak that is causing this two error.
Thank you !

Hello, just purchased a 2009 volvo s40 with 30600. this car just had 30000 mile routine service with diagnostic at 30300 no issues.never driving a s40 before not sure if this is normal or if its another issue. if it was something serious would it show up on diagnostics. thankyou this is worring me since it is a used car. it is still under warrantee but wanted to be sure it was a problem dealer is one and a half hours awoy. thanks again, Rob

what type of transmission fluid and power steering fluid should i use on my car?
also if im putting in new transmission fluid, should i do a transmission fluid wash, is that nessasery since i dont know what exact oil was used before?

check engine light came on and had it checked and said cylinder 1 and 4 what does that mean

My car battery died. Once I jumped it, it now has a check alarm system notification on the dash. Is there any way to reset that notification? The nearest dealership is over an hour away.

My check engine light is on as well.

I noticed it a few weeks ago. When on the expressway I got to cruise and after a few minutes when when I needed to accelerate again I felt it in the gas pedal. It's getting worse. Now most of the time and the whole car shakes

The mechanic looked at it and could not figure exact cause. He said the transmission seemed fine that it could be a CV axle or a motor mount or transmission mount --but was baffled. They looked at it for 3 hours.

Mechanic took it out said It vibrates on acceleration. Not in neutral.

The vibration is more like a shudder/side to side wiggle.
any ideas?

I recently had an '00 S40 that was involved in crash (my wife is fine, car was totaled). I found another '00 S40...clean!!!! car with 165K miles, original owner (has all service paperwork done by Volvo or import garages), all the options/features. So, we've been communicating back and forth this week (nice lady) and she drops the bombshell on me that it was running rough (I drove it on Sunday for a short while, no problems), so after taking to the import garage, she gets leveled with "It needs a new head gasket and it'll cost $2K to fix". I made her a handshake deal on Sunday for $3200 (no money exchanged/no contract signed), and she said she needs to raise the price $1000 to re-coup her costs....I could meet her halfway at best by offering $3700 after repairs. Is this car worth it or do I need to be concerned about a warped engine? Should I shop it out for her to get a better price, or take a "deal" she could give me by buying it for $2200 (per what she said) and do the repairs myself - what I am looking at as far as time, tools, parts? I'm a novice mechanic, mind you, so I'm not sure what to do. By the way, she did mention that she had been putting coolant in it every so often and that a hose looked weak. Thanks!

Needs headlights, grille, front fenders, front bumper, windshield, passenger side air bag and possibly new radiator. Bought the car for $2200...will it cost more than that to fix it?

my label for park, drive, etc fell into the console. I thought if I removed the boot cover I could get into there.
Or do you know how to remove the console

you can hear it when I turn or go over bumps. straight driving is noise free. how can I diagnose the problem?

when started. no codes(code free). What is wrong? Electrical problem. All fuses good!

I have a lot of non-professional experience so I am not afraid to tackle it unless someone tells me it requires a pro due to certain techincal issues, etc. Thanks

I brought this car from dealer on 6/17/2011. I have 781** miles on it. My check engine light came on 15/17/2011. There was a message to check the gas cap (which I did) and the message disappeared but the light has remained on. Did someone know how long will this "Check Engine" light on?

when I start the car it takes a long time to actually start. It seems like up to a minute, although I did not time the duration. When it starts the motor is a rough idol. I recently replaced my plugs and wires, but this did not change the situation. A mechanic suggested turning the car on and off and on a few times to prime the fuel line, but this hasnt seemed to make a change. When it is running it runs fine on the road and at stop lights it idols smooth.

My 2004.5 Volvo S40 T5 driver's side rear door won't unlock with FOB key or manually. Please help.

so we replaced the Fuel pressure sensor and cleared the code but its the light came back on.. Ive don some research (which is pretty hard to do with these dang volvo's lol) and it could be a clogged fuel line, bad filter, or may need a whole new pump :( any answers or advice for me?! It'd be much appreciated.. ohh and the milage is at 73K I've only had her for a few weeks and the light turned on an hour after I signed the papers :(

I have a left rear brake light out and was wandering the easiest way to fix, i have been told i have to replace the entire assembly

How do I know if the oi is leaking at the turbo? Also how much would it cost to repair this?

I just change my battery and requesting the radio code.

we have lack of power when regualur gas is run and the cooling fan and tewp gauge not working

My son sprayed water to clean off the engine. Car ran rough, waited for it to dry, runs good cruising but wants to cut out only when accelerating. Checked everything for moisture but still happening. Any suggestions? (It has a Turbo)

Within the last 3 weeks, my car will stall as I am sitting at red lights or just idling. It happened once a week for the first 2 weeks now about 4 times in the last week, so more frequent now. What can cause this? I just spent about $2200 in Dec and another $500 in March fixing "known repairs necessary at about the 60K mile mark in Volvos.

Was driving and heard what sounds like pulley or belt noise.Engine light came on,went to auto parts store got trouble code P2187. What could this be and how do i fix it? Is this gonna be expensive? Thanks for your help.

I am thinking about purchasing an 02 S40. Are there any common problems other than water leaking? This is a base model with no sun roof.

when i kick in my turbo it missfires and sputers til it catches up w gas. it runs great otherwise and recently had timing chain replaced. could this be a gas problem ?

The key will not turn, happens alot.

The first thing that happened was that it wouldn't start on the first turn. Then it stalled at a red light - then, I was driving 45 but the car was trying to go 70 - it was like cruise control was on - I had no control of the car. The breaks felt weak. At the same time, my temperature guage was going up to almost the red area and then dropping to the bottom then back up to middle ( normal) - all this was happening within seconds/minutes of each other. The car would calm down and the temp gauge would be normal then, it would accelerate and the guage would react - this went on for 10 miles before I could just park it. The shop replaced the idle air control valve and said it was fixed. I drove it off the lot and with 27 miles it acted the very same way. They have been test driving it for the past week trying to make it 'act up' again but it hasn't done it for them. I will not drive this car until I know the proper part/sensor/module has been replaced! It is too scary and I will have an accident or hit the car in front of me. Can you please help!

My car is due for the NYS inspection and my check engine light came on. I check and the scan code is P0456 Mod$13. What do I need to do to resolve it? Will I be able to pass my inspection if not fixed?

My Check Engine light came on and when I ran the codes with my code reader it shows MAP Sensor P000171. Well I have replaced the MAP Sensor, then both the O2 Sensors on the exhaust, the IAC, plugs and wires. Rest the code and after the second time starting it comes on after about 30 miles. Out of ideas.