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Related Mitsubishi Questions
Check engine light. code p0420. Comes on and off. 2003
Check engine light. code p0420 JA: Does the light stay on, or does it blink? Customer: comes on and off JA: What is the model/year of your Mitsubishi? Customer: 2003 Lancer oz JA: Are you fixing your … read more
Greg
Greg
Shop owner, technician
Vocational, Technical or Trade Scho
7,036 satisfied customers
My lancer has been having poor power. I can't get above
hi pearl. my lancer has been having poor power. I can't get above 55-60mph on highway. It seems to accelerate fine from start but quickly loses acceleration as i go above 20mph. it will chug if i pres… read more
Gunvir Singh
Gunvir Singh
1,949 satisfied customers
I have a lancer 2003, i have a p0421 p0135 i change bank 1
i have a p0421 p0135 i change bank 1 sensor oxigen i yust ut a new 1 … read more
Peter Bagley
Peter Bagley
master technition
Vocational, Technical or Trade School
2,010 satisfied customers
My smog test failed. P0421- catalyst 1 efficiency below
my smog test failed. P0421- catalyst 1 efficiency below threshold bank 1. … read more
Ron Z.
Ron Z.
Vocational, Technical or Trade Scho
22,716 satisfied customers
Mitsubishi Eclipse GT: I received a P0421 error. I have changed
I received a P0421 error. I have changed all 4 sensors and reset the code, however, the service engine light continues to burn bright and when I check the code, it is the same one for the sensors that… read more
Eric
Eric
Retired
N/A
42,585 satisfied customers
I have a 2006 Lancer and this code came up when trying to get
I have a 2006 Lancer and this code came up when trying to get my car inspected. (It was bought in Florida - no inspections there and now live in NY) The first repair shop I took it to told me I needed… read more
Doug
Doug
ASE Certified Technician
Vocational, Technical or Trade Scho
8,677 satisfied customers
Mitsubishi Mirage LS: Hi there, My 2001 Mitsubishi Mirage
Hi there, My 2001 Mitsubishi Mirage 1.8, 2 door Coupe, recently had a P0421 code and two weeks later, it now has a P0401 Code. Is the P0421 and P0401 code related in the sense that if the catalalytic … read more
Doug
Doug
ASE Certified Technician
Vocational, Technical or Trade Scho
8,677 satisfied customers
Mitsubishi Lancer GTS: I own a 2008 Lancer GTS (ja3au86u68u023089)
I own a 2008 Lancer GTS (ja3au86u68u023089) and it has failed emissions. The trouble codes were p0421 & p0441. I took it to the dealer and they wanted approx. $1600 to replace the purge valve & cataly… read more
Doug
Doug
ASE Certified Technician
Vocational, Technical or Trade Scho
8,677 satisfied customers
Mitsubishi Galant ES: Iam getting p0421 on my 1999 galant
I'am getting p0421 on my 1999 galant which have 108000 miles. Check status of monitors and all say ready. The o2 sensors have never been changed as far I know. The car is running fine and there are no… read more
Eric
Eric
Retired
N/A
42,585 satisfied customers
Mitsubishi Galant: High! Just purchased a 2001 mitsibishi
High! Just purchased a 2001 mitsibishi galant 4 cyl with 180,000 mi on it. I had it smog tested at a "test only"station and it failed on the OBD II diagnostic test portion. It passed the emissions & v… read more
HondaPlatinum
HondaPlatinum
Vocational, Technical or Trade School
25,792 satisfied customers
Mitsubishi Lancer Oz Rally: As I was getting on the freeway
As I was getting on the freeway my 2002 Mitsubishi Lancer Oz-rally automatic jerked as I accelerated. I'm not sure what the problem is.… read more
Greg
Greg
Shop owner, technician
Vocational, Technical or Trade Scho
7,036 satisfied customers
Mitsubishi Eclipse GT: My Nephew had a private mechanic diagnose
My Nephew had a private mechanic diagnose his "check engine light" and he found “check engine code P0421” which he took to the Dealer who ordered and installed a catalytic converter. After driving the… read more
Doug
Doug
ASE Certified Technician
Vocational, Technical or Trade Scho
8,677 satisfied customers
lancer oz rally: 2 days later engine light comes on and spits..recall
just purchased a 2005 mitsu lancer oz rally. of course 2 days later engine light comes on and spits out a p0421 code. internet research indicates a pcm reflash recall. My question is considering a cat… read more
Eric
Eric
Retired
N/A
42,585 satisfied customers
Endeavor: Check engine light..heater..Catalytic Converter..$1500
I have a 04 Mits Endeavor with 230000 miles (I know can't believe it either) Check engine light - code was BANK 1 Sensor 1 heater Bank 1 Converter.....Shop says need to replace Catalytic Converter but… read more
Eric
Eric
Retired
N/A
42,585 satisfied customers
lancer: at smog checked the p0421 code turned up....any ideas
i own a 2002 mits lancer, at smog checked the P0421 code turned up....any ideas what this means?… read more
Amedee
Amedee
Automotive Consultant
Vocational, Technical or Trade Scho
22,470 satisfied customers
2006 mitsubishi lancer es: my check engine light came on
OK I have a 2006 mitsubishi lancer es 2.0L. About 6 months ago my check engine light came on. I took it in and they said the Cat was bad. I had it replaced. Everything was fine until the other day the… read more
Doug
Doug
ASE Certified Technician
Vocational, Technical or Trade Scho
8,677 satisfied customers
Check engine light came on when I was..Misfire..cylinder
Check engine light came on when I was out of town daughter continued to drive. Three codes came up Misfire in cylinder 3, P0421 and P0421PD. Changed the plugs erased the code and at 30 Miles took it b… read more
Doug
Doug
ASE Certified Technician
Vocational, Technical or Trade Scho
8,677 satisfied customers
Mitsubishi eclipse gs: the converter..check engine light..autozone
I have an 01 mitsubishi eclipse gs and as you know the original headers are welded with the converter. Well i just bought a new header called spyder but they do not have the converter welded on. Well … read more
Doug
Doug
ASE Certified Technician
Vocational, Technical or Trade Scho
8,677 satisfied customers
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Meet the Experts:

Doug

Doug

ASE Certified Technician

8,677 satisfied customers

Mitsubishi employed and Factory trained ASE certified technician

Chris (aka- Moose)

Chris (aka- Moose)

Technician

373 satisfied customers

24 years of experience diagnosing & repairing

George H.

George H.

ASE Certified Technician

321 satisfied customers

ASE Master tech 15+ years

Tim Mohr

Tim Mohr

ase master

18,144 satisfied customers

30 yrs foriegn and domestic, gas and diesel

Don - Mo Lurch

Don - Mo Lurch

Mitsubishi Mechanic

60 satisfied customers

16 years, Line Mechanic, Electronics trouble shooting, etc

AMD

AMD

Master Technician

48 satisfied customers

L1 Advanced Level Diagnostics Specialist

BigBob

BigBob

Service manager/Technician

46 satisfied customers

25 years in the auto repair business

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