An acronym for "Check Engine Light"

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2answers
1k views

What possible causes for the “check engine” light can I check for myself?

The "Service Engine Soon" light came on yesterday and isn't going away on its own. The car drives fine, no weird noises, smells, or other symptoms. The manual is not very helpful, just directing me to ...
19
votes
3answers
656 views

What are good features to look for in an OBD-II reader

I recently took my car in for the engine light. It turned out to be a minor problem (crack in gas cap let water in). It would be nice to have a low-cost OBD-II reader to be able to find out for ...
15
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2answers
12k views

Why would a new gas cap cause the “check engine” light to shut off?

This happened to a friend of mine: The "check engine" light came on in his truck (Toyota). He replaced the gas cap and the light shut off. Then I also had a "check engine" light come on in my 1994 ...
13
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2answers
269 views

Does waiting until the gas cap become faulty cause any damage?

The description for a fuel tank cap says: You can prevent unnecessary service costs by replacing the gas cap on modern vehicles before they go bad and the check engine light appears. Is this ...
12
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2answers
14k views

2005 Dodge Ram: Easy way to diagnose code P0420?

My truck is reporting a code P0420, which apparently is "Catalyst System Efficiency Below Threshold (Bank 1)" which can either be the catalytic converter or the rear O2 sensor. The code came on at ...
11
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3answers
70k views

Check Engine code P0420 Catalyst efficiency below threshold bank 1

After months of normal driving with no problems, my 2003 Honda Civic EX check engine light came on during a long trip. Got it scanned and it's P0420: Catalyst efficiency below threshold bank 1. They ...
9
votes
1answer
113 views

Why does the Check Engine code for emissions failure disable traction control and cruise?

I have a 2010 Forester with nearly 100k miles, and it just started giving the "emissions" check engine code (P0420, Catalytic Converter Efficiency Below Threshold). When that code is tripped in the ...
8
votes
1answer
752 views

Sharp cornering is turning my Service light on for a second

Citroen C4 2005, Petrol Very rarely I happen to turn without braking properly and my forward momentum is quite high. In these situations I can feel the strain on my front wheels being very high. What ...
8
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3answers
65 views

My BMW 325xi smells like gas

It is difficult to start my BMW it runs rough and smells like raw gas from the exhaust pipe. My check engine light is on. What could be the problem? I just had the engine replaced I am over 8,000 ...
8
votes
1answer
6k views

Does it make the most sense to replace an old car's entire exhaust system all at once?

Back story: The Check Engine light came on in my 2005 Chevrolet Malibu LS Sedan (V6 3.5L). I took the car to a mechanic #1 (M1), an independent shop. They replaced the EGR valve. A day later, the ...
6
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2answers
233 views

What CAN'T the check engine light tell you?

Usually when something goes wrong with my vehicle the check engine light comes on. I had an issue recently where the check engine light did not turn on, but the vehicle ceased functioning. I read the ...
6
votes
4answers
4k views

If the check engine light goes off after some time later, has the issue been resolved?

My '08 Ford Fusion's check engine light went on about a month ago. It was a P0455 code "Evaporative emission control system leak detected - large leak". I was going to fix it myself, but never got ...
6
votes
3answers
50k views

How serious is the Engine System Service Required message on a Volvo V50 2007?

I got a 2007 Volvo V50 last week and the "Engine System Service Required" message has appeared. how serious is that message and can only a Volvo garage do the diagnostics? It has done 41000 miles. I ...
6
votes
1answer
31k views

'Check Engine' code P0171 System Too Lean - Is it safe to drive?

My 2003 Toyota Corolla's Check Engine Light came on. I read the codes using an OBD code reader and got P0171 - System Too Lean (Bank 1) and P0133 - 02 Circuit Slow Response (Bank 1, Sensor 1). The ...
5
votes
4answers
14k views

My battery was too low, and now my check engine light is on

I've noticed it in the last year (2013) that my 2008 Jetta with the original OEM battery would be taking a little longer to start than before, sometimes (but very rarely) not starting in the amount of ...
5
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2answers
4k views

Where exactly is the Check Engine Light connector on a 1997 Honda Honda Civic?

The check engine light on my 1997 Honda Civic lit up. I came across a method for troubleshooting (http://honda-tech.com/showthread.php?t=1901557) but I'm having trouble finding the connector. Can ...
5
votes
1answer
83 views

How do I pull error codes from my Kawasaki motorcycle?

I have an FI light on my Kawasaki motorcycle that is 2002 or newer. How do I get the error codes so I can troubleshoot it?
5
votes
1answer
62 views

No Acceleration, loss of power, backfiring, CEL, stalling

91 Caprice - l am having problems on acceleration, loss of power, backfiring, check engine light, stalling. Had to repair shop three times and they have not fixed it. Is there a scanner that can ...
5
votes
1answer
48 views

revving sounds and the engine cut

I have a 2002 Subaru Forester. My engine light came on a couple of days ago and I was planning on bringing my car in to have it checked out. This evening as I was driving I felt like the car would ...
5
votes
2answers
321 views

Why is my Chevy 2008 Cobalt not acting as though it's getting enough fuel and reading “cylinder 4 misfire?”

I have a Chevrolet 2008 Cobalt (LS) that I've had for about 7 years. No sooner do I have this thing payed off, when it starts giving me the following problem (I've never had any trouble with it ...
5
votes
1answer
257 views

Knock sensor ground and dieletric grease

The knock sensor for my 2001 Subaru Outback grounds through the engine block. I've seen various advice about whether to put dielectric grease on the underside (where the grounding takes place). Some ...
5
votes
0answers
120 views

SAAB 9-5 wagon throws P1549 Code (Boost control valve)

I called an ASE-certified mechanic. He charged some $60 for the visit and $60 diagnosis and really he didn't quite spot on anything. Left me where I was - work-wise , diagnosis-wise and knowledge-...
4
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1answer
648 views

Meaning of dashboard “Check Engine Light” on motorbike

Please help me understand the meaning of this dashboard light shown in the picture. ABOUT BIKE SPECIFICATION What happen if it blinks RED ?
4
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2answers
293 views

Replacing Cam Position Sensor; any gotchas?

I have a 2007 Nissan Murano. My Check Engine light is telling me that the cam position sensor (bank 1) is bad. I've located the sensors, and they are both readily available and easy to get to. Is ...
4
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2answers
54 views

Does P0420 on a Vibe result from a pre- or a post- O2 sensor?

My CEL is on and the code reads P0420 on a 2003 Vibe. There are apparently three options: Pre-cat O2 sensor Post-cat O2 sensor CAT model 51274 This is most likely beyond my mechanical abilities (...
4
votes
1answer
105 views

OBD-II reader has power but shows nothing

My check engine light is on, the car ran out of battery and after jumping it, it is running kind of poorly, idling rough, etc. I plugged in the OBD-II scanner/reader, and it "has power" (green ...
4
votes
2answers
4k views

P0442: Faulty EVAP System

After seeing my CEL come on in my '05 Mazda 3 (just passed 100K mi.), I used my code reader to find out that the code was P0442. So I naturally came to this website to see what I could find on the ...
4
votes
1answer
896 views

O2 Sensor Error after replacing spark plugs?

Ford Taurus 2004 Sedan SES DOHC. (The car is actually in the shop right now and I told him to hold off until I get more info.) Took the car to the local shop to get the spark plugs replaced. Because ...
4
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3answers
3k views

2004 Jetta - Secondary Air Injection System Incorrect

My check engine light came on and I took it to the parts store to get the computer read. The error that came up is Secondary Air Injection System Incorrect. and the probable causes listed were: ...
4
votes
1answer
455 views

CEL code 43 on 1992 Civic

I'm getting CEL code 43 after doing a lot of work on my car (changing the head gasket, which involved removing and reattaching lots of exhaust and intake components, and replacing the fuel filter and ...
4
votes
1answer
3k views

How do I retrieve the check engine codes without a scanner for a 1999 Dodge Ram Van 3500?

I'm sure the answer to this applies to many models of Dodge and probably Chrysler, Jeep, and Plymouth, too. I found the answer for newer (2001 Ram truck) vehicles but nothing I've found works on my ...
4
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3answers
39k views

How do I resolve error code P1135 in my Toyota Camry?

I recently replaced the downstream O2 sensor in my Toyota Camry. Shortly thereafter, the check engine like came on again providing the following codes: P1135 which I understand to be the upstream ...
4
votes
1answer
423 views

Difference between steady and flashing CEL?

What is the significance of a flashing CEL, vs. a steady one? I recently read and cleared the codes on my 1996 Lincoln Mark VIII. After driving it for awhile, the CEL came back on. During that trip,...
4
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2answers
2k views

Can an ELM327 OBD-II reader report on anything other than engine trouble codes for a Mini Cooper?

My car (Mini Cooper S) has a service light and tire pressure light on, so I was expecting my new OBD reader to tell me what they were about, but it just says "0 confirmed emissions-related DTCs ...
4
votes
2answers
40 views

Does a CEL always result in an OBDII DTC?

Will any error which causes the check engine light to go on show up as a DTC during a regular OBDII scan? This is obviously only in relation to OBDII compliant vehicles. EDIT July 26th, 2016 So I ...
4
votes
1answer
980 views

'00 Volvo S40 Idle surging

The idle surges when in neutral and park, but there is no noticeable surge in gear or reverse. The car has an automatic transmission, if that makes a difference. I have to this point replaced the ...
4
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0answers
22 views

2000 Mercury Marquis Check Engine Light Issue

I have a 2000 Mercury Marquis. When the temps were -20+ I went out and started the car often letting it run at 20 minute intervals. On the last day of the cold spell the check engine light stayed on. ...
4
votes
4answers
1k views

Honda Civic 2000 DX, Check Engine Light Becomes On but Does Not Give OBD Code

On my Honda Civic DX 2000, the Check Engine Light (CEL) has been on for a while, so I brought the car to AutoZone to have the OBD code read, but I was told that no code is stored in the computer. ...
3
votes
2answers
8k views

Key cycling to determine cause of check engine light

The check engine light is on in my 1989 Ford E250 Econoline van. I heard from a mechanic (who changed my oil) that there's a "key cycling" process that will cause the light to flash in a certain ...
3
votes
3answers
4k views

Do the Check Engine and Oil Pressure lights have any significance when the engine is off?

I should preface this by saying that I'm a relatively brand new driver, and I know next to nothing about cars. I've got a 2005 Chrysler Sebring, and I've noticed just today that when I put the ...
3
votes
1answer
4k views

What does error code: POO13 mean?

My vehicle: Saturn VUE 2008, 2WD 4Cylider. Checking light is steady on. Read code at auto zone store, POO13. The mileage is only 45K. I have no idea. Thanks for advice.
3
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3answers
2k views

Will a universal catalytic converter set off the check engine light on an Infiniti G35?

I have a 2004 Infiniti G35 and the bank 2 catalytic converter has triggered the check engine light. If I replace it with a universal Magnaflow catalytic converter (approximately $100) will the check ...
3
votes
1answer
1k views

Cause of P0440 on 1999 Subaru Legacy Outback

I get a P0440 code on my Outback on almost every highway trip over 5 miles. Is this caused by the leak in the gas tank or could it be something else?
3
votes
1answer
42 views

1996 Toyota Avalon How to remove a dashboard?

So I came to America for two months and quickly realised that everyone drives. So, since I hadn't budgeted for a car I bought a cheap 1996 Toyota Avalon. Trouble is, my naivety led me to buy a car ...
3
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1answer
53 views

What computer does a Toyota Corolla use?

I have a 2000 Toyota Corolla. I took it to AutoZone because my check engine light was on, and they plugged in some electronic thing that read the problems. What computer / electronic system is keeping ...
3
votes
1answer
22 views

2000 Honda Accord O2 Heater error

After replacing the O2 sensor due to fault codes 1166 and 1167, I still get 1167-Heater circuit error. I check resistance through O2 sensor heat, about 17 Ohms. Plug has 14 volts feeding heater. I ...
3
votes
2answers
5k views

2000 Camry P0446 Evaporative Emission Control System Vent Control Circuit Malfunction

I have a 2000 Camry with 86,000 mi the check-engine light came on 4 days ago. It has come on intermittently in the past and then shut off itself. This time it hasn't gone away. A Code reader shows ...
3
votes
3answers
12k views

what would cause the no.1 sparkplug to foul out 10 minutes after replacing it on a 1997 Buick 3.8 v-6 engine

About 6 months ago, I had some preventative maintenance done on my car that included oil change, plugs and wires. Within a week of running out of gas my car began "stumble" and idle rough. I ran ...
3
votes
1answer
3k views

CEL 12, 21, and 55 on '94 Jeep Grand Cherokee

So, I've pulled the codes from my car based on the helpful information provided here: Check Engine Light on '94 Jeep Grand Cherokee Now, I need just a little help understanding what the codes ...
3
votes
1answer
185 views

Check engine light 2005 Toyota Camry

I am getting a P1135 code on my 2005 Toyota Camry.I have replaced the A/F sensor first with a Bosch then with a Denso. I am still getting the same trouble code almost immediately after starting the ...