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23 votes
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What possible causes for the "check engine" light can I check for myself?

You've come to the right place. There's a lot that you can do on your own. Even if all you end up doing is gathering more information for the mechanic who ends up working on the car, they never mind ...
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16 votes
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Sharp cornering is turning my Service light on for a second

It could be that you are cornering so hard that you're pushing the oil in the sump to one side, away from the pickup pipe. This temporarily means you're oil pump is sucking up air and you are ...
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14 votes

What CAN'T the check engine light tell you?

A Set of Standards for Error Codes I'm sure that someone is going to come up with a much more exhaustive answer, but for a good start, you need to understand that there are MANY different standards ...
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10 votes

why the check engine light on 75 mph speed?

A P2757 DTC is a torque converter clutch solenoid valve issue The valve engages a torque converter at higher speeds to lock your transmission and engine at a 1:1 ratio. This engagement, obviously, ...
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7 votes

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

Does it make the most sense to replace an old car's entire exhaust system all at once? Considering your car is almost 10 years old, having to replace all of the parts in the exhaust system does not ...
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7 votes
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How do I pull error codes from my Kawasaki motorcycle?

How do I pull error codes from my Kawasaki motorcycle? Here are the instructions to pull error codes from your 2001 or later Kawasaki street motorcycle. Step 1 Pull off your seat and near the battery ...
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7 votes

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

I think you may have mistaken a service interval indicator for a check engine light. Modern cars will ask to be serviced at regular intervals, even if no fault exists. There indicators can usually be ...
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7 votes

My BMW 325xi smells like gas

The fact that you can smell fuel in the exhaust is a strong indication that the engine is running rich. This means that there is more fuel than required by the engine. There are many things which ...
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7 votes
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Meaning of dashboard "Check Engine Light" on motorbike

That's the check engine light, or CEL - if it lights up, you have a problem with the engine and should stop and investigate it. If it's blinking, count the number of flashes, as this will indicate a ...
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6 votes
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Does waiting until the gas cap become faulty cause any damage?

I was able to find the exact verbiage on Amazon for a Toyota gas cap. It implies that you will get a CEL (check engine light) and you could, which could cost you money to get it checked out. Here is ...
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6 votes
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Why does the check engine light have a pulley on top?

Maybe its a stylised 1950's era air-filter pancake on a carburettor throat? source Icons tend to be retained long after the thing they were based on has changed substantially
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5 votes
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Replacing Cam Position Sensor; any gotchas?

Camshaft position sensors are usually Hall sensors, which translate changes in magnetic field to changes in voltage. As far as proximity is concerned, this should be taken care of by the shape and ...
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5 votes
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OBD-II reader has power but shows nothing

Turns out this particular issue wasn't due to me running the car out of battery (I believe) but actually to a blown fuse. I guess I had previously left the OBD II plugged in for awhile and apparently ...
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5 votes
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Why does the Check Engine code for emissions failure disable traction control and cruise?

Because it's dangerous with erroneous data This is actually very smart on Subaru's part. I have to give them credit. If you have sensors that are faulting you could be giving an ECE false or ...
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5 votes

2001 Ford Explorer High Idle

The P1506 code is an idle air control overspeed error. From autocodes.com: The P1506 code means that the engine idle is out of factory specification. Sometimes the Idle Air Control (IAC) may have ...
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5 votes

Is the vehicle code gone or does a mechanic have to clear it?

If you're worried about the car passing emissions testing, seeing the check engine light go off is a good sign. Where I live, you can't be failed because the light used to be on. The status of the ...
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4 votes
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How do I retrieve the check engine codes without a scanner for a 1999 Dodge Ram Van 3500?

The diagnostic systems in cars get upgraded every few years. It wasn't until the early 2000's that car manufacturers really started to integrate ways of displaying diagnostic info without an OBD ...
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4 votes

P0442: Faulty EVAP System

The OBD2 code P0442 means that on your system you have a small air/vacuum leak. Apart from the seal on the gas gap, you must check the purge valve and the fuel tank pressure sensor are both working ...
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4 votes
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How to fix P1167 in a 2001 Honda Accord, with a F23A4 engine

The Air/Fuel Ratio (A/F) sensor 1 is installed in the exhaust system and detects oxygen content in the exhaust gas. The A/F sensor transmits output voltage to the Engine Control Module (ECM). A heater ...
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4 votes

99 honda civic motor issues

It sounds to me like you mechanic friends are correct. From your description, the car was driven too long on low oil and is now suffering the effects. If you have topped the oil off and are still ...
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4 votes

What CAN'T the check engine light tell you?

The check engine light comes on for issues that the ECU can detect from its many sensors. The ECU controls fuel and spark. This means the ECU will not come on for mechanical issues that cannot be ...
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  • 8,403
4 votes

Does the checkengine light clear itself on it's own or require manual clearning?

If the condition that caused it to come on is a minor fault, and stops occurring, then yes, it will clear itself. If the condition indicates a larger problem, then it will stay on until cleared ...
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4 votes

Read error codes without scanner on Pontiac G6

As this article points out, the ability to blink codes was available with older OBD-I vehicles. Once the OBD-II standard hit, the ability to "blink" out codes was lost. This changeover to ODB-II ...
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4 votes
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revving sounds and the engine cut

Those symptoms could well be caused by an air leak allowing unmetered air into the engine. This would cause a weak mixture when driving which could explain the lack of power and the cutting out. It ...
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4 votes

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

There are scanners that will talk to OBD1 computers, but most shops (I would guess) don't have the equipment anymore. I got rid of my OBD1 equipment last year. I've seen ≤ 2 cars that required me to ...
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  • 10.7k
4 votes

Can mixing octanes cause the check engine light to come on?

Using a higher octane fuel should not have caused the SES light to turn on. The only fill-up-related thing I can think of which would cause the SES to turn on is if there is a bad batch of fuel (...
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4 votes
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Hyundai Tucson dash lights

The engine oil stayed on because it indicates low oil pressure, theres no oil pressure until the engine is running. The battery light stayed on because it indicates the alternator isn't charging. It ...
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4 votes
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P2646 after Head Gasket Replacement....WRONG or NO OIL?

A straight answer to Did they use the wrong oil causing this to happen??? No. The wrong oil wouldn't, at leas not 10W30 instead of 5W20 would make no noticeable difference in 30 minutes. Maybe ...
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4 votes
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Mysterious Check Engine Light but no codes

The CEL can be triggered for a number of reasons, depending on what the manufacturer wanted. Only some of those reasons are emissions-related. Everything in the OBDII code list is, in some way, ...
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3 votes

How to fix P1167 in a 2001 Honda Accord, with a F23A4 engine

This is assuming you don't have access to a scantool that can communicate with a Honda ECM and without bidirectional controls. Key On Engine Running (this may work Key On Engine off) disconnect the ...
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