How can the check engine light codes on a 2004 Mazda3?

Yes I can use an OBDII scanner, but that’s not what I mean. Other cars can check their engine codes by counting the number of blinks of the check engine light after a specific key on/off cycle.
Can Mazdas do this? More specifically the Mazda3?

How can I tell what my engine light is on for?

My 1990 Honda CRX DX’s stock engine was swapped out for the D16Y7 engine. The engine light is on. My 2000 Civic’s engine light was on so I took it into Schucks and they gave me that engine light reader that you plug into another plug under the steering wheel near the fuse box down [...]

How to Save Money and Energy with Energy Efficient Light Bulbs

Quickly cut your electric bills and reduce your environmental footprint with energy efficient light bulbs. Confused by the different types of Energy Saving Bulbs? CFLs? LEDs? Halogens? The U.s. Government has ruled that traditional light bulbs must go.
How to Save Money and Energy with Energy Efficient Light Bulbs

Why is my check engine light on and the engine sputters on a 97 powerstroke?

Check engine light is on and the engine sputters like it is not getting enough fuel. What could be wrong?

Check engine light on, received a diagnostic check and I am unsure what results mean?

The check engine light came on in our 2001 Toyota Highlander
We took it to AutoZone and had them check it and the gave us these results:
1.Defective or Loose Fuel Cap (not this one, checked it)
2.EVAP canister or hose cracked/not connected
3.Purge or vent solenoid defective
4.Vacuum leak at engine
How serious are these thing?
Can we check them ourselves?
Any [...]

I changed both O2 sensors and my check engine light was not on. Why is it shifting better and has more get up?

It seemed a little sluggish and was shifting poor for an automatic transmission. I changed both of the O2 sensors and WOW what a huge improvement. Should I also do the same with the MAF sensor??

How many sensors are on a 1998 Toyota Avalon. I’ve had two replaced so far and the check engine light is back

The car is running great and I just got a brand new starter and a brand new battery so I think its just another sensor but I’d like to know how many my car typically has before I rush it to the mechanic all worried about some big expensive engine problem.

Gas vapor leak in my NEW car causing engine service light to come on. Where could it be leaking gas vapor?

(2010 Ford Focus–400 miles)The dealer does not think it is the gas cap, as he has checked this, but says it maybe coming from somewhere else. He says the vapor leak causes the engine light to come on….and gas vapor can be smelled near the gas cap vicinity, without opening the cap– after it has [...]

I just replaced the inlet and outlet o2 sensors on a 2004 pt cruiser and the check engine light still stays on?

When I personally changed the o2 sensors, I still get the same error code that the o2 sensors are bad, but they are brand new and the check engine light stays on. I even tried to remove the battery terminals and then put them back on to reset and still nothing. What do [...]

My 99 honda civic ex needed to 2 o2 sensors to get that annoying engine light off. I replaced them with 2?

universal o2 sensors but that damn engine light still didn’t go away. What could be the problem now? I’m about to take a bat to this damn car. It’s pissing me off.

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