error codes

99 Maxda Protege, 5 speed, one owner, well maintained, 230K miles, and starts easily, runs fine, and consistently gets 30-35 MPG, minor fender bender (radiator, sheet metal, & head light), but the CEL appears intermittently with the P0421 code when I drive it gently. Otherwise. it's fine! The...

Hello, I own a 2019 Mazda CX-5 2.2 184 ADW automatic. My engine warning light has unfortunately come on. There's no loss of power. My battery is slightly low (that might be related). I have a friend with a diagnostic tool. The error code displayed is "P2426 Particulate Matter Sensor...

My 2013 Mazda5 won't connect to any of the 3 different code readers we tried. There doesn't appear to be any blown fuses. Any further suggestions would be appreciated.

1999 Mazda Protoge DX 1.6L has 150k miles replaced the head 2 years ago and its ran like this since, it only does it between cold and up to temp, when its cold its fine and when its up to temp its fine, it has 150psi of compression on all 4 cylinders, I'm stumped check engine light codes are...

Good evening everyone, I own a 2020 Mazda2 Skyactiv-G 90 Mild Hybrid Evolve. There aren’t many of them around in my area, so as soon as I saw the first opportunity and listing, I immediately bought it from a private seller. The car had—and still has—a problem related to the brake/light switch...

Had ABS/Trac Control lights on my 13 Lincoln MKX 6and needed a tool that was able to read those codes. Purchased the Topdon artdiag 600S tool from Amazon. When shopping, I wanted a tool that was reasonably priced, able to read ABS/brake system codes and do the E-brake retraction and reset for...

Well CX-5 wouldn't start this morning, lots of messages flashing on the screen including low fuel. I jumped it with a portable starter and while it was running I looked at the fuel gauge and it said there was only a range of 44 kilometers. I didn't use the car yesterday and I could swear I...

Hello, My 2014 Mazda5 recently threw a P013B code (randomly). According to information I found online, this is the upper O2 sensor getting old. This is supposed to be intermittent, then it would become frequent, then would need replacement. I'm planning to replace it right now, given that most...

P0421 code was triggered today while driving. It corresponds to Warm Up Catalyst Efficiency Below Threshold. Within FORScan, its Status mentions "Test Not Complete". Is there a chance the PCM just needs to run through more tests and it might close out the engine light, or not likely? It's...

I am looking for help to resolve an intermittent P2187 diagnostic code issue (system too lean at idle bank 1) for a 2008 Mazda 5 (2.3L Touring) with ~120k miles. The idle is not rough or unstable, there is no difficulty starting the engine, there is no fuel smell, no whistling or hissing noises...

So my 2019 Mazda CX-5 Grand touring decided to show me the codes below today 11/29/2025. It showed up on the infotainer center under the settings. Also on the instrument panel there is a light that is a triangle with an exclamation point in it. I have cleaned the windshield and the sensor eyes...

I have a 2011 Mazda3S with a 2.5L engine and I'm experiencing some strange behavior with the speedometer. When I start the car, the speedometer needle jerks, and the electric locks activate, as if the car is already moving when it is actually stationary. I’ve attached a photo for reference...

Hi guys I have 2016 cx5 with p0304. It goes to limp mode with ac on and under load. Me and my mechanic replaced injector-resistance tested, coil, plug, checked wiring, did walnut blasting valves, checked compression, even swapped ECU..still same problem. Getting desperate. Does anyone have any...

When they weather is cold, my 2020 CX-9 dashboard displays: "Front Radar Sensor System Malfunction" and "Smart Brake System Malfunction". Yet if I drive my 2020 CX-9 on a warm part of the day those 2 messages do not display. I have an oil change scheduled at a Mazda dealership in a week. I...

The wife’s 24’ CX5 2.5NA was throwing this code today. I do know that there is a TSB for this, it’s just going to be a matter of how long it’ll take for them to actually do it! Her coolant tank shows right on the “L” mark. When I remove the cap in order to try and top it off, there’s still...

Have had my check engine light going on and off for over a month now. It started around the time we got the recall notice for the thermostat, but my engine code was P0014 and it originally was the only code being thrown. Trouble was that I work from home and only really drive long...

I have a 2009 Mazda6 2.5l and I'm trying to get rid of the engine light. Scan code shows wiring fault and catalytic converter inefficient, have replaced both o2 cat sensors, cleared code then next day engine light came on again...Any ideas on where to next? Thanks!

I have a 2017 Mazda 6 which recently starting throwing a 3 errors. The errors are: 1) Battery management system malfunction 2) Smart brake system malfunction 3) Front Radar Sensor system malfunction First thing I thought of when seeing those 3 errors was must be a failing battery. A quick...

Hello, what is fault code U053B (83-48)? What is the common resolution? Many thanks! Humbert

I bought a Mazda3 2021 from an auction in the USA. I have an issue with the car. The dash light doesn't come on just the security indicator light is blinking the key can unlock the car and there are lights in other areas of the car like the radio the ac the roof. The car won't even crank. We...