Questions tagged [odb2]

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Check Engine missing fault code: Missing really or not readable by odb reader?

I recently had a serious engine problem which caused the "check engine" light to go on and the engine can now not even be started. I checked the ODB dtc / fault codes in 2 ways: An undocumented "...
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1answer
51 views

How can I test alternator

The voltage of my car battery is not fixed when AC going to active. In fact, I saw that the voltage dropped when the compressor clutch turns on. I suspect alternator and battery. Now I want to test ...
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1answer
41 views

How can I understand which will my car needs new sparkplugs? by ODB

I have bought an OBD2 Android. I saw many parameters in that. I was confused. But I want to know which will my car needs new sparkplugs? of course by OBD parameters.
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0answers
176 views

Normal load and long term fuel trim operating range for 2008 Toyota Matrix with 129,233 miles?

When accelerating up an on ramp, are 90%+ engine loads and 10.90 long term fuel trim values within normal operating range for 2008 Toyota Matrix with 129,233 miles? Edit: - added full spreadsheet
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1answer
4k views

Mysterious Check Engine Light but no codes

On a recent business trip where I was, unfortunately, driving my wife's 2006 Toyota Camry, the Check Engine Light (CEL) came on after about 90 minutes of driving. I had no tools with me, but stopped ...
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1answer
3k views

Rough idle and 02 sensor voltage drops to zero, cylinder 2 misfire

Vehicle is a 2007 Dodge Nitro R/T with a 4.0L engine. I've had a lot of trouble diagnosing a cylinder 2 misfire and looking for help on next steps. Symptoms After engine is warm, stop and go ...
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1answer
4k views

How can I make my ELM327 OBD-II secure?

My ODB-II (ELM327) device has the default PIN of 1234. Is it possible to change this PIN? And how?
3
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1answer
573 views

Are fuel additives effective for DPF de-clogging

My car (Citroen C3 II) recently got its "DPF clogging" light on. As suggested in the manual, I have driven at lower gear / higher RPM for some time, and the light shut down. However, since I expect to ...
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2answers
4k views

Why does my VW diagnostic codes give “Implausible Signal”?

I asked a question some time ago about a check light, specifically airbag and seatbelt light. I have since then checked the code with a code reader and removed it. Making the car drive without any ...
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2answers
587 views

Can OBD2 devices send car alarm to a smartphone app?

I’m new about cars and would like to know if OBD2 devices like ELM327 are able to send the car alarm to a smartphone app, like Torque or OBD Car Doctor. So, instead of the car alarm making noise, the ...
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1answer
2k views

Seat belt / airbag light ON polo 2013

Hello I have a polo from 2013. I just inherited it from my grandfather, whom has not driven it that much. Most of the time it has been in garage. Only done 28.000 km After I got it a lamp started ...
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2answers
5k views

2003 Honda Accord Crank But no start

I did something really silly last night :( - I have a 03 Accord V6 sedan that I recently changed the transmission. After I hooked up the new tranny etc.. I noticed when I start the car the SRS, (!) ...