Questions tagged [obd-ii]

On-Board Diagnostics-II (OBD-II). Questions usually involve scan tools, their use and their compatibility, as well as how to interpret Diagnostic Trouble Codes (DTCs).

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3
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1answer
312 views

Does obd scanner remove check engine light only or doers it also removes unfixed codes from memory?

If you use an obd reader to to delete the check engine light for a problem which hasnt been fixed, the check engine light will eventually come back on. My question is, regarding the code that is on ...
3
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1answer
162 views

Is OBD-II a universal standard?

I'm following this guide: http://www.instructables.com/id/How-to-fix-your-check-engine-light/?ALLSTEPS According to this website an OBD-II reader will work with my 53 Vauxall Zafira, but I want to be ...
3
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1answer
13k views

Cleaning the gas cap to rule out that tightness is the cause of the “check engine” light

The gas cap on my 2003 Pontiac Vibe used to make a slight sound of "pssstt..", the sound of some air either entering or exiting from the tank as I was opening the cap. Two months ago, the gas cap ...
3
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2answers
3k views

Catalytic converter readiness monitor never sets

I Reset the computer in my 1998 Chevy Astro, but even after driving around for a few days and putting it through the GM drive cycle, the OBDII reader is saying that the CAT monitor is not ready. I ...
3
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1answer
3k views

can elm327 (bluetooth,wifi) adapters read and clear airbag(srs) codes?

There are a lot of bluetooth and wifi obd adapters but only a handful of them(e.g blurdriver) claim that they can read and clear abs and srs codes, so I'm wondering whether a cheap elm327 based ...
3
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1answer
1k views

Calculate vehicle range using OBD-II data

Is there a way that I can calculate the current range of a vehicle, using data provided via OBD-II? I know I can find out the fuel percentage using fuelLevelInput, but how can I find out how many ...
3
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2answers
15k views

Does disconnecting the battery reset on-board memory?

Will disconnecting my car battery reset the on-board memory or do I have to manually erase it to remove error codes? I ask because I have a faulty electrical system that throws gas leak errors and I ...
3
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1answer
1k views

Auto door lock does not work with automatic transmission shifting to and from “Park”

My Toyota Corolla 2014 Altis auto door lock has not been worked. I read Electric central door lock does not work with automatic transmission shifting to and from “Park” and also Toyota Corolla ...
3
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1answer
386 views

My 2005 Honda Accord with OBD codes: 0507 and 0011. Howto Troubleshoot

The check engine light came on very recently with two error codes being thrown. From this source, the following will cause 0507 P0507 HONDA - Idle Control System RPM Higher Than Expected A vacuum ...
3
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3answers
7k views

Live scan tool for OBD 1.5 GM transitional?

1995 S-10 Blazer 4.3L Vortec V6 (vin W) with Powertrain Control Module (PCM) 1995 was the OBD transitional year for GM. The PCM itself is OBDI, but the interface connector has the 16-pin D-style ...
3
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1answer
2k views

Read OBD-II Signals Matlab (in real time)

I would like to decode the data obd-ii directly by Matlab (read data directly from reader obd-ii and decimal display in real time.) Should I create a Matlab interface or there is a direct method (...
3
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1answer
871 views

Can I easily replace the Throttle Position Sensor on a 1999 Maxima?

My '99 Maxima's Check Engine light came on recently. I whipped out my OBD-II reader, and pulled off two codes. P0325 (Knock Sensor) and P1705 (TPS) Reading online it appears the knock sensor ...
3
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1answer
3k views

Is it possible to check ABS, ESP and Airbag data from obd port?

I'm developing an app that read data from car via OBD port. I'm not expert with this port and i would like to know which type of data i can read from this port. For sure i can read speed, rpm, ...
3
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1answer
512 views

Mode 01 PID 01 OBD-II

https://en.wikipedia.org/wiki/OBD-II_PIDs#Mode_1_PID_01 Mode 01 PID 01 - Monitor status since DTCs cleared. In the 1st chart, B7 is 'Reserved' and must be 0. But for a few cars (like Skoda Rapid) ...
3
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1answer
968 views

How to calculate Car “Distance Till Empty” without knowing the fuel level

I've Renault Duster RxZ. I would like to calculate the DTE(Distance till Empty) which is based on the "how much fuel the car has" and the "mileage of the car" ? Currently the OBD doesn't return ...
3
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1answer
1k views

How can one calculate volumetric efficiency without a MAF sensor?

I am completely new in the field of OBD2 sensor; I am looking for a method (or a formula) to calculate Volumetric Efficiency of: Diesel Car Petrol Car which do not have a MAF sensor. Can anyone help ...
3
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1answer
7k views

Citroen Ignition coil problem (P0350 code)

I have a Citroen C4 1.6 petrol (2006) and the other day while I was driving the engine light came on with a message "Depollution system faulty". I connected the OBD-II to my computer to get the error ...
3
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0answers
137 views

Nagging P0430 (and now a pending P0420 too!) 2004 Lexus ES330

I've got a 2004 ES330 (2nd owner) with roughly 315,000. We didn't pay much for the car in 2012 with 164,000 miles. So, i've never gone overboard in maintenance of it. A year ago, when it was time for ...
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0answers
1k views

BMW CAN bus data format

https://www.reddit.com/r/CANBus/comments/39pzpp/bmw_3series_2015_odometer_reading/ I am using the above website as reference and sending commands to engine ECU. I have a log from BMW engine ECU (below)...
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0answers
123 views

Need to read OBD-II steering angle PID on 2009 Toyota Camry [duplicate]

My graduation project is about developing the car side mirror. And for that purpose I need some data from my 2009 Toyota Camry. I have searched for the PID's (parameter ID's) for some sensors, but I ...
3
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0answers
49 views

Less than specified bytes of data from OBD

0100 (https://en.wikipedia.org/wiki/OBD-II_PIDs#Mode_1_PID_00) should provide 4 bytes of data. But there has been cases, like Audi A4 2.0 TDI, where the data from 0100 was less than 4 bytes. So is the ...
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0answers
894 views

P0420 Catalyst efficiency below threshold bank 1 With CO emission only!

I saw this code in OBD2 scanner on Skoda Fabia 1.2 2006 64hk petrol. It doesn't matter to me except that the car failed the inspection and I'm not allowed to drive it any more. The problem was too ...
3
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0answers
285 views

Why do I get weird-looking fuel trims when connecting the OBD Fusion app to a 2009 LR3?

Preamble I was looking at a 2009 Land Rover LR3 over the weekend with the OBD Fusion app. The vehicle had no CEL issues; this was more about thoroughly inspecting a prospective purchase. I can't ...
3
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0answers
230 views

Mazda 3/Axela RVM light when OBD2 adapter connected

I have connected a OBD2 adapter (Bluetooth ELM327) to my 2010 Mazda Axela (1990cc) and I've noticed that when my phone is connected to the adapter, the Mazda RVM alert lights on the side mirrors come ...
3
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0answers
339 views

2005 Impala OBD2 not working right

I have a 2005 Chevrolet Impala (Base trim, 3.4L) and I recently purchased a cheap OBD2 Bluetooth reader. Unfortunately, Torque (Android app) isn't able to read data from this transmitter when ...
3
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0answers
3k views

Ford Focus 2008 Error code: P2585-61

I own a Ford Focus 2008 1.6 TDCI. Recently I filled the DPF Additive tank with EOLYS Fluid but I couldn't regenerate and reset the values that day, so I drove to my home. Following day, I went to ...
3
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0answers
539 views

Mahindra KUV 100 and Suzuki Alto OBD protocol

Can someone please tell me the OBD-II protocol of Mahindra KUV 100 (diesel) and Suzuki Alto (diesel). Also whether ELM 327 Bluetooth will work? http://www.ebay.in/itm/SuperMini-ELM-327-Bluetooth-v2-...
3
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0answers
2k views

Mercedes Atego OBD2 live data codes [closed]

I have tried to connect an OBDII ELM327 adapter in Mercedes Atego. Somehow I managed to get it in that OBD2 connector. I can see that my adapter is receiving electricity. These are the PID's that I ...
2
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3answers
827 views

Oil pressure and fuel pressure formula

Can someone give me a formula to calculate Oil and Fuel pressure of a car engine? Consider a small passenger car. I have information like Total distance travelled, speed, rpm, MAF, MAP, Intake Air ...
2
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3answers
600 views

Wheel alignment from OBD parameters

Can I calculate wheel alignment from OBD parameters. Car is Hyundai i10, and it doesn't give any Steering Alignment/ Steering Position data. The only method to check the alignment is to let the car ...
2
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1answer
173 views

CO, NOx, HC plot with AFR Table [closed]

Can someone provide me with a lookup table (reliable of course), or a plot (with exact plot to scale) for CO, NOx, HC emission from a SI engine? If possible, I am also looking for the same with for ...
2
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1answer
807 views

Determining active gear from OBD2 for Ford Fiesta

I am trying to to write an app which advises the driver to change gears and do some other driving quality assessments. For this purpose I need to determine the RPM and currently active gear in a ...
2
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2answers
2k views

Formula to calculate emission rates

OBD tells whether I have passed the emission test or not. I want to know the formula by which it calculates the rate of CO, NOx, HC emission from my car and compares it with some set threshold value ...
2
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2answers
5k views

Interpreting ABS/DSC fault code

I have an ABS, DSC and handbrake warning light (the latter telling me it's likely from one of the rear wheels) on my BMW E46 320d from 2001. The warning used to be intermittent (it would go away, then ...
2
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2answers
5k views

Accessing Diagnostic Trouble Codes (DTCs) in car

I want to know how can I access DTCs by writing a code and parsing it? I have RaspberryPi and related hardware for communication with the OBD-II of car. I will generate manual faults and then after ...
2
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1answer
70 views

Could the OBD2 connector be used to switch gears?

What the title says, could I use an OBD2 code to control gear shifts in an automatic car? For example send an OBD2 code via a microcomputer like the Raspberry Pi. The car in question is a 2008 BMW e60 ...
2
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1answer
5k views

Read error codes without scanner on Pontiac G6

I've read certain vehicles may begin flashing their check engine light if one bridges the diagnostic plug correctly with some wire before starting the vehicle. How does one do this for a Pontiac G6? I'...
2
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2answers
39 views

Battery died a few months ago. Since then catalytic converter smog test not passed

I have an old 2000 Camry car that died in storage and so I replaced the battery 4 months ago. That reset all the monitors. Since bringing it back up it also had a check engine light which required me ...
2
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1answer
110 views

VW Golf Mk7 TSI Electronic Stabilty Control (ESC) error light on

I have a VW Golf Mk7 TSI Comfortline 1.4. My ESC error light is on, though I've had no recent work done on the car. I have taken the battery out and sent the car to a super service technician who ...
2
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2answers
182 views

Can 2 devices plugged in obd port cause problem?

I'm newbye in this area, so I apologize in advance if I will ask something stupid. Shortly, I'm writing a software on top of connected cars that means that we are going to decorate and package data ...
2
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1answer
463 views

Where is OBD port location

Where is the OBD II port on a Honda Civic 2012 located? A picture would be good. Thanks.
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2answers
4k views

Volvo S40: Identify cause of alarm triggering

2005 Volvo S40 with about 100k kms. Every once in a while, usually after I've just parked the car, exited, and locked it, the alarm will go off. I understand there is a common issue with these ...
2
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2answers
780 views

Emission performance of a vehicle using OBD

The California Air Resource Board uses OBD scanner for emission testing. (https://www.arb.ca.gov/msprog/obdprog/obdprog.htm) In other places like India, 'tail pipe exhaust gas analyse' method is ...
2
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1answer
2k views

Interpreting O2 sensor readings

I have a 2001 Honda Prelude SH (Honda H22A4 Engine). The exhaust has two oxygen sensors; one before the catalytic converter (sensor 1) and one after (sensor 2). Holding at 2500 RPM and sitting still ...
2
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1answer
953 views

Detect AC(on/off) and Window(open/close) of CAR using OBD

Is there any way to detect AC(air conditioner) and Window(open/close) using OBD? I am putting links below for the OBD reader but I am unable to find any way to detect the AC(air conditioner) and ...
2
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1answer
832 views

Calculate tyre pressure of a car from OBD parameters

I want to calculate the tyre pressure of a car from OBD parameters. I don't want to take TPMS or any custom PID for this. One of the indirect method is the calculate: ((w_LF + w_RR) - (w_RF + w_LR)) /...
2
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1answer
110 views

Do car manufacturers provide specific make/model/year information for each diagnostic-trouble-code?

Recently my car's check-engine light came on, I used a car OBDII port code reader to get the diagnostic-trouble-code (DTC) and then I googled what the DTC meant. I noticed that lots of the websites ...
2
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1answer
8k views

OBD2 to USB Cable for Windows 10

One could put an argument that this question is about software and not mechanics, however now-days everything is computerized (including cars and their diagnostic tools) so I believe this question ...
2
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3answers
2k views

What OBD II protocol does the 2004 Ford Explorer use?

Does the 2004 Explorer use J1850 or some other protocol? Is there a way to extract codes by jumpering pins on the OBD connector? Thanks
2
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3answers
17k views

My ELM327 OBD-II adapter is not responding anymore to its original bluetooth PIN (1234). Is it possible to recover access to it?

I recently bought an ELM327 adapter from China and was very satisfied with it. It was working fine with Torque and other OBDII apps for Android, and I could always pair with it using 1234 as the ...