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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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 ...
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2answers
7k 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 ...
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2answers
64 views

Can I Connect dashcam Blackvue DR900S on OBDII connector in Volvo XC70 2015?

Do I get 12V on OBDII pin 16 without ignition ON?
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1answer
284 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 ...
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1answer
9k 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
905 views

Will the check engine light come back on if I erase the code using OBD2?

My check-engine light came on. I have a 2003 Ford Ranger 4.0L. I'm new to using the OBD tool. So I used the tool and was very happy to get the result so easily. It is P0456, which means a very small ...
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2answers
621 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 ...
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1answer
4k 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 ...
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2answers
927 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 ...
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1answer
1k 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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878 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 ...
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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 ...
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1answer
1k 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 ...
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1answer
907 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)) /...
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1answer
118 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 ...
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1answer
9k 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 ...
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3answers
3k 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
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3answers
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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 ...
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1answer
53 views

Obd scanner requirements

My 1998 vw Jetta just died in my garage. Does it have to be running while using a obd scanner or will the electrical system still show the fault codes? Thank you
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1answer
6k views

P0380 OBD-II Trouble Code: Glow Plug/Heater Circuit “A”

I found the following error in the error log of my Ford Focus Tunier 1.6 tcdi diesel 109HP (2006): P0380 OBD-II Trouble Code: Glow Plug/Heater Circuit “A” First i thought it was due to a defect ...
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1answer
34 views

Is there a reason to monitor calculated (not measured) OBDII mode $01 catalyst temperature values?

My assumption is that on a 2 bank system, if both catalyst always read the exact same temperature, the values are calculated or inferred from other sensor inputs. My guinea pig is a 2005 Ford ...
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1answer
220 views

My 2008 Miata only has 3,600 miles on it but failed the smog test

2 OBDII monitors (evap system, and EGR and/or VVT system) have not yet finished self-checks, apparently because the battery was replaced. The smog station says I need to drive the car about 75 miles ...
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2answers
998 views

Are OBD-II PID codes the same for all car manufacturers?

In the Wikipedia PID list we can see that 0x0C for engine RPM, 0x0D vehicle speed, etc. Is this same for all car manufacturers? In Arduino examples we can see that data[2] reserves the PID (for ...
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1answer
2k views

Which is the Best Scan and Diagnostic tool for Asian Vehicles? [closed]

I am looking for a Scanner and Diagnostic tool that will be used for Asian Vehicles. I am not sure which scanner to buy which works with Asian makes like Toyota, Hyundai, Kia, Mahendra, Suzuki and ...
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1answer
7k views

Getting MIL on a Dodge Grand Caravan 2012 without an OBD device

I have a dodge grand caravan 2012 and yesterday, the check engine light went on. I know there's usually a way to get the error codes without an OBD device... I was able to do this on my old caravan ...
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1answer
2k views

How to add a new transponder / key to a Daihatsu immobiliser

How can I add a new key to a Daihatsu immobiliser? The key I have has a Texas 4C transponder, and is used in the Daihatsu Copen and Daihatsu YRV (to name just two).
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1answer
2k views

Reading CAN messages through UART to OBD-II Board and MATLAB Toolbox

I want to read/write CAN messages. I have MATLAB in my laptop which has a Vehicle Network Toolbox which supports reading/writing CAN messages. I have my hardware OBD-II to UART board, FTDI and OBD-ii ...
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2answers
2k views

Volkswagen Golf MKV Fault log

I have a folkswagen Golf MKV 2005 model, i used torque to check what the yellow motor sign means, and this is what i received: P2201 - Powertrain NOx Sensor Circuit Range/Performance bank1 P2096 - ...
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1answer
940 views

OBD2 protocol in trucks

How can I check if these trucks are OBD2 compatibile? Trucks: Mercedes Atego, type 818 [Daimler 970.21] Man, type 8.113 If they are compatible with this protocol can you tell me where can I find ...
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1answer
47 views

OBD-II Scanning Bluetooth | Are Fault Codes Encripted?

I bought JDiag Fastlink OBD II scanner which is based on ELM327 based OBD II scanners. I noticed that the scanner was able to read all the instrument panel reading such as fuel level, engine ...
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1answer
80 views

Using a device with external power and receive data from the CAN bus

I want to keep a device in always on situation in the car. I do not want the device to drain the car battery. The car is used at least once in two days and the current consumption of my device is ...
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1answer
83 views

To run a new ODB-II line from car computer

I bought a used Toyota Camry 2010 sometime in August. I noticed that there is no OBD-II port in the car. I have checked everywhere in the driver side and even passenger side. I noticed the car was ...
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1answer
976 views

Flashing O/D (OverDrive) light — Where is the code?

I'm working on a 2007 Ford Mustang. The O/D light is flashing and the transmission has some rough shift transitions. When I use OBDII to read the codes, there are no faults found, no faults in ...
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1answer
156 views

Weird OBD2 error on newer Honda models

We are using an OBD device (https://freematics.com/products/freematics-one-plus/) for some research work. We tested on several cars like Honda 2006, Subaru 2018, VW Golf 2013, Mercedes GLK 2017, etc. ...
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1answer
205 views

Pending overheating related OBD codes disappear before becoming stored?

If my car has overheating/coolant problems, but no check engine light, is it possible that there are pending codes which haven't became stored yet because I keep refilling the coolant before the ...
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2answers
194 views

How can I analyze my Acura TL's response to low octane gasoline?

My six-cylinder 2008 Acura TL specifies "premium" fuel. My wife often fills it with "regular" (i.e., 87 octane). As I understand it, under certain operating conditions and loads, the lower-octane ...
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1answer
1k views

Dodge Durango Transmission Temperature via OBD2

How can I read the transmission temperature on my 2012 Dodge Durango 5.7L Hemi via OBD2 (a wifi adapter - using Torque for Android and DashCommand for iOS)?
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2answers
1k views

BMW E90: Professional Radio (Alpine CD73) USB Adapter won't work

I bought an USB Adapter which emulates a CD Charger. The port wasn't used yet. When I plugged my battery the Radio worked, but I couldn't find the CD charger /USB in my radio source menu. Do I have to ...
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1answer
77 views

Expose Car Hardware information

I am looking for way via which i can access my car information when it is running like speed,acceleration,gear information,oil information,etc . My Car details : Hyundai Verma : Model 2006 , Manual ...
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1answer
142 views

Detect engine stumble or hesitation

I want to know if I can detect my engine is having hesitation/stumble problem from an OBD. I mean not from any fault codes, but from the parameters obtained from the OBD. e.g. calculate the obtained ...
2
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1answer
65 views

ODB2 Fuel Level 2004 Chrysler Town & Country

I am wondering if anyone knows if a 2004 Chrysler Town & Country supports Fuel Level over ODB2. I have been unable to find a list of which vehicles do/don't support this. Thanks.
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1answer
4k views

Error MIL: off Spark ignition

I checked my OBD2 sensor and it shows on DTC that message. Along with P0171 system too lean on my Mazda 3. I put in an injen intake and that was 3 years ago. The check engine light came on 3 months ...
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1answer
316 views

what does the highend OBD2 scanner offer?

I just want to clear some misconceptions that i have about the obd2 scanning tools : Is the difference between the high/low-end scanners is the software only? Do the highend use more connection wires ...
2
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1answer
532 views

Scanning CANBUS [duplicate]

I am in search for a method of scanning the CAN on my car using a cheap ELM327 chip. I can query the ECU (made by Denso) without issue, however when I attempt to set the ELM327 scanner into ...
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1answer
795 views

CAN-BUS in a SEAT cordoba 99'

Does anyone know if SEAT cordoba (99' model) has CAN-BUS interface? Where can one find this kind of info? Thanks!
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1answer
1k views

OBD/OBD2 port on a 1993 mitsubishi triton MJ

Does anyone know if there is an ODB2 diagnostics port on a 1993 Mitsubishi Triton MJ 4x4 Ute?
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0answers
172 views

Engine jerks at certain RPM - Misfire & fuel system over pressure [P000F, P0302]

My Audi A5 1.8t has started having some hiccups after an engine job (Changed valves, timing chain & camshaft intake side) The car starts fine, it sounds fine, but it has the following problems: ...
2
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1answer
149 views

How does a typical OBD communication start?

I'm trying to understand how, at the level of SID (Service Identifier) ​​and PID (Parameter Identifier), a communication must start between an external scan tool and any vehicle ECU (Electronic ...
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0answers
829 views

Can an OBD2 device be used to limit vehicle speed?

Is it possible? And if so, which OBD2 device can do it?
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0answers
1k views

OBD request trouble code mode 3 and mode 7

I'm trying to get my own app on phone to read Trouble code in car... I see that i have 3 mode to do this... first is to use the mode 01 with command 01 (but this command is generic) or the mode 03 and ...

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