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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6k views

Calculate boost from MAP Sensor via OBD-II

I'm working on a little project where I want to calculate the boost pressure (in bar) which my turbo currently produces. I use a wifi OBD reader that I plug into my car. I saw mobile apps calculating ...
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108 views

CAN-BUS only reading one repeating frame

I'm trying to read the CAN-BUS via the OBD port with a PiCAN, it works fine for one of our cars. But for the other (a 2007 Mini One) I'm just getting the same frame repeated until the bus is ...
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2k views

What is the drive cycle for OBD-II equipped GM vehicles?

As the title states, what do I have to do to get through the drive cycle for OBD-II equipped GM vehicles?
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868 views

Maruti Suzuki Swift Check Engine Light On And Engine Coolant Temperature Needle stay at 'C'

My Swift VXI has developed a condition. I have started to see the check-engine light on and the Engine Coolant Temperature Needle stays at 'C' after starting the engine. Engine gives a growling sound. ...
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2answers
226 views

Which OBD II adapter to buy?

I am thinking of purchasing an OBD-II adapter, that I can pair with my android phone. I would like to be able to use it on different cars. Is it advisable to go for something like the PLX Kiwi, which ...
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1answer
3k views

Error Message from OBD-II (7F 01 11)

I have been extracting OBD-II DATA from UART board (ELM327) on my TOYOTA INNOVA. It responded correctly few weeks before and gave all supported sensor values. But now, for every response, ECU responds ...
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20 views

Data captured when an error code is generated

I have a 2015 Ram 1500 that has just over 60,000 miles (107000 km). They did a diagnostics and there are several transmission error codes. Is the mileage tracked when the error code is captured. ...
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34 views

GMC VLOM replacement necesssary

I replaced the head on a 2012 gmc 5.3 vortec. Now getting codes of 3401,3425,3443 & 3449. Being told it is always necessary to replace VLOM when doing this kind of work. Is that true?
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36 views

How to control/turn on dash board lights (ex. engine light) and alarms (ex. open door alarm, car alarm, etc.) with OBD II port?

Wondering how I would be able to send signals to my car (ford focus 2014) in order to turn on and control lights on the dash and various alarms in the car such as the open door alarm and car alarm. ...
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1answer
99 views

OBD2 port construction, Toyota Camry 95, and Dodge Durango 2002

I have a product that takes an OBD 2 plug for power and I don't want to use my standard OBD port. I need to create an OBD 2 port for power purposes only, how could I do this and does the port run at ...
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86 views

Problem diagnostic on Toyota Estima

In relation to my previous question: Hybrid battery not charging fully This morning I took the vehicle to the mechanic who has serviced all of my cars for the last 10 years. He called me later in ...
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126 views

Engine warning light P2191 / Hyundai Veloster problem starting when cold

on monday I had some issues starting the car and then an engine warning light with the code P2191. I clear the error but it appeared again. This is the starting sequence values of o2 and other: https:/...
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2answers
147 views

OBDII Code P0348: Camshaft Position Sensor A

Last night, the check engine light went on on my 2006 Toyota Tacoma with 152K miles. When I got home, I plugged in my OBDII code reader and got Does this mean I just need to replace one of my ...
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467 views

P0340 code, even after camshaft sensor replacement [Solved]

I drive a 2004 Honda Civic ex coupe manual with ABS, engine code D17A2 (SOHC, Vtec) I was driving my car and slowly revved up to 7krpm (smart, I realize) and suddenly my car lost power until 3500rpm ...
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2answers
177 views

OBD2 device that connects over cellular data?

I'm looking to monitor any and all stats of my vehicle. Are there any OBD devices that connect remotely over cellular data, and come with a nice phone app? I'd like to be able to monitor the car from ...
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89 views

Bluetooth OBD-ii hardwire question

I am looking to hardwire in a bluetooth OBD-II scanner into my car (2013 Subaru Impreza WRX) so that I can display gauges on my phone with Torque Pro. My car has a CAN-H and CAN-L in the radio ...
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591 views

Where I can find Specific PIDs list for Hyundai Motor and Mitsubishi Motor? [closed]

I am looking for specific PIDs for Hyundai and Mitsubishi vehicles. Can you tell where I can find Specific PIDs list for Hyundai Motor and Mitsubishi Motor?
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62 views

Which wire to cut from OBD2 connector to prevent theft of a Mini Cooper S?

Just bought a Mini Cooper S convertible 2013 and read about the way thieves steal cars nowadays: by copying the key via the OBD2 connector. There are several (expensive) solutions for this out there, ...
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86 views

Mapping VW DTCs from a scantool to the raw data obtained

I scanned a VW Golf TDI 2015 using a scantool (at a workshop) and it gave the following 2 codes - Engine module: P0103 - Mass Air Flow (MAF) (G70): Signal too High Instrument cluster module: ...
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16 views

OBD GPS device stopped working?

I own an Indian version i20 and plugged in an OBD device (zyme pro) to track the car. It worked great for 2 days however i went to motor shop for seat covers and reverse camera and suddenly the GPS ...
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2answers
177 views

Isuzu D-max 3.0 2009 port OBDII

I'm not a mechanic or anything, but I'm too curious. I live in Colombia and I have a vehicle that is marketed here as Chevrolet Isuzu D-max 3.0 model 2009 (diesel engine) I know that my vehicle has ...
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1answer
101 views

How difficult is it to collect obd commands ?Will it be different for different brands?

OBD is something very interesting I found these days.Thanks to this repo https://github.com/pires/obd-java-api & wikipedia which provides the basic information of PIDs.But there is a lot of ...
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47 views

After querying RPM and fuel, OBDII is lighting all my dashboard lights

I'm using OBDII and after querying the rpm and the fuel, all the light in my dash board is lighting. How do I need to query the car? Why might this have happened?
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31 views

2001 Nissan Xterra drivability

2001 Nissan Xterra SE, 3.3L V6, automatic, 2WD, towing package, 150k miles Some history, perhaps useful: I bought this vehicle from a friend a few months ago. Vehicle was in good shape for its age. ...
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180 views

Proton Jumbuck ECU code retention

Anyone know if it's possible to clear fault codes from a Jumbuck's (my brother's) ECU by disconnecting the battery and if so, how long it needs to be off power. We've found 2 codes for the O2 sensors, ...
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1answer
124 views

Which value should takes to show Gauge value, Fuel pressure or Intake Manifold Pressure?

Currently, I'm working on an app which should show Gauge value (inHg) of the vehicle using OBD reader. Which values should I use to show the Gauge? Is there any formula?
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190 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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71 views

Truck fleet monitoring project

I need to design a truck fleet monitoring system and make a prototype of it during my traineeship this year. I've been looking into the different buse networks that are already implemented in trucks ...
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115 views

Android OBD2 Fuel

Currently I'm developing an Android app that uses an OBD2 ELM327 device to read some data from the car, so I could use it in my application. Now, when I want to read the fuel, fuel consumption or ...
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402 views

Cars with single fuel type how retrieve tank level to dashboard?

I see that BiFuel cars had fuel level and type readable from ECU by using pid 0151 and 012F. Cars with monofuel don't have this pids sensors, so how the dashboard retrive the fuel level? Maybe the ...
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429 views

Does limiting the number of PIDs on an OBDII Live Scan increase the sampling rate?

I was messing around with the live scan settings on my BlueDriver OBDII scanner and I checked another PID box and got this message: To provide the best quality of data, we recommend logging no more ...
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249 views

Reverse engineer a scan tool to display what commands it sends [closed]

I came across this video: youtube.com/watch?v=VtMvccqE8ks Any idea/resources how to build this setup? I am not much interested in monitoring the CAN bus for commands (headers or CAN IDs) of power ...
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102 views

adapter for ODB2 device

i have a car: "fiat punto street 2016". I just bought a device from ebay that can give me some informations and errors status, the problems is that the device has an interface OBD2 and it's ...
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862 views

Calculate Intake Manifold Absolute Pressure from MAF Engine using OBD Data

I need to calculate Intake Manifold Absolute Pressure from OBD Data. I have Toyota Corolla GLI 2010 Model. This car has MAF engine which does not return Intake Manifold Absolute Pressure. Where'as I ...
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303 views

Difference between black and blue eml327 diagnostic tool

I've recently bought an Alfa Romeo 147 1.6TS 2001 105hp(77kw), and the previous owner had an instrument, or gauge, or mileage table replaced along with electrical window and mirror button table on ...
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630 views

Door Monitoring Through OBD-II Bus

I have a Ford Fiesta Style (05) and was wondering if it would be possible to determine the status of the doors of the vehicle through the OBD-II bus? In particular I want to know whether or not the ...
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1answer
693 views

Honda Accord Maintenance Minder accidental reset/ what to do now?

I changed the oil on my 2015 Honda Accord LX myself for the first time. Following a YouTube video, I reset the Maintenance Minder. The problem is that I didn't note the extra codes that show up on the ...
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3k views

OBD-II Enhanced PIDs

I was looking at the Torque Pro app and in the section where there is a list of custom PIDs that can be used, one is a Transmission Temperature PID. But it is exactly same as Engine Coolant ...
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0answers
143 views

Do any generic OBD tools provide re-keying OBD Key? [closed]

It seems the rekeying mechanisms use OBD II. Here is an example of one. Do any generic OBD II Diagnostic and Key Code Clearing tools support this rekeying functionality via OBD Key? Preferably one ...
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1answer
2k views

Shift Solenoid Value causing misfires?

I have a 2003 Acura TL-S. I started it today (seemed fine yesterday) and it ran really rough. I also hand a weird burning smell. I attached my OBD2 reader, and got the following data: P0300 - ...
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1answer
806 views

VAG TP 2.0 complete list of AT commands

I am trying to find DTCs from various ECUs in a Skoda Rapid 2009 model. I am using OBDLink SX (elm 327 chip) and Putty (similar to HyperTerminal) https://jazdw.net/tp20 This link gives the list of ...
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1answer
2k views

Calculate car battery life using OBD parameters

I want to calculate the battery life of a car based upon OBD2 parameters like engine load, distance traveled, Control Module voltage etc. Can anyone please guide me as to how to do this? If ...
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42 views

Is it possible to clear “permanent codes” on a Volkswagen Jetta?

I was inspecting a 2011 Volkswagen Jetta today and saw on my OBD reader that it had two misfire codes, if I remember correctly P0302 cylinder 2 misfire and P0300 multiple cylinder misfire. The check ...
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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?
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278 views

Where can i find official scientific documents with table of PIDs for ECU

I need an official document for reading information from PIDs that manage comunication with ECU of car. I'm searching to sae.org and iso.org but i don't find nothing. Can someone guide me?
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6k views

How can I calculate MPG using an OBD-II Device

OBD-II provide following readings Mass Air Flow (PID 0166) Fuel–Air commanded equivalence ratio (0144) Can these be used to calculate the actual fuel consumed? Is the output correct?
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32 views

Can we know Brake pedal pressure from generic ELM 327 BLE OBD dongle? [closed]

It would be great help if someone can help me to learn how to measure brake pedal pressure from ELM 327 ?
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3answers
74 views

Compiled list of OBD-II protocols used by various vehicles

Has anyone compiled list of OBD-II protocols (physical layers) used by various vehicles? they're required to be J2534 compatible but what about manufacturer specific pins? is it even common for ...
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70 views

Electricity not working when car is off

2015 Honda Accord Replaced the battery in my wife's car. After replacing the battery, it seems as though none of these things work when the car is off - Headlights, Dome light, Power locks, key fob (...
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94 views

ODB key pairing tools allow for easy theft - technical necessity or manufacturing decision

My 2014 Landrover Discovery 4 was stolen when they picked the lock and paired a new key with it using the ODB port. As it is keyless start, that is all they needed to drive it away. I still have both ...

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