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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2
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0answers
23 views

Unable to connect OBD2 scan tool

Cheerz, I have purchased recently OBD2 scan tool(Autel MaxiScan MS300) which supports ISO9141. My car (Mitsubishi Lancer GLX 1.3 1999) seems like ODB2 compatible using ISO9141-2 protocol for ...
3
votes
3answers
1k views

Can OBD-II be used to control the vehicle?

Is the OBD-II port in vehicles only used for reading diagnostic codes or is there some functionality that allows the vehicle (eg. engine revving) to be controlled through OBD-II? Thanks.
3
votes
1answer
47 views

VW Golf IV Possible Engine Misfire

I guess I better start with a few details on the car in question: VW Golf IV 20 valve V5 petrol engine (2.3L) ~80k miles on the clock Now the problem, it feels to me as if the car is down on ...
3
votes
0answers
128 views

Calculating MPG from MAP sensor (or converting MAP data to MAF data)

My 2002 Honda Accord V6 has a Manifold Absolute Pressure sensor (MAP). I understand that this sensor gives out information in pressure units (psi or equivalent). After doing a bit of research, I ...
1
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1answer
30 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 ...
2
votes
1answer
2k views

What does error code: POO13 mean?

My vehicle: Saturn VUE 2008, 2WD 4Cylider. Checking light is steady on. Read code at auto zone store, POO13. The mileage is only 45K. I have no idea. Thanks for advice.
1
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1answer
111 views

Read steering angle data in real time

I need to read vehicle steering angle (front wheel angle) data in real time for a research project that I am involved in. How can I achieve that? What HW and SW do I need for it? So far I can think ...
2
votes
2answers
1k 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 ...
1
vote
1answer
47 views

Read vehicle speed data in real time

I need to read vehicle speed (velocity) data in real time for my research project. How can I achieve that? What HW and SW do I need for it? I guess it can be read from CAN bus via OBD2 interface? I ...
3
votes
2answers
323 views

Writing CAN Messages

I want to know what should I write with the CAN ID to send it to ECU. I am using ELM327 and Raspberry Pi with all connections to OBD-ii. initially for sending general PIDs to the ECU through ELM327 ...
6
votes
1answer
77 views

ODIS 5.0.6 diagnostic tool : how can I remove an option from a transformed vehicle?

We have a transformed car, a Bentley, which no longer has a motorized sunroof. The blind has also gone. However the car diagnostics exhibits a fault on the related, non-present devices and motors. We ...
4
votes
2answers
41 views

Replacing Cam Position Sensor; any gotchas?

I have a 2007 Nissan Murano. My Check Engine light is telling me that the cam position sensor (bank 1) is bad. I've located the sensors, and they are both readily available and easy to get to. Is ...
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1answer
52 views

How to extract data from ODBII?

I bought a EvZ Mini Interface Works on Android Torque Bluetooth Obd2/obdii Car Diagnostic Scanner (Mini), a PWOW® WIFI Wireless OBD2, OBDII Car Auto Diagnostic Scanner Adapter Reader, ELM327 for ...
4
votes
3answers
8k views

OBD-II reader/scan tool that can also diagnose air bag light

Is there an OBD-II reader/scan tool that can also diagnose air bag warning light? My 2004 Honda Element EX has a red air bag warning light that recently has turned on. The nearest Honda dealer wants ...
0
votes
1answer
81 views

CAN Bus action list

I have an ELM327 Bluetooth, which I'm linking to ubuntu powered PC. My end goal is to install a raspberry pi into the car and have it automate things like automatically opening the roof and locking ...
10
votes
1answer
1k views

How do I find the correct pins in a CAN-BUS connector?

This question might be too technical for this forum, but I'll give it a go. I have a 2012 BMW R1200R motorcycle with CAN-BUS. I'd like to make an Arduino interface to the connector on the bike, but I ...
4
votes
1answer
1k views

Can I use an OBD2 Scan Tool on older GM vehicle?

I can get an adapter that connects my OBD2 scan tool to my 12 pin GM scan tool connection. But will the tool be able to read the codes and tell me anything useful? Or do I need to get a scan tool that ...
3
votes
3answers
97 views

Failed inspection on because of OBD2 readiness

My 2008 Hyundai failed inspection because the OBD-II system is in a "not ready" state. The mechanic asked if my battery had died recently. It had, after getting an alignment. He suggested driving on ...
1
vote
3answers
2k 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 ...
3
votes
1answer
143 views

Oxygen sensor PID for 2004 Toyota Camry 4-cyl

My 2004 Toyota Camry with 170k miles is pulling a P0420 code, which I've read can be due to a bad catalytic converter or O2 sensors. I have an OBD-II tool with the DashCommand app on my iPhone. ...
3
votes
1answer
1k views

What is the OBD-II drive cycle for a 2003 Toyota Corolla?

This site includes a post with the specific drive cycle that resets the OBD-II monitors on several 2000-2002 Toyota vehicles. What does the drive cycle look like for a 2003 Toyota Corolla?
4
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1answer
78 views

How do I get the most out of a “smart” OBDII scanner?

I recently purchased an OBDII scanner that allows me to read and log data using my tablet. How do I get the most out of this device? I am already familiar with simply reading the trouble codes to ...
2
votes
2answers
2k views

Diagnosing “wrench icon” on 2010 Ford Fusion Hybrid: will OBD2 scanner help me?

On my 2010 Ford Fusion Hybrid, I frequently get the yellow "wrench" icon which appears on the LCD screen to the left of the speedometer. On approximately 25%-50% of the trips I take with the car, the ...
0
votes
1answer
75 views

Where and how to find compatible OBD bluetooth adapter

I need a bluetooth OBD adapter compatible with Hyundai Sonata 2002 2.0 Automatic UK. I don't know much about cars and hence ending up asking for help. I would appreciate if someone can inform me where ...
2
votes
1answer
222 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).
0
votes
2answers
537 views

Torque App Mileage reliability?

I am using an OBD-II sensor and the Andriod Torque app to look at my fuel economy and see that it shows a whopping 37 MPG for my Mazda 6, 2005 (2.3 Automatic). This seems fishy as some random googling ...
2
votes
3answers
630 views

P0420 in a Prius

EDIT #2: I rescanned, looking at the correct data, and found the rear O2 sensor was definitely bouncing up and down with the forward sensor's lambda reading. Since I have looked for leaks and ...
2
votes
0answers
261 views

OBD 2 Fuel reading says No Data

I wanted to read fuel level from the car and display it on my app. I'm using ELM327 bluetooth adapter to communicate with my car. When I'm sending the code "012F\r" to my OBD 2 it says "NO DATA". ...
4
votes
1answer
14k views

'Check Engine' code P0171 System Too Lean - Is it safe to drive?

My 2003 Toyota Corolla's Check Engine Light came on. I read the codes using an OBD code reader and got P0171 - System Too Lean (Bank 1) and P0133 - 02 Circuit Slow Response (Bank 1, Sensor 1). The ...
5
votes
4answers
3k views

Controlling door locks via CAN bus

I'm trying to figure out how to lock and unlock the doors of a 2010 Toyota RAV4 using the CAN bus via the OBD-II port. I have a microcontroller attached via an CAN controller and a CAN receiver, and ...
1
vote
3answers
134 views

Can reading from the ODB port interfere with a custom STO map?

I recently had a full freeflow system fitted to my Opel/Vauxhall Astra Turbo Coupe. Along with this, I had a stage 1 STO map done to take full advantage of the new exhaust characteristics. At any ...
1
vote
1answer
94 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 ...
1
vote
2answers
112 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 ...
2
votes
1answer
1k 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 ...
2
votes
1answer
372 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 ...
6
votes
5answers
960 views

Are there any OBD II converters on the market?

I know there are tons of readers and software on the market, but what I really need is something to convert signals of my1970s sensors (fuel level, speed, coolant temp, etc) to OBD compliant signals. ...
6
votes
1answer
234 views

Does OBD II explicitly or implicitly include forward/reverse information?

From my understanding, OBD II does not directly tell if a car is in forward or reverse gear. I wonder what the best way to derive such information from OBD data if there is any. Following the ...
0
votes
0answers
155 views

Remote Car Climate Controller

I am investigating the possibility of monitoring and controlling the car cabin temperature using GPRS. I will be using Arduino Uno and GSM shield to communicate with an Android App. The arduino works ...
1
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0answers
1k views

Fuel Consumption and other Fuel related data from basic OBD-II parameters

I want to know how can i obtain the values of Fuel Consumption, Fuel Economy and other fuel related information from basic OBD-II parameters like Vehicle Speed, RPM, TPS etc. I have noticed that not ...
0
votes
0answers
176 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 ...
5
votes
2answers
833 views

Why do we need make-specific cables to read car ECUs?

I find it bizarre that the automotive industry has standardized the use of the OBDII protocol, yet most cars require make-specific cables in order to access the complete set of diagnostics and ...
-4
votes
1answer
249 views

using OBD II how can i detect an accident with airbag [closed]

i need help with c++ program, if either the airbag is triggered or the deceleration detected is greater than 5 Gs, we consider that an accident occurred. The vehicle decides to ask nearby by sendig ...
5
votes
2answers
228 views

What is the point of a vacuum pump with a fuel injection engine?

I recently got an OBD-II dongle with the Torque Android app, which allows me to read the computer's output in real time. The app will let me drag and drop different gauges on my screen, which works ...
3
votes
2answers
755 views

Mini Cooper P1638 code

I have a 2007 Mini Cooper. It keeps throwing code P1638 on my code reader on these really really cold mornings, and the engine seems to search for idle, reving betwween 500RPM and 1400RPM. The car ...
9
votes
3answers
465 views

What are good features to look for in an ODB-II reader

I recently took my car in for the engine light. It turned out to be a minor problem (crack in gas cap let water in). It would be nice to have a low-cost ODB-II reader to be able to find out for ...
4
votes
1answer
520 views

How much battery does an obd bluetooth reader suck?

I'm planning on using an obd bluetooth reader on my car and leaving it plugged in to use apps like dash and torque. It's a daily driver so I'm not that scared of depleting the car's battery, but I ...
1
vote
1answer
667 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 ...
5
votes
1answer
200 views

OBD2 and CAN-bus

Do all vehicles with OBD2 have a CAN-bus? Otherwise, what are the alternative buses used? Are there special versions of the buses for trucks and school-buses than for cars/suv/vans?
3
votes
1answer
771 views

Subaru Forester OBD Scan Codes “P0130” and “P0130 P”

My 2002 Forester Check Engine light is on. I connected an Autel MaxiScan MS300 OBD-II scan tool and got indication for two codes. Browsing through the codes, it reads P0130 and P0130 P. The first one ...
1
vote
2answers
46 views

Manually starting MIL(Malfunction Indicactor Light)

I want to know how can i manually start my Malfunction Engine Light (Check Engine Light) ? i actually want to generate a DTC so that i can see it on a OBD Scanner. I know even altering or ...