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).

Filter by
Sorted by
Tagged with
0
votes
0answers
31 views

Data for car parts and sensors [duplicate]

If a fault code appears in the OBD scanner, how tough is it to map the fault to the part of the car that is causing the problem? Is there any website (or api or mobile app) that has this mapping so ...
9
votes
2answers
994 views

How do I go about troubleshooting DTC codes?

When the check engine light (CEL) comes on, there is usually a diagnostic trouble code (DTC) that can be read from the OBD-II (onboard diagnostic) port on modern codes. How do I go about using the ...
3
votes
2answers
395 views

How can I troubleshoot a U0208 DTC code on a 2009 Land Rover LR2? [closed]

How can I troubleshoot a code U0208 on a 2009 Land Rover LR2? It has a 3.2L engine. Thanks!
6
votes
2answers
788 views

How can I access the output of my backup camera?

My 2016 Subaru Forester has a backup camera. First I've ever had, and very neat. Of course, it engages the screen when I put the car in reverse, and shuts off in other gears. I've been reading about ...
3
votes
2answers
17k 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 ...
6
votes
1answer
3k views

Incomplete Catalytic Converter Monitor on otherwise flawless old Tacoma

I have a 2000 Toyota Tacoma with 250k miles on it that runs like a champ. But, after some repairs, the catalytic converter monitor (or catalyst monitor) has never set. Every mechanic has told me ...
3
votes
0answers
967 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 ...
1
vote
1answer
105 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 ...
3
votes
1answer
2k views

How to Reverse engineer the manufacturer specific protocol on OBD2 for acquiring enhanced vehicle data

I understand that generic OBD2 readers gives a limited set of vehicle data (PIDs). Enhanced set of vehicle data could be aquired via the protocols which is car manufacturer specific (not published). ...
4
votes
2answers
3k views

OBD2 CAN Protocol: ISO 15765-4

I understand that one of the CAN protocol that OBD2 uses to read vehicle data is ISO 15765-4. However this is the one that is used by generic OBD2 reader devices like ScanTool; And it provides a ...
6
votes
1answer
8k views

Identifying faulty O2 sensor with scan tool

I have a 2002 Toyota Corolla (engine 1zz-de) and I am trying to get to the bottom of a p0171 code. I've read from other posts that a faulty O2 sensor could cause the lean condition, so I have been ...
7
votes
1answer
386 views

2008 Chrysler Crossfire - Check Engine Light

My check engine light has been on for quite sometime. I was hoping maybe somebody on the forum can give me a few pointers on what to look for. Even though the light is on, the car is running better ...
5
votes
3answers
582 views

Vehicle parameters available on OBD2 port

The vehicle parameters (PIDs) that are available on the OBD2 port of a vehicle are quite limited. And also they vary from vehicle to vehicle - both the count and parameter set itself. Have two ...
3
votes
0answers
301 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 ...
5
votes
1answer
1k views

OBD2 Mode 9 Calibration ID and Numbers

What is the actual use of the OBD2 Mode 9 Calibration ID (0904) and Calibration Numbers (0906)? Are they constant or do they change? If so, under which circumstances? I have read the standard, but I'...
2
votes
0answers
953 views

What is the difference between Toyota GTS and TIS software?

I've found two types of Toyota OEM software available. One is the GTS ( Global Tech Stream ) software which is freely available from Toyota's EU site. The other is the Toyota TIS ( Technical ...
4
votes
1answer
985 views

Mini-VCI J2534 cable question

I purchased a mini-vci j2534 and I cannot get it to work with any of the ODBii software I have. I cannot read a honda, nor 2 chevy's. Is this cable ONLY for toyota programming software? I do have a ...
8
votes
2answers
563 views

OBDII across the world?

Is OBDII consistent across the world? Any vehicle sold in North America particularly in the United States must conform exactly to all OBDII rules. What about vehicles that are sold in the US but ...
4
votes
1answer
2k views

OBD MIL commanded status and DTC stored

OBD-II Mode 01 PID 0 gives commanded MIL on (bit A7, see link) and Number of confirmed emissions-related DTCs (bit A6-A0, see link). I did hit Mode 01 PID 01 on a few cars but got surprising results. ...
3
votes
2answers
93 views

OBD reader returning “0 Codes” way too fast?

Normally, when I read my '07 Hyundai Sonata, the reader takes about 10 seconds and then returns "0 Codes" (or whatever). However, I just was checking out a 2010 Sonata. I hit Read and it popped up "0 ...
6
votes
2answers
931 views

control car's steering angle from linux

I'm trying to send steering wheel angle commands to my car. It's a fairly recent car (Renault Espace IV). I'm using an OBD2 port to access it, and I also have a ShieldCan. I managed to read data from ...
3
votes
1answer
542 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) ...
5
votes
1answer
132 views

Relation of VIN of a car with emission norms of a country it is sold

A VIN of a car determines the country of manufacture. So if a car has a VIN of Canada (CARB emission standard) and is sold in India (BS-IV emission standard), will the car comply with BS-IV standards? ...
2
votes
2answers
809 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
votes
1answer
842 views

OBD2 steering angle PID

I'm trying to get the steering angle of my car via the OBD2 port. I'm using a usb adapter, and Pyserial to read from it. I found this: https://en.wikipedia.org/wiki/OBD-II_PIDs Which lists the PIDs ...
3
votes
1answer
685 views

P2104 Throttle Actuator Control System Forced Idle error, but car runs fine

2 days ago, I had to jump start my 2009 Chevrolet Aveo. I suspect I left the interior light on all night which drained the battery. After I started the car, the engine warning indicator was on. (It ...
3
votes
3answers
257 views

Is there a viable option for updating OBD-I to OBD-II in order to increase possibility of engine tuning?

I've been told this is a terrible idea and just wanted greater confidence even though the warning against has been taken. I want to be able to fine tune a 1990 car with an OBD-I port in addition to ...
5
votes
2answers
2k views

Cannot Access ABS-control-unit with ODB2-adapter

I have an ODB2-Bluetooth-Adapter(link) to access the ODB-Protocol with my android-smartphone. It is basically working. The app that I use ("Torque") can connect to the ECU, shows me different values ...
5
votes
1answer
1k views

What does the ECU use the long term fuel trim for?

I have a 2001 Honda Prelude SH (Honda H22A4 engine). I was trying to determine how the reported short/long term fuel trims fit in to the fuel control loop (in particular I was wondering if the long ...
2
votes
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 ...
5
votes
1answer
638 views

How to calculate fuel consumption and CO2 emission on flex fuel cars using OBDII data?

Here is the thing: I'm trying to estimate the fuel consumption of cars using OBDII data. It's quite simple if we can treat each fuel and its stoichiometric air fuel ratio separately, but when it turns ...
1
vote
0answers
296 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 ...
2
votes
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)?
2
votes
1answer
149 views

Trouble Code decoding

I've got a trouble code in my car and unable to figure how to decode it. 008 0: 43 03 00 59 01 54 43 00 1: 01 55 AA AA AA AA AA I can understand the response is in multiple frames, but unable to ...
0
votes
0answers
702 views

Oil, brake, servicing reminder lights turn off using OBD-II

I am doing a project to reset oil, brake, servicing reminder lights etc. using OBD-II Bluetooth scanners (VGate and OBDLink SX Scan Tool). Basically, trying to do what enhanced OBD-II scanners are ...
9
votes
3answers
57k views

Do fault codes get recorded with a time stamp into a log with a history of DTCs?

Just scanned my vehicle for the first time to check out the code for a Check Engine Light. I grew curious if these fault codes get logged somewhere with a date and time stamp of some kind at the time ...
1
vote
0answers
548 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 ...
1
vote
2answers
1k views

What data are OBD-II scanners capable of logging?

I've been reading that certain scanners are capable of logging data that can be recorded while driving. What sort of data are most popular to be recorded? Can someone comment with examples of data ...
9
votes
2answers
3k views

2000 chevy cavalier cheap upgrades

I am a high schooler that was lucky enough to get a 2000 chevy cavalier 2.2l automatic 4 door sedan for $100 for my 16th birthday. One of the parents owns a drag strip/race track that we can use, so ...
5
votes
0answers
929 views

Difference between FMS and OBD

What is the difference between FMS and OBD. Whether OBD is a standard or protocol. Recently I am working on a GPS device to tap the CAN bus in order to integrate with our fleet management system. In ...
3
votes
0answers
249 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 ...
4
votes
2answers
469 views

Does a CEL always result in an OBDII DTC?

Will any error which causes the check engine light to go on show up as a DTC during a regular OBDII scan? This is obviously only in relation to OBDII compliant vehicles. EDIT July 26th, 2016 So I ...
4
votes
3answers
1k views

Retrieving handbrake status light and reverse light from OBD II

I have a project to replace my car's instrument panel with a Android tablet. So I'm developing an application that communicates with an ELM327 device through bluetooth. I have managed to successfully ...
1
vote
1answer
627 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 ...
2
votes
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 ...
2
votes
0answers
559 views

P1070 code error for mitsubishi space star

A few days ago - started engine in morning and while in neutral and engine cold it immediately revved to 2000 rpm... much higher than normal... once engine warmed up it drops.... but now engine ...
5
votes
2answers
5k views

DIY OBD II “Memory saver”

Since I had a need for a "memory saver" while changing a battery on a 05' S500 I decided that instead of borrowing one from a friend all the time, I will make my own.. Now isn't it just a power supply ...
1
vote
2answers
4k views

Are there any OBD scan tools compatible with a Volvo V50 2005 Europe

I understand this is not a website to ask for specific products. I have spent nearly 3 hours on the web trying to find a scanner that will be able to read and erase codes from my Volvo V50 2005 Europe ...
6
votes
3answers
1k views

Tapping into the on-board computer

I'm thinking of replacing my car's radio panel with a custom built Raspberry Pi device, something like this device. However, it's usefulness would be much larger, if I could get information from the ...
5
votes
2answers
621 views

Find all modules supported in my car

I own a Mahindra Scorpio S10 (2015 model) and want to find out what modules are there in my car (ECM, TCM, Body Control Module, Suspension control module etc.) using an ELM 327 Bluetooth device. Can ...