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).
476
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Difference between fuel pressure and fuel rail pressure
In OBD PID wiki page, there are 2 PIDs listed: Fuel pressure and Fuel rail pressure. Are both of them the same? Can someone please give an elaborate explanation of it - What exactly are they ...
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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
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1
answer
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Golf 7 key stolen, which fuse to remove to disable car key reprogramming?
My Golf 7 key was stolen.
I have reprogrammed my keys to disable the stolen one.
The thief could still reprogram the stolen key as he can open the door using the hidden emergency door lock.
Which fuse ...
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Determine which features of a car are software locked
It's an open secret that a lot of cars these days are built with all of the hardware that they need to perform the operations of "extras" whether or not you pay for them. They're then ...
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Nitro OBD2 SCAM OR WORK? [closed]
I was looking into general car stuff like storage and lights the general stuff. I ran into a device called a "nitro OBD2" they have one to save fuel one to generate more power and stuff. Looking into ...
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Calculate amount of fuel injected
How do I calculate the amount of fuel injected (both gasoline and diesel cars). I want an instantaneous value.
http://www.rceng.com/technical.aspx
Websites like these ask for 'Desired Crankshaft Power'...
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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 ...
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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 ...
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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 ...
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1
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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?
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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 ...
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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'...
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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 ...
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1
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OBD 2 Fuel reading says No Data
I wanted to read fuel level from the car and display it on my application.
The communication was established using the ELM327 Bluetooth interface dongle.
The ELM module replies NO DATA for the code ...
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What is supposed to happen when my Subaru's test mode connector is hooked up?
There's an electrical connector under the dash of my 2000 Subaru Forester that is apparently instrumental in the diagnosis of some OBD-II trouble codes. It's a pair of bladed terminals like any other ...
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Decoding VW Airbag DTC from elm327
I am using PuTTY (similar to HyperTerminal) and elm 327 (OBD Link LX) on my VW Polo 2015 model to read Airbag DTCs.
Command sent: AT SH 715
Received: OK
Command sent: AT CRA 77F
...
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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 ...
6
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1
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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 ...
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Is it safe to get power from OBD 2 port for dash cam?
Most dash cams don't have a large enough battery to record while the vehicle is off so most people recommend using an external power bank. However, to my understanding, most power banks with enough ...
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3
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How useful is a low-end corded OBD-II reader for inspecting a used car?
I purchased a low-end OBD-II reader from Wal-Mart a few months ago. Now I'm in the market to purchase a used car and I was wondering how useful the reader will be when I go to look at the vehicle. Of ...
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Mode 02 - Freeze frame data use
I got some data on sending 0202 command (Mode $02, PID 02). It is the freeze frame data. I don't understand why does anyone need the data? Do anyone (including mechanics) ever open Freeze frame data? ...
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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
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2
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How is barometric pressure related to emissions testing?
In the VW emissions cheating scandal, news reports say the following:
According to the EPA, "the position of the steering wheel, vehicle speed, the duration of the engine's operation, and ...
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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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2
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Reading OBD2 too fast
I'm writing a software to make a telemetry application for my 2001 VW Golf mk4 reading parameters from OBD2 using an ELM327 compatible cable.
I succeeded so far. The problem that I have now, is that ...
5
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1
answer
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Should I clear Prius ODB-II codes?
My 2015 Prius had been sitting for several months without being started. The starter battery went flat so when I turned it on, the dash turned on and off in a loop.
I charged the starter battery to ...
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2
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Can a universal catalytic converter be legally fitted to my Prius in California?
My 2006 Toyota Prius with 280k miles is throwing the P0420 code, which means that it (probably) needs a new catalytic converter. I live in California, which makes life much more difficult to replace a ...
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7
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Is it worth getting an OBD2 scanning tool?
I have a Opel Corsa 1999 B type. It is giving me problems now. I have read a little bit about OBD2 scanning tools. But don't know if one could help me, or that I am maybe hoping for too much.
I ...
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OBD II Scanner refuses to communicate with the vehicle!
All the fuses check out
All the relays check out
Could I have a faulty ignition switch? Or an open somewhere?
How do I go about troubleshooting this?
It cycles through all the protocols, finds ...
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What does it take to program a used ECU?
I own a Mazda MPV 2000 with a faulty ECU.
The vehicle has an immobilizer.
It will not start with the former ECU.
It floods the engine with fuel.
After extensive diagnostics on the vehicle and the ...
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4
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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 ...
5
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3
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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 $...
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2
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How to view error codes on a speedometer with no OBD reader?
I have a 2000 Dodge Neon and don't have a real OBD reader yet. The other day I started to turn my car on and, before I got to the ignition the speedometer came on with a "p" and a "1684" (the check ...
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1989 Chevy Scottsdale 2500 HD 5.7 liter 350
I have just finished a body off restoration of my 1989 Chevrolet Scottsdale 2500 HD.
My question, is there an OBDI or OBDII or do I need a adapter to scan it?
Even if I rebuilt the engine and ...
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1
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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 ...
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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 ...
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3
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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 ...
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1
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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?
...
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1
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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 ...
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2
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How read/calculate the amount of consumed fuel estimated for a travel?
I read some Question like that but the best that i found is to fill the tank and read how many km you can do with that tank and register it.
But i'm developing an application that read information ...
5
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2
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How can I rev a "drive by wire" car from under the hood?
I've got a 2013 Hyundai Accent with a noise coming from somewhere under the hood. Happens only at a fairly narrow band of engine speed (1100-1200 RPM). I've been trying to hunt around for the source, ...
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2005 hyundai elantra error code p0501
So my 05 Hyundai Elantra has the check engine light on. I took it to the store & had them put the code reader on & it comes up with p0501 vehicle speed sensor performance. My question. . is ...
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1
answer
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On-Board Diagnostics (OBD) Readiness Monitors
I would like to know how does apps like Torque calculate if my car (Hyundai i10 Era) is 'Not ready' yet? What are the factors (complete list) do one checks to decide? Is there any formula to calculate ...
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How to interface with obd ii elm327?
Do I have to buy this in order to get all the PIDs and the full instruction set for communicating with the car's obd ii interface via an ELM327? I tried looking for some kind of api for the ELM327 ...
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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 ...
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1
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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. ...
5
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2
answers
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Engine lean issues
Vehicle is a 2006 Ford Courier, started having hesitation/loss of power after fill up at a gas station that I'd never been to before.
I depend on it for transport so I'm forced to still drive it, ...
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On Board Diagnostics-II for Electric Vehicles
I'm learning about OBDII, and I'm wondering whether it is valid on EV's too.
According to Wikipedia's PIDs article, the Service 01 PID 51 (or Fuel Type) has a value 8 that means that the fuel type ...
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0
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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 ...
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2
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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 ...