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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1answer
56 views

Auto door lock does not work with automatic transmission shifting to and from “Park”

My toyota corolla 2014 Altis auto door lock has not been worked. I read Electric central door lock does not work with automatic transmission shifting to and from “Park” and also Toyota Corolla ...
1
vote
2answers
18 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
1answer
30k 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 ...
4
votes
3answers
223 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
0answers
26 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 ...
2
votes
0answers
41 views

Does OBD II pin 16 output is always 12 Volt?

Does OBD II pin 16 output is always 12 Volt? Is it possible to the voltage is altering when ignition on, like rising from 12 to 14 Volt? Or Voltage output of the buses, trailers, heavy duty vehicles ...
4
votes
0answers
56 views

OBD Accessory External Power Supply

I recently purchased the Zubie Car Hotspot from Verizon that connects to the OBD port on a car. I have mine connected to the Tesla Model X, unfortunately I need the connection to remain always on but ...
2
votes
0answers
34 views

2005 Impala OBD2 not working right

I have a 2005 Chevrolet Impala (Base trim, 3.4L) and I recently purchased a cheap OBD2 Bluetooth reader. Unfortunately, Torque (Android app) isn't able to read data from this transmitter when ...
3
votes
2answers
257 views

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 ...
8
votes
4answers
833 views

Is control module voltage and battery voltage the same?

Is the Control Module Voltage (from OBD Mode 01 PID 42) and battery voltage the same? If not, what is the relation between them? Why is the max value of Control Module Voltage (from OBD Mode 01 PID 42)...
1
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1answer
36 views

How to detect Passenger Seatbelt Indicator using OBD2

I have trouble code information as below for B00D1 OBD Trouble Code which use to detect Passenger Seatbelt Indication. I am referring below links to get trouble code information: http://www....
5
votes
1answer
49 views

What's the Difference Between OBDII adapters and Toyota Mini VCI?

I've been researching Toyota diagnostic connectors, and ran across something called a Mini VCI adaptor meant for use with Toyota's TechStream software. The physical interface looks like a standard ...
4
votes
1answer
36 views

What kind of DLC did Toyota's have before switching to OBDII?

What kind of DLC did Toyota's have before switching to OBDII? What year did they switch to OBDII outside the United States?
0
votes
0answers
19 views

TXD, RXF, RxD, MTH understanding and decoding

http://www.scangauge.com/support/x-gauge/xgauges-for-cansf-vehicles/ This website lists data reported by certain sensors. Lets take an example: Gauge = Short Term Fuel Trim Bank 1 TXD = 07E00106 ...
1
vote
0answers
53 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 ...
0
votes
1answer
26 views

Auto determine the bluetooth device is OBD or not?

Current I am working on OBDII. While in bluetooth discovery to connect obd, How I determine which device is obd and which device is normal bluetooth device.Because I want auto connect my app with obd. ...
4
votes
1answer
27 views

Mode 06 approaching failure limit

In Mode 06 (OBD), one gets a current value, max value and a min value for every MID, TID supported. If the current value is out of the max/min range, that MID, TID is considered a 'Fail'. But there ...
5
votes
2answers
44 views

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 ...
3
votes
1answer
36 views

Interface tracking device with OBD II (or alternative sources of data)

I have recently been working on writing software for some very small tracking devices. I decided to take on an electronics engineer and start building some boards myself using a GPS/GPRS module. I ...
8
votes
2answers
102 views

How do I get to see my Mode 06 in OBDii

Mode 06 in OBD2 is good to get an insight of what faults the car might encounter in the future. But I am unable to find out what command should I send to get Mode 06 data. It has TID$01 CID$01, so how ...
5
votes
3answers
117 views

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? ...
3
votes
1answer
38 views

My 2005 Honda Accord with OBD codes: 0507 and 0011. Howto Troubleshoot

The check engine light came on very recently with two error codes being thrown. From this source, the following will cause 0507 P0507 HONDA - Idle Control System RPM Higher Than Expected A vacuum ...
18
votes
3answers
640 views

What are good features to look for in an OBD-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 OBD-II reader to be able to find out for ...
4
votes
1answer
58 views

Android App for ELM 327 that allows to reset codes for Cadillac CTS

On my Cadillac I get engine light to come up because I have changed my petrol cap and sensor is malfunctioning. I got myself wifi ELM 327 OBD-2 reader, and by using my laptop I managed to get RPM of ...
3
votes
1answer
80 views

Is it Possible to Control Lights through OBD-II Port?

Is it possible to use a car's onboard diagnostic port to toggle the headlights, interior lights, or parking lights? If not through the OBD-II port, how would I go about remotely toggling the lights on ...
5
votes
2answers
588 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 ...
2
votes
1answer
74 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 ...
7
votes
1answer
6k 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 ...
9
votes
2answers
170 views

Received frames from vehicles with multiple ECU chips

I'm not generally a 'car person', so hopefully I can explain this well enough to get some help here: When sending messages to an OBD-II device, I receive one response in most cars I've tested. ...
0
votes
1answer
71 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?
3
votes
1answer
42 views

(Mandatory in the EU) CAN through OBD-II?

I know that in the US, since 2008 vehicles must have a CAN connection on the OBD-II plug, but what about Europe? Do vehicles have to add CAN to the OBD-II plug? Or is it possible to directly send ...
2
votes
0answers
81 views

Ford Focus 2008 Error code: P2585-61

I own a Ford Focus 2008 1.6 TDCI. Recently I filled the DPF Additive tank with EOLYS Fluid but I couldn't regenerate and reset the values that day, so I drove to my home. Following day, I went to ...
4
votes
0answers
121 views

Mahindra KUV 100 and Suzuki Alto OBD protocol

Can someone please tell me the OBD-II protocol of Mahindra KUV 100 (diesel) and Suzuki Alto (diesel). Also whether ELM 327 Bluetooth will work? http://www.ebay.in/itm/SuperMini-ELM-327-Bluetooth-v2-...
9
votes
4answers
367 views

Disabling OBD2-Interface in a car

If a car-thief wants to steal a modern car, he often uses the OBD2 (On Board diagnosis) to "hack" the car. Simplified: He achieves this by plugging his "hacking device" in the port, which aquieres ...
1
vote
1answer
109 views

Toyota Fortuner OBD2 protocol

I used an ELM 327 and Torque app in one of my friend's Toyota Fortuner (2012 model), but didn't get correct data. Rpm was nil, Air intake temperature was negative, Load was constant at 6.66667%. After ...
4
votes
1answer
53 views

What does it mean when the ELM327 OBD2-reader gives two lines of info for 0100 request?

I have an ELM327-based OBD2 reader that I can issue commands to when connected to a car. I'm running this on a 2015 Acura RDX. When I issue the request 0100 to get supported mode 1 PIDs, I get the ...
4
votes
1answer
424 views

Nitro OBD2 SCAM OR WORK?

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 ...
3
votes
1answer
51 views

Need explanation on Commanded EGR and ethanol%

There are 2 PIDs listed in this Wiki page - Commanded EGR and ethanol%. I have tried getting the values from some cars but have not succeeded. I am curious to know what do these 2 PIDs mean? Can ...
4
votes
2answers
416 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 power,...
3
votes
1answer
87 views

What OBDII protocol does a 2014 Mitsubishi Outlander use?

I was trying to help out a friend with an intermittent stalling issue, but the OBD Fusion app could not connect to it via my ELM327 Wi-Fi adapter. The protocol setting was set to "Automatic", which I ...
4
votes
2answers
120 views

Stopping distance of a car

I want to calculate the stopping distance of a car from an OBD2 device. Say, I am driving at 30 kmph and apply my brakes hard. My car will skid and stop at a distance "x" meters from that point. This "...
3
votes
2answers
161 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 ...
7
votes
1answer
89 views

Erratic single fault code: P0420, P0440, P0446. Normal variance, or indicative of something deeper?

Working on diagnosing an evap/emission/fuel system problem on my Toyota 2003 Corolla. More on that in this question. On 3/2, I saw a mechanic use his handheld OBD to read a code P0420. On 3/12, ...
5
votes
1answer
101 views

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 ...
4
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1answer
108 views

obtaining Remaining Fuel Level from a 2004 VW Polo (Mk4)

If I have a 2004 VW Polo and this uses a K-Line Bus (I think), how can I retrieve the fuel Level in the tank if the information is not made available as part of one of the standard OBDII PIDs (I think ...
4
votes
1answer
74 views

What is SAE 0x15 Short Term Fuel Trim Bank 1 Sensor 2?

I was taking a look at a neighbor's car, and noticed this PID stuck at 99.22% This is in addition to the regular STFT PID 0x06 which is staying fairly close to zero most of the time. What is this ...
2
votes
1answer
84 views

Car OBD protocol?

I would like to connect OBD2 GPS device in my cars. OBD2 connector support limited OBD protocols. I can't find which protocols present in my cars. So i just want to know what protocol is present in my ...
5
votes
2answers
93 views

Is it possible to access multiple CAN buses through the OBD-II port?

As usual I apologize if this has been asked and answered somewhere. I try to only ask questions if I can't find an answer or a satisfactory answer. From my understanding the OBD-II port on vehicles ...
3
votes
1answer
46 views

Can we determine the Cleaning Requirement of Air Filter Using OBD

Many a times, the dealer guy says that the unclean air filter consumes more fuel as compared to clean. So, my question is, is this really related to air filter? If yes, can we determine the case using ...
3
votes
1answer
113 views

How to calculate Car “Distance Till Empty” without knowing the fuel level

I've Renault Duster RxZ. I would like to calculate the DTE(Distance till Empty) which is based on the "how much fuel the car has" and the "mileage of the car" ? Currently the OBD doesn't return ...