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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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31 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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3answers
74 views

Evap System Leak, Repair and Clear Codes to Pass USA State Emission Inspection?

I'm aware of two related issues here Does Check Engine Light Clear Itself... I need the correct 2010 ... drive cycle steps to clear a “Permanent ” P0456 code I've just completed a particularly nasty ...
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18 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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53k 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.
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Siemens sim2k-34vr ecu parametrs and service ids

I need to read parametres like RPM of the engine from siemens sim2k-34vr ECU from obd2 port through K-line protocol,I tried standard service id 0x01 to read current data but ECU said 0x01 service id ...
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54 views

Ford mondeo mk3, obd not connecting to computer

I have an Ford mondeo mk3 where the air con isn't working and there is no voltage to the pressure sensors. So I was going to look for error codes. However when I connected the obd it can't connect to ...
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1answer
72 views

To run a new ODB-II line from car computer

I bought a used Toyota Camry 2010 sometime in August. I noticed that there is no OBD-II port in the car. I have checked everywhere in the driver side and even passenger side. I noticed the car was ...
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1answer
23 views

Are “incomplete monitors” and “cleared codes” the same thing?

I have heard both usages. I guess that they are the same thing but wasn't exactly sure.
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63 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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1answer
25 views

04 Astra TS CDX: traction control light on, then power loss. No codes

This is the Australian model (Holden). Automatic transmission. About a month ago I was driving normally and the service light and traction control light came on at the same time. Performance didn't ...
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1answer
203 views

Not receiving multi line response ELM 327

I am sending the following commands to my Hyundai i20 2012 model (OBDLink SX Bluetooth device): AT Z AT H1 AT L1 AT S1 AT AL AT SP6 AT SH 7D1 18 00 FF 00 The response I am getting is 7D9 10 0B 58 03 ...
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80 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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2answers
693 views

Calculating fuel flow rate through obd || sensor not supporting 015E and 0110 commands

I have been working on a project where i want to calulate fuel flow rate using data from the obd2 sensor. The car on which i was testing didn't support the pid 015E which is for fuel flow rate. Then i ...
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1answer
632 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 ...
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1answer
123 views

Weird OBD2 error on newer Honda models

We are using an OBD device (https://freematics.com/products/freematics-one-plus/) for some research work. We tested on several cars like Honda 2006, Subaru 2018, VW Golf 2013, Mercedes GLK 2017, etc. ...
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3k 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 ...
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15k 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 ...
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74 views

Where is the injector circuit on a 2007 Toyota Yaris?

I have the PO201 error code which appears randomly every 30Km to 50 Km. The issue sounds possible as the car ran 2000Km with a damaged spark in cylinder 1 before repair. However, they are no circuits ...
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4answers
3k 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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2answers
17k views

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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3answers
10k 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 couldn'...
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1answer
86 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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3answers
51k views

What is the motorcycle equivalent of OBD-II?

I once met an OBD-II expert while traveling and asked him if motorcycles (especially the fuel-injected ones) employ a similar protocol. He said that the use of such a protocol is not as widespread ...
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15 views

Volvo - send commands to read DTCs

I tried finding out the commands a diagnostic tool sends to my Volvo and I got this - 1D D0 16 16 03 22 F1 86 Protocol - CAN 29/500 (elm command: AT SP 7) Can someone help me with the method to ...
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1answer
565 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 ...
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1answer
111 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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1answer
37 views

Obd scanner requirements

My 1998 vw Jetta just died in my garage. Does it have to be running while using a obd scanner or will the electrical system still show the fault codes? Thank you
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2answers
77 views

Interfacing with CAN bus

I am looking to write an application in C# and use both ARM based computers and x86 based computers. My question here is when using a J1939 to DB9 cable, do I need a specialized interface for the CAN ...
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2answers
92 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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2answers
1k views

Unexplained Low LTFT on my Mazda cx7 2.3 turbocharged

So, it started when i got CEL with code p0172: system too rich bank1. I took the car to the mazda dealer, they said you need to replace MAF sensor. I agreed and got the new sensor installed. Now CEL ...
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0answers
141 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
35 views

OBD2 not showing up under Bluetooth devices

When plugged into one car it shows up but in the other one it doesn't. So I know the obd2 itself scanner is not dead. In the working vehicle all functions are working. works in 2005 Porsche Cayenne. ...
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1answer
115 views

Long start then Check Engine Light On

I have a 2009 Honda Accord with about 150k miles on it. Over the last couple weeks I noticed the crank time getting slightly longer then today it took a really long time before turning over and now ...
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2answers
77 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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0answers
40 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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9answers
16k views

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 ...
2
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1answer
52 views

How does a typical OBD communication start?

I'm trying to understand how, at the level of SID (Service Identifier) ​​and PID (Parameter Identifier), a communication must start between an external scan tool and any vehicle ECU (Electronic ...
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39 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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1answer
39 views

Use OBD to check car status

i wanted to know if it's possible to use a cheap OBD scanner connect the car to a computer and see the status of the locking system, if the car is locked or not, i dont want to change or send orders ...
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16 views

What does P0328 means?

Knock sensor High Input The problem reappears even by clearing the error with the knock sensor unplugged… Is it something expected ? Does it necessarily mean there’s a short circuit ? If not what ...
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3answers
20k views

OBD2 not communicating

Long story shortened... I have a 00 GMC Sierra, 4.3 v6 SE Stepside. I back probed the wrong plug wire on the BCM using the wrong method (test light rookie mistake, DMM only...got it, lol). The ...
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1answer
244 views

Can I use a BMW round 20 pin to OBD II adapter with a OBD II scanner?

I'm looking to buy an e30 or e36 BMW and 99% of those don't have an OBD II port because they were made prior to 1996 but they all have the BMW round 20 pin I believe. I came across this adapter:and I ...
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2answers
44 views

Battery died a few months ago. Since then catalytic converter smog test not passed

I have an old 2000 Camry car that died in storage and so I replaced the battery 4 months ago. That reset all the monitors. Since bringing it back up it also had a check engine light which required me ...
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1answer
52 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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70 views

OBDLink Settings for Fuel Economy

Specs: App: OBDLink v5.4.1.1072 (iOS) Adaptor: OBDLink MX+ (bluetooth) Vehicle: 1999 Ford F250 7.3 turbo diesel (Aug 98 Production) Have been working with this Scantool for a couple weeks now, by ...
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3answers
65 views

Are all OBD current data available on the CAN-BUS without request?

I am analyzing the CAN-BUS data from my motorcycle. I logged all the CAN-BUS traffic. One time with an ELM327 adapter connected and one time without. I am searching for the value of the Intake air ...
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1answer
84 views

Is OBD II is still relevant or does it have a future?

I am thinking to invest and buy an OBD-II scanner. Before I do that, I need to know for how long automakers will comply and support OBD-II standard. I am asking since I am planning to buy a 2019 ...
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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'...
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3answers
129 views

Developing an OBD2 application - Engine Warning Lights

I am currently developing an application which retrieves diagnostic trouble codes from my car's OBD system and display any DTCs in a list. However, as my car has no trouble codes I am unable to test ...
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3answers
83 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. ...