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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33 views

What would it take to program this ECU?

So im trying to find a way to reprogram my bikes ecu. Theres a bluetooth adapter and an app that the bike manufactors sell it can modify the ecu but it cant do what i want. It uses a bluetooth box ...
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1answer
27 views

OBD-II Scanning Bluetooth | Are Fault Codes Encripted?

I bought JDiag Fastlink OBD II scanner which is based on ELM327 based OBD II scanners. I noticed that the scanner was able to read all the instrument panel reading such as fuel level, engine ...
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47 views

Increase volts at OBD port

My fixd scanner only says low voltage. How can I increase the volts at OBD connection my check engine light is on trying to get code. 1999 GMC Sierra 2500 with a 5.3 litre Vortec engine Scanner ...
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How do you diagnose a P0491 on a VW CC 2010?

Error Code P0491 is defined as Secondary Air Injection System Insufficient Flow Bank 1 I have a VW CC 2010 2.0L TSI Sport which has the CBFA version of the engine which basically means it has an ...
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25 views

Mk6 Ford Fiesta 1.25 OBII oxygen sensor readings

Plugged my Mk6 Ford Fiesta into Forscan Lite today, and got the following faults below. Was curious to see that both the 021 and 022 flatline at near zero volts at 2000 rpm. That's not normal is it? ...
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32 views

Are OBD-II devices capable of controlling acceleration and top speed of a car? [duplicate]

I have been searching for a while for some specific type of OBD-II devices that can, besides performing the usual diagnostics, also do the following: GPS track the car online Has the ability to set ...
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31 views

Will my car pass emissions if all monitors pass scanner except EVAP monitor

I had toyota remove a P code off my 2010 1.8L corolla after a repair. I need to pass emissions in Arizona in the next 2 weeks. I went to AZ and they let me borrow the scanner so I plugged it and ALl ...
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58 views

What is “transmission slip ratio” and is it normal to have anything other than 1.0?

I got a 5.4 Ford econoline 1998 edition. I got me a odb2 code readin app with the bluetooth on it... and I also paid extra to unlock the premium Ford specific data... all kinds of stuff in there. In ...
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62 views

Is it possible to clear “permanent codes” on a Volkswagen Jetta?

I was inspecting a 2011 Volkswagen Jetta today and saw on my OBD reader that it had two misfire codes, if I remember correctly P0302 cylinder 2 misfire and P0300 multiple cylinder misfire. The check ...
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128 views

Feelin' a misfire but ain't showng no misfire in the computer

I swears when I turn on my van just sitting there I feel a misfire more often than any good person should. In my opinion, I shouldn't be feeling any weird shakin or nothin. When she's been driven a ...
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25 views

Data captured when an error code is generated

I have a 2015 Ram 1500 that has just over 60,000 miles (107000 km). They did a diagnostics and there are several transmission error codes. Is the mileage tracked when the error code is captured. ...
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35 views

Which DLC terminals are known as DLC bias terminals (or should it be DLC Bus terminals)

This is related to Test 5 of this question: OBD II Scanner refuses to communicate with the vehicle! Funny that I should be asking this but then .....it happens Unfortunately, I cannot remember. I'd ...
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22 OBD codes 2008 Chevy Tahoe :D Help

I just inherited a 2008 Chevy Tahoe LS 5.3L V8 with 239,730 miles. When scanning for codes it listed about 22 codes. I know the obvious thig to do is to take it into a mechanic but i want to see if ...
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38 views

Can we know Brake pedal pressure from generic ELM 327 BLE OBD dongle? [closed]

It would be great help if someone can help me to learn how to measure brake pedal pressure from ELM 327 ?
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84 views

Compiled list of OBD-II protocols used by various vehicles

Has anyone compiled list of OBD-II protocols (physical layers) used by various vehicles? they're required to be J2534 compatible but what about manufacturer specific pins? is it even common for ...
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1k views

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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24 views

Volkswagen GTI OBDII Readiness

I have a 2015 Volkswagen GTI SE (2.0T) which is (a little over) due for an emissions test. A few weeks ago I had some rear-end bumper damage repaired, and while in the shop they cleared the trouble ...
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80 views

Cannot connect OBD devices to ECU on Toyota vehicles

I have two ODB devices. One is ELM327 Wifi OBD2 and the other one is OBDLink LX Bluetooth. My problem is that none of the OBDs connect to Toyota cars. More specifically: I have tested the two OBD ...
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602 views

OBD2 Scanner can not detect ECU 2002 Mitsubishi Lancer

I bought a OBD2 Bluetooth scanner online. However, when I connect it to the OBD2 port in the car, the app while connecting to the OBD2 scanner gives an error message that it cannot connect to the cars ...
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132 views

Engine jerks at certain RPM - Misfire & fuel system over pressure [P000F, P0302]

My Audi A5 1.8t has started having some hiccups after an engine job (Changed valves, timing chain & camshaft intake side) The car starts fine, it sounds fine, but it has the following problems: ...
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1answer
75 views

Using a device with external power and receive data from the CAN bus

I want to keep a device in always on situation in the car. I do not want the device to drain the car battery. The car is used at least once in two days and the current consumption of my device is ...
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75 views

Suzuki Swift Sport and ODBii

I recently purchased a new Suzuki Swift Sport, and wanted to use the Torque App for some checking ( mostly enjoy parameter reading, graphs.... ) but my wifi adapter was unable to communicate with the ...
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1answer
337 views

Can I trickle charge battery through OBD2 port 2007 civic

Trying to determine if 2007 civic OBD2 port is live with key off so I can trickle charge with a solar panel
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433 views

Can one set idle rpm through a commercial OBD diagnostic tool?

I'm talking about "permanently" setting the engine's ECU to maintain an idle RPM of my choice, say, 1200 or 1500? (by "permanently", I mean something that would be maintained after power cycling) If ...
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1answer
136 views

Tacoma inducing monitors after resetting ECU

My 2006 Toyota Tacoma had a check engine light, which I decided to try to turn off for the purposes of vehicle inspection. I thought that was okay because the problem was not emission-related but ...
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2answers
61 views

Can I Connect dashcam Blackvue DR900S on OBDII connector in Volvo XC70 2015?

Do I get 12V on OBDII pin 16 without ignition ON?
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1answer
111 views

Why does my OBD2 scanner not reset the errors as well as a mechanics?

My car has an intermittent fault that cannot be fixed. It has been to the garage so many times now and they cannot find the fault. I figure there is no point putting more effort into trying to fix ...
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42 views

GMC VLOM replacement necesssary

I replaced the head on a 2012 gmc 5.3 vortec. Now getting codes of 3401,3425,3443 & 3449. Being told it is always necessary to replace VLOM when doing this kind of work. Is that true?
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1answer
295 views

Will the check engine light come back on if I erase the code using OBD2?

My check-engine light came on. I have a 2003 Ford Ranger 4.0L. I'm new to using the OBD tool. So I used the tool and was very happy to get the result so easily. It is P0456, which means a very small ...
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1answer
86 views

What to look for when buying an OBD-II scanner?

I'm looking into buying an OBD-II scanner for my vehicles, but it seems there is more to consider than I initially thought. I had assumed that any OBD-II scanner would be able to read and clear codes, ...
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71 views

Electricity not working when car is off

2015 Honda Accord Replaced the battery in my wife's car. After replacing the battery, it seems as though none of these things work when the car is off - Headlights, Dome light, Power locks, key fob (...
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110 views

Mazda 3 OBD - CAN codes(ELM327) Programming

I have Mazda 3 (2005) and i read a while ago that i can use ELM327 (OBD2) to automate many tasks like. Lock & Unlock my cars doors Check whether my car doors are locked Check A/C Temperature ( I ...
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42 views

Can I read PID from other protocol?

My car (Renault Megane II) sharing PIDs through KWP protocol but also sharing other data (more advanced) through CAN. Some of data which I want to read is not available through KWP (PID). Is there a ...
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36 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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1answer
68 views

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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3answers
334 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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1answer
30 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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1answer
103 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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1answer
146 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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20 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
50 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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1answer
268 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
70 views

How can I test alternator

The voltage of my car battery is not fixed when AC going to active. In fact, I saw that the voltage dropped when the compressor clutch turns on. I suspect alternator and battery. Now I want to test ...
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92 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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139 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
45 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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21 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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1answer
48 views

How can I understand which will my car needs new sparkplugs? by ODB

I have bought an OBD2 Android. I saw many parameters in that. I was confused. But I want to know which will my car needs new sparkplugs? of course by OBD parameters.
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2answers
305 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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278 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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