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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14 views

Cannot connect to gateway node of CAN bus through OBD2 port

I wanna connect to can bus of my car. I read in the manuals that obd2 is hooked to high speed can bus of something called CCU node and this CCU node acts as gateway between HS and LS canbus. When i ...
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25 views

Can an OBD2 tester do a battery load test?

This Autophix device device was suggested by a review as the best of five battery testers. The text implied that includes testing cranking amps. But it can only connect to the computer—has no way to ...
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42 views

Wireless control of trailer board lights

Is there a (Bluetooth?) OBD module that can transmit to a receiver that remote controls a car trailer board lights ? I have seen the magnetic bluetooth "stick on lights" that are powered by ...
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36 views

Clear OBD-II codes automatically? Either with sollid-state device or smartphone app/widget

Been using an ELM327 adapter with various apps to clear OBD-II trouble codes. While this works, wondered if there is an app or device which can do the following without intervention: Clear all obd-...
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52 views

What does OBDII fault code P0120 really mean?

What does OBDII fault code P0120 mean? The device said: "TPS/Pedal Position Sensor A Circuit Malfunction". The problem is that TPS stands for: "Throttle-body Position Sensor, which sits ...
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33 views

2006 Honda Civic Hybrid, error lights on dash, and codes

A few months ago, my Civic Hybrid started giving me issues. When I start it in the morning, I have to hold the key for a few seconds before the engine catches. Once the engine is running, my IMA light,...
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715 views

Would OBD-II devices drain the battery when used 24/7?

There are many OBD-II devices out there that can scan and/or monitor real-time data about your car. Most of these devices are readable via USB or Bluetooth. Either USB or Bluetooth, both require some ...
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49 views

How does a OBD II misfire detection monitor know “exactly” which cylinder is misfiring?

I do know that magnetic pick-up coils are used to detect crankshaft position and these sensors are used to tell which cylinder is misfiring. These magnetic pick-coils do not produce a smooth & ...
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36 views

how to check car for impending failures? [closed]

My kia Sorento 2007 failed on me multiple times. Each time disabling the car and putting the driver in danger harmonic balancer alternator radiator and water pump in each of those failures, I had ...
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34 views

OBD2 for car customization

i was wondering if it could be possible use CAN protocol to automate some of my car (Suzuki Swift 2016 1.3 DDiS) processes, such as close windows when door get locked. I found lot of applications/...
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162 views

Run a forced DPF regeneration using OBD-II diagnostics

Our Jeep Grand Cherokee 2015 has problems with its exhaust filter. The error says we should drive safely at highway speeds to remedy but even after driving a few hours, it does not recover. It is ...
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1answer
59 views

What is typically involved to repair a internal combustion engine that has a cylinder misfiring?

I have a vehicle with a cylinder misfiring (according to my OBD-II code reader). I have decided to have a mechanic repair it, as I have never performed a similar motor vehicle repair. Note that the ...
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53 views

2009 Volkswagen Jetta TDI diesel 2.0L

I have 2009 Volkswagen Jetta TDI diesel 2.0L, they saying this car required CAN bus system instead kwp2000. My question is: How does the protocol Id change? Maybe ECU is defective? Some people told me ...
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63 views

P0491 Secondary Air Injection System Insufficient Flow. Stumped

My VW CC 2010 is having a CEL with the code P0491 which means the pressure sensor is not detecting enough air being pumped from the intake into the exhaust. No other codes. No problems since this is ...
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130 views

2010 Ford focus Zetec 1.6 Diesel U0073 DTC

I've had my 2010 Ford Focus Zetec 1.6 TDCi for a week now. There is the DTC U0073 (control module communication Bus 'A' off) on it. There is no issues with the car,no warning lights on dash, drive is ...
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1answer
48 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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193 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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73 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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53 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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247 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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166 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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1answer
518 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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1answer
133 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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41 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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64 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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28 views

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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92 views

Get Brake pedal position from generic ELM 327 BLE OBD dongle [closed]

What is the code to get the brake pedal position using the generic ODD2 (ELM327) dongle
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3answers
99 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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3answers
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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50 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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1answer
219 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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2k 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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214 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
84 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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124 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
825 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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1answer
964 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
206 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
67 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
213 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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82 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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2k 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
93 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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73 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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39 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
95 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
926 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
42 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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126 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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339 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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