What Would Cause a Code Reader Not to Read the Codes in My Vehicle
Guide to OBD codes and how to read them
How to read and interpret OBD diagnostic codes
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Understanding OBD codes is a vital attribute of vehicle maintenance as office of a strong fleet tracking and management strategy.
When the Check Engine calorie-free pops on, it tin can signal a wide range of problems with your vehicle. Symptoms of the problem may not be apparent, and a unproblematic light on its ain can't tell you whether the issue lies with the fuel arrangement, ignition, manual, calculator circuitry, emission controls, or elsewhere.
Modern vehicles have onboard diagnostic computers (OBDs) that enable a mechanic with the right tools to apace sympathize any problem that the vehicle is experiencing. When something goes wrong, the OBD reckoner stores a five-letter of the alphabet diagnostic trouble lawmaking (DTC) that summarizes the issue at hand. These are also unremarkably known every bit OBD codes or OBD-2 codes.
Through the utilize of an OBD scanner, you can get this v-letter code from the vehicle then you know exactly what needs attention.
- Our guide to the all-time GPS fleet tracking solutions
- How does fleet management work?
- The best fleet management software and services
How to read OBD codes: Training
Reading OBD codes requires an OBD scanner, which can cost between $30 and $threescore. It'southward a handheld tool with a 16-pin trapezoidal connector that plugs into the vehicle and interprets the OBD code. Y'all don't need any other tools, just access to the interior of the vehicle.
Step 1: Plug the OBD scanner into the OBD port
Your OBD scanner has a sixteen-pin trapezoidal connector that fits into the vehicle'due south OBD port. This is as well known as the diagnostic link connector (DLC). Each vehicle has a different location for the OBD port, but nearly of the fourth dimension, you lot'll find information technology nether the driver'southward side dashboard well-nigh the pedals. In rare cases, it volition be in the center dashboard or below the glove compartment. Check your possessor's manual for the precise location of your DLC.
Pace 2: Turn on the ignition
Plow on the ignition in the vehicle, but don't start the engine. Turning on the ignition will send power to the OBD scanner, which will begin communicating with the vehicle'southward on-lath computer. You'll run into a message like "establishing link with OBD" while the scanner is initiating.
If the scanner doesn't light upwards when you switch on the ignition, check the connectedness between the scanner and the connector pins. If information technology's still not working, check whether there is ability coming through the car'south auxiliary ability outlet (aka the cigarette lighter). The OBD system gets its power from the same circuit, and so if there's no voltage going to the power outlet, then the OBD scanner won't work either.
Stride three: Enter the Vehicle Identification Number
With some OBD scanners, you'll have to enter the Vehicle Identification Number (VIN), make, model, and engine type of the vehicle. This is considering some OBD codes are manufacturer-specific, and then the scanner will be able to requite you lot more than accurate information if you enter more than details about your specific vehicle.
Next, navigate to the Codes carte on your OBD scanner. Each scanner is dissimilar, but typically, it will exist called Codes or Trouble Codes.
In many cases, you lot'll also be asked to choose betwixt Agile Codes and Pending Codes. Active Codes refer to malfunctions that are causing your Check Engine calorie-free to stay on. Awaiting Codes are errors that have occurred at least one time but haven't yet acquired the Bank check Engine calorie-free to trip. If the blazon of error happens again, though, the Pending Code volition be updated to an Agile Code, and the Check Engine low-cal volition plow on.
Step 5: Interpret the first character of the OBD code
Now you have the OBD code, you demand to be able to interpret what it means. Each character of the code tells you something well-nigh the fault. The commencement one gives y'all an overview of the issue at hand.
If the first character is a P, there's a problem with the powertrain system. If it'due south a B, in that location'south something wrong in the body system, which could bespeak an issue with the airbags, for instance. If the showtime character is a C, there'southward a trouble in the chassis, such as an issue with the anti-lock brakes. If it'due south a U, the network communication system has an event.
Step 6: Interpret the second graphic symbol of the OBD code
The second graphic symbol in the code defines whether the trouble is a generic event or a manufacturer-specific issue. When creating the OBD code system, the Society of Automotive Engineers chose standard codes for problems that can occur on most cars. These are known as generic codes. Some manufacturers have added their own codes because their parts aren't accurately reflected in the generic list. These are the manufacturer-specific codes.
Look at the first two characters of the OBD code. If they are P0, P2, P34-P39, B0, B3, C0, C3, U0, or U3, the issue is generic. If they are P1, P30-P33, B1, B2, C1, C2, U1, or U2, the trouble is manufacturer specific.
Most of the time, the result volition exist P0 or P1, which specifies that there'south a trouble somewhere in the powertrain system.
Pace 7: Interpret the third character of the OBD code
The third graphic symbol gives us even more specific data on where the problem lies. Each type of issue (powertrain, body, chassis, network communication system, etc.) has its ain interpretation for this number.
In the example of powertrain problems, a 1 indicates a fuel or air metering organization problem, a ii means at that place'due south a fuel or air metering injection system issue, a 3 indicates a problem with the ignition system, a iv is an emissions systems fault, a 5 is a speed control or idle control issue, a six is a computer/electronics trouble, and a 7-9 indicates that something'due south wrong with the manual.
Step 8: Interpret the final characters of the OBD code
The final two characters of the OBD lawmaking specify the verbal error. With thousands of potential faults, to get the exact details of the effect, you'll need to go online and use ane of the many OBD Code interpretation websites, such as OBD-Codes.com. Enter the total OBD code, and the website will return full details on the fault experienced and how to set it.
Summary
Modernistic vehicles make diagnosing vehicle trouble easier through the use of OBD codes. You tin use an OBD scanner to find out why your Bank check Engine light is on. The five-character code details the vehicular system that's experiencing a problem, and you can even interpret the code yourself by examining its characters.
However, in that location are so many possible OBD codes, it's commonly easier to enter the OBD code returned by your scanner into an OBD Code estimation website to find out what that specific lawmaking means.
Further reading
- Our guide to the best GPS fleet tracking solutions
- How does fleet management work?
- The best fleet direction software and services
Richard brings over xx years of website development, SEO, and marketing to the table. A graduate in Reckoner Science, Richard has lectured in Java programming and has built software for companies including Samsung and ASDA. Now, he writes for TechRadar, Tom's Guide, PC Gamer, and Creative Bloq.
Source: https://www.techradar.com/how-to/guide-to-obd-codes-and-how-to-read-them
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