Should I clear fault codes?
Erasing error codes deletes the errors from the computer. In doing so, you lose the information that would help solve a problem with the car, so you shouldn’t erase them unless the problem has been corrected. Erasing them to pass a smog test generally won’t work.
What is OBD fault codes?
Diagnostic Trouble Codes or OBD-II (in light-duty vehicles) or J1939 (in heavy-duty vehicles) trouble codes are codes that the vehicle’s OBD system uses to notify you about a problem. Each code corresponds to a fault detected in the vehicle.
How do I get rid of fault codes?
Turn your ignition switch to “On.” Turn off all accessories. Press the “Read” button on your scan tool to view the engine’s error codes. Remember the code or codes in the order they were received for future repairs if necessary. Press the “Erase” button on your scanner to clear the error code.
When do fault codes get downgraded to pending?
The code is then downgraded to pending from hard fault. This is stipulated by if the testing is still run with a hard fault. There are some instances where testing is suspended with a hard fault and then clearing the light with a scan tool is the only way to shut off the light.
What are the different types of fault codes?
There are two kinds of fault codes; single trip and two trip. A single trip fault code is generally a major failure like a severe misfire. This will illuminate the check engine light immediately upon detection. A two trip fault code has to be verified on two trips.
When does an OBD fault code clear itself?
If the condition that caused the fault is repaired, or simply no longer occurring (P0420 catalyst efficiency a classic example) the code will “clear itself” so to speak after a certain number of drive cycles without the fault reoccurring.
How to find the Check Engine Light code?
Buick Check Engine Light Codes 1 Connect scan tool to the 16-pin data link connector (DLC) located underneath the steering column. The connector may… 2 Turn the ignition on. 3 Follow scan tool manufacturer’s operating instructions to access the Diagnostic Trouble Codes (DTC’s). More