What happens when you erase OBD2 codes?

On clearing the codes with the “Erase Codes” function, the system status changes to “Not Ready”. Drive for 50 to 100 miles (80 to 160 km). Take several individual trips until the system reads the status of all the components once more. “Several trips” means you shut off the engine and start another trip each time.

Is it OK to clear OBD2 codes?

The codes can be cleared with an OBD2 scanner or the battery can be disconnected to reset the check engine light. It is recommended that both methods clear all Diagnostic Trouble Codes (DTCs) from the On-Board Diangntoic computer at least temporarily.

What happens when you erase codes?

When a code clears, you know that the vehicle has been restored to good working order. However, there could be occasions when clearing the codes manually is part of the repair process. For example, a check engine light can be triggered when the gas cap isn't tightened correctly.

Can you tell if a code has been cleared on a car?

When codes are cleared all vehicle emissions tests are reset and will display a status of 'not complete'. In order to update the test status the vehicle must be driven under different conditions (town, highway, etc) so that the ECM may gather sufficient data to determine whether the tests have passed or failed.

How long do I have to drive to reset OBD?

There may in fact be nothing wrong with the vehicle; the computer simply needs to complete its checks. One week of combined highway and city driving is normally enough to reset the system and provide an accurate reading of vehicle performance.

How To: Clear Engine Codes (OBDII Scanner)

How many miles should I drive after resetting check engine light?

To make sure the check engine light does not reappear, it's recommended that you drive your car 30 to 100 miles. This enables the vehicle's “Drive Cycle” to reset, as the various sensors need time to recalibrate.

Will check engine light come back on after reset?

If there's a problem, the light will just come back

When you reset your computer's memory, the warning light will turn off. However, if there's a problem, the light will come back on as soon as the computer runs the test that caused the light in the first place.

How do I permanently delete OBD codes?

The only way to clear a PDTC is to fix the underlying problem with the vehicle that originally caused the PDTC and its corresponding DTC to set, and then allow the vehicle sufficient drive time to re-run the monitor that identified the problem in the first place.

How long does it take for a car computer to reset?

Here's something you probably don't know: after clearing the car's computer you will need to drive for about 50 to 100 miles. As you drive your car the computer will monitor all the sensors and register the results. You can use GOFAR to constantly monitor your car diagnostics.

How long do I leave battery unhooked to reset computer?

How Long Do You Need To Disconnect Car Battery To Reset Computer? Almost all sources recommend leaving the battery disconnected for at least 15 minutes to make sure that the code isn't left behind before you reconnect it because some electrical current remains in the computer for a period of time afterward.

How long do permanent codes last?

It's called mode 10, permanent trouble codes. It's any codes that still may have been cleared. You could have cleared it with a scan tool even, but the computer hasn't run through the test to clear the codes so it'll still be stored in there for up to 400 days.

How do I know when my drive cycle is complete?

15 minutes of steady driving on an expressway/highway followed by 20 minutes of stop-and-go driving with at least four 30-second idle periods. Allow the vehicle to sit for at least eight hours without starting the engine. Then, start the engine and complete the above driving cycle.

What does a permanent code mean?

Permanent codes are a special type introduced more recently which can not be cleared using a scan tool. If you have a permanent code the vehicle will clear it itself once the cause has been addressed and sufficient data has been gathered by driving under different conditions (idling, stop and go, highway)

Is it illegal to clear a check engine light?

The check engine light can be disabled by a dealer without violating the law. Although it is illegal for you to reset it after you do a service or a scan, you cannot be punished criminally.

How do you bypass check engine light?

You can easily turn off the check engine light by disconnecting the battery for 30 seconds, following that. A full drive cycle can be completed so that every (3) driver monitor is ready so that your car can pass inspection in order.

How long does it take for the check engine light to reset itself?

The car's internal computer only resets after a set period where it checks all of its sensors once more. The reset can happen automatically after around 10 to 20 cycles. A cycle is a phase where you turn on the car and turn it off again. For other vehicles, you'll have to drive around 50 to 100 miles before it resets.

How do you know when OBD2 is ready?

How do you complete a GM drive cycle?

How long does it take for catalytic converter to reset?

Drive your vehicle back to 55MPH (90 km/hr) at 3/4 throttle for nearly five minutes. The catalyst monitor diagnostics will take place during this period. If the battery is detached or the catalyst is not ready, it might take five complete driving cycles to decide the status of the catalyst.

How do you reset the PCM?

There is an easy way to resolve this issue. Please see the following steps: Press and hold the PCM info button for approximately 10 seconds until the PCM reboots. Immediately select the following from the PCM CAR > OPTION > Set PCM System > Reset PCM > Vehicle Handover > Yes > Yes.

Will disconnecting battery clear codes?

Disconnecting the battery will clear the error codes and reset the check engine light.