How it reset service engine light

Since there are various different warning lights exactly which warning light is appearing after 20 minutes?

If it is the oil service warning light that is appearing then that has to be reset manually when the oil service is done.

Check your owner manual-- on how to reset the light or
ask a dealer to show you

The oil and the filters must be replaced immediately or the engine will be damaged.

This is a service required warning light
B" indicates the following services are due:
- Change engine oil and filter, inspect brakes, check parking brake adjustment - Inspect : steering components, suspension components, rubber boots, brake lines, fuel lines, exhaust system, fluid levels and conditions "1" indicates: - Rotate tires

BLINKING ENG. WARNING LIGHT .THIS THE INDICATION THAT THERE IS NOT ENOUGH OIL AND OIL PRESSURE IN THE SYSTEM AND YOU SHOULD ADD ENG OIL AND BRING THE CAR THE TO BE SERVICE REPLACING FILTERS AND OILS PLUS CHECKING THE CARS SAFETY FEATURES--BREAKS LIGHTS, HAND BREAKS ETC ETC ...

It simply means that the service indicator was not reset when the oil was changed. If the oil was changed professionally, then resetting the service indicator is usually part of the job.

It's not just a reminder to change the oil, it's also there to remind you to check/adjust/lubricate/replace other items such as the air filter, oil filter, spark plugs, fuel filter, dampers (UK=shock absorbers) etc.

The service indicator is simply a dumb counter keyed to mileage and time elapsed and cannot sense when you have completed a service. Resetting the indicator requires a special tool so you'll need to take your car to a suitably equipped garage.

Perform service indicator warning is a heads up that another oil change is needed. Your vehicles computer calculates a duty cycle for service intervals; Driving distance, stop and go etc... Change the engine oil, and reset the alert, and you'll be fine.

You can disconnect your battery for 15 minutes or pull the fuse for an ECM or PCM fuse, but the best way is to visit any local repair shop. Most shops will have a universal Check Engine Light Code Reader that can quickly and safely reset check engine light trouble codes. It should take about 30 seconds.

Ask your local service center if they could reset the check engine light with a Check Engine Light Code Reader.

most likely requires a service make sure engine oil/air/fuel filters are changed when beeing serviced check charging rate,aux belts etc reset light

if you have a owners manual read it. try coloradofans.com website and search the forums. i think johnny5846 is right if you don't have a DIC (driver info center). i believe you use the DIC(tripodometer). i don't know the sequence off hand, you can also you can change your lock settings and alarm settings, etc. with the DIC.