What are the diagnostic steps for OBD 2?

Accelerate at 3/4 throttle until 88-96 km/hr (55-60mph). This will perform the same diagnostics as in step 3. Hold Steady Speed. Hold a steady speed of 88km/hr (55mph) for five minutes. During this time, in addition to the diagnostics performed in step 4, the catalyst monitor diagnostics will be performed.

How do you reset a Chevy S10 computer?

Turn the ignition on but don’t crank the engine. Press the “erase” button on the scan tool to clear the codes on the computer, then run the engine for approximately 10 minutes to allow the computer to fully reset itself.

What should I do if my OBDII catalyst is not ready?

Accelerate back to 55 to 60 mph at half throttle. During this step the OBDII system will look for misfires, fuel trim and EVAP purge. 6. Hold at a steady speed of 55 to 60 mph for 5 minutes. Catalytic converter efficiency, EGR flow, ignition misfire, fuel trim, EVAP system and oxygen sensors operation will now be checked.

How do you replace the O2 sensor in a car?

Once you’ve replaced your vehicle’s O2 sensor, you’ll need to reset the ECU so it can properly gather information from the new O2 sensor. Open the fuse panel in the driver-side foot well, under the steering column, by pulling down on it with your fingers.

How to reset the OBD II Diagnostic monitor?

Decelerate with using the brake [or the clutch!] by coasting down to 20 MPH or less, then stop the vehicle. Allow the engine to idle for 10 seconds, turn the key off, and wait one minute. General Motors (specific) OBD II Drive Cycle

When to reset the ECU after changing an O2 sensor?

Sometimes an O2 sensor fails, and you need to replace it. Once you’ve replaced your vehicle’s O2 sensor, you’ll need to reset the ECU so it can properly gather information from the new O2 sensor.

What should I do if my catalyst monitor stops running?

The first and foremost step is to check whether the engine light is off. If your vehicle has active trouble codes, it may stop a monitor from running completely. 2. Check if your Vehicle has a Coolant Temperature

How does the O2 sensor in a car work?

The O2 sensor in your vehicle monitors the exhaust gases coming out of the engine. It determines the amount of oxygen in the gases, which indicates how well the fuel is being burned. The O2 sensor then sends information to the electronic control unit, or ECU, the vehicle’s computer.