How do I reset my drive cycle?

Start the vehicle and let it idle for two to three minutes in Park or Neutral. While it is idling, turn on the head lights, heater/defroster, and rear defroster for a three to five minute warm-up phase. Let the idle speed settle down to near the normal speed.

How do I reset my smog monitor?

General Motors Drive Cycle For Smog Check

Start the vehicle from a cold start.
Let the engine run on idle.
Accelerate to 55 mph.
Hold a steady speed of 55 mph for 3 minutes.
Let go of the accelerator and coast until the vehicle hits 20mph.
Accelerate again until 60 mph.
Hold steady for 5 minutes at 60mph for 5 minutes.

How do you cheat a smog test?

To cheat a smog test, prepare your car prior to the test; get rid of the engine light, inflate car tires, pre-inspect the car, and do not drive on rainy days. An illegal smog test costs $100, however, the test administrator may charge higher or lower, depending on the number of test facilities in the area.

Can you pass smog with catalyst not ready?

Answer: Depending how old your vehicle is, the catalyst monitor might be allowed to remain incomplete and the vehicle still pass the smog inspection. Currently 1999 and older gasoline powered vehicle’s are allowed one incomplete monitor.

Can a faulty oxygen sensor cause a smog failure?

What can cause a smog check to fail?

Needless to say oxygen sensors require periodic replacement. Failure to do so will more then likely cause a smog check failure. 4 out of 10 high CO failed smog checks will be due to a defective, damaged or lazy oxygen sensor. It is probably one of the most underrated emissions components and should be payed much closer attention.

What are test only SMOG stations ( O2 sensor )?

Ask-A-Tech! What are Test Only Smog Stations? The Oxygen Sensor, also known as the O2 Sensor is the component responsible for delivering exhaust information to a vehicle’s emissions computer. Most late model vehicles will be equipped with both a pre-CAT oxygen sensor and a post-CAT oxygen sensor.

Why did my Honda Accord fail the smog test?

My 1996 Honda Accord failed the smog test. The smog technician highlighted these three things: A/C Refrigerant, Oxygen Sensor, and Catalytic Converter Efficiency. But yesterday I disconnected the battery because I installed a new car stereo and subwoofer.

How do I reset my Drive Cycle?

How do I reset my EVAP code?

How long does it take for EVAP code to reset? Start the engine and idle for four minutes, then drive in stop-and-go traffic for five minutes using smooth accelerations and decelerations. Stop and idle for 4 minutes. The EVAP monitor should be complete.

When to do the catalytic converter readiness test?

The readiness test can be completed in cold ambient conditions (less than 14°F / –10°C), if the drive pattern is repeated a second time after cycling the ignition OFF. – Connect the OBDII Scantool to DLC3 to check monitor status and preconditions. – Note the IAT (Intake Air) value during engine startup.

What should the OBDII reading be on a bad catalytic converter?

The ECM would interpret that as a bad catalytic converter. In that case, your OBDII scanner should be reading a lean 0.1v reading from the downstream sensor. You can add propane fuel to the exhaust to force the reading up to prove that the downstream sensor is good.

Can a bad catalytic converter cause an oxygen sensor to go bad?

In 99.5% of the cases, this code means that the catalytic converter itself is bad and must be replaced. However, I see questions all the time on auto forums asking if a new oxygen sensor will fix the problem.

What does P0420 mean on a catalytic converter?

Here’s the official definition of a P0420 trouble code: P0420 Catalyst System Efficiency Below Threshold (Bank 1). What the code is telling you is that the catalytic converter has failed an efficiency test. In 99.5% of the cases, this code means that the catalytic converter itself is bad and must be replaced.

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