All About Two Wheeler Emissions Test In India

Emission Test for Two Wheeler
Pollution/Emission Test for Two Wheelers

Any two-wheeler running on the Indian roads without having a valid PUC certificate will be fined Rs.1,000 for the first offence and Rs.2,000 for subsequent offences. For obtaining a PUC certificate a two-wheeler must undergo an emission test. Vehicles that meet the pollution control standards are granted with a PUC certificate.

  • A PUC certificate is one of the vital legal documents that every two-wheeler owner must have.
  • You will have to carry the certificate while riding on your two-wheeler on the Indian roads.
  • Uniformed traffic police may stop you anytime to check if you have a valid PUC certificate.
  • In case of failure to show the certificate when asked for while driving you will be fined heavily.
  • Vehicles not having a PUC certificate can’t be insured as per the Supreme Court guidelines.

What is a two-wheeler emission test?

While running on the roads, two-wheelers emit a lot of harmful smokes, which if not kept under control can badly pollute the environment. Emission tests are conducted to measure whether the toxic gases emitted from a vehicle is under the prescribed limit or not. During the test, the professionals check the amount of CO in percent and other hydrocarbons in ppm against the prescribed criteria. To ensure that the pollutants emitted from the vehicles on road don’t surpass the maximum limit.

After a two-wheeler passes the emission test, the owner is issued with a Pollution Under Control certificate. All the two-wheeler riders in India should carry this mandatory legal document while driving their vehicles as per the Indian Motor Vehicle rules.

The PUC Certificate mentions the serial number of the certificate, vehicle license plate number, the date of testing, the date of expiry, emission readings, and more. In some states in India, the regulations also make it mandatory to furnish a PUC certificate at the time of two wheeler insurance renewal.

What information does a PUC certificate provide?

PUC is the mark of certification that your two-wheeler has undergone an emission test and passed it successfully. It contains the following vital information:

  • The license plate number of the two-wheeler
  • The serial number of the PUC certificate
  • The date when the two-wheeler was tested
  • The date when the two-wheeler was tested
  • The date of expiry of the PUC Certificate

Two-wheeler emission test criteria:

Two-wheelers undergoing an emission test should meet the following standard carbon and hydrocarbon emissions criteria to successfully clear the test:

Vehicle Type Percentage of CO Hydrocarbon parts per million (ppm)
Two-wheelers and three-wheelers manufactured on or before 31 March 2000 (2 or 4 stroke) 4.5 9,000
Two-wheelers manufactured after 31 March 2000 (2 stroke) 3.5 6,000
Two-wheelers and three-wheelers manufactured after 31st March 2000 (4 stroke) 3.5 4,500

Cost of a two-wheeler emission test:

The cost of conducting an emission test is nominal. It may range between Rs.60 to Rs.100 depending on the two-wheeler that is being tested and the type of fuel it uses.

Emission test procedure:

In the course of an emission test, the amount of carbon monoxide and parts of hydrocarbons released per million is checked to assess whether it is within the permitted emission standards or not. Bikes and scooters which successfully pass an emission test are granted with PUC certificates right at the test location.

Before starting the emission test, if required the testing centre will prepare the vehicle for the same. For testing the exhaust emissions of diesel vehicles, the accelerator of the two-wheeler is completely pressed, and the readings of pollution levels are carefully observed. The process is repeated for five times, known as test cycles, and the average of all the readings is computed to get the final reading. In the case of petrol vehicles, while measuring the emissions the two-wheeler is kept in idle mode without pressing the accelerator and the emission values are recorded. Only one reading is taken and this is considered to be the final reading.

During the test, if the two-wheeler is found to release higher levels of emission (carbon and hydrocarbons) than the permitted limits, the testing centre reports the registration number of the vehicle to the RTO, Deputy RTO, or Assistant RTO within 24 hours.

Emission test certification:

After a two-wheeler successfully pass the emission test, it is granted with an authorised certification in the form of a Pollution Under Control (PUC) certificate. This document certifies that the emissions passed from the vehicle are under control and in compliance with the standard pollution control norms and will not cause any damage to the environment.

PUC certificate validity:

  • The PUC certificate for a two-wheeler remains valid for a period of 1 year from the date of vehicle registration when issued for the first time.
  • After the expiry date of the first certificate, two-wheeler owners have to undergo the emission test once in every 6 months (twice in a year) and get a fresh certificate issued every time. The validity of the new PUC certificate is 6 months, unless any adverse reading is observed in the emission test.
  • If the emission test of a two-wheeler exhibits negative readings, the validity of the PUC certificate is decided on the basis of the observations.

Tips to prepare your two-wheeler for passing an emission test:

The main purpose of an emission test is to keep the air clean and ensure that your vehicle is in the right condition to reduce pollution. Hence, it is important to prepare your two-wheeler before taking it for an emission test. Here are a few tips to prepare your scooter/bike for passing an emission test successfully:

  • Warm up your two-wheeler’s engine: A warm engine tends to run cleaner than a cold engine and burns a greater number of hydrocarbons. Thus, warm up the engine to the maximum by riding around in your two-wheeler at least twenty minutes prior to the test. Make an appointment with the testing centre to avoid waiting in long queues as that might lead the engine to turn off and cool down before the test.
  • Pour a special fuel additive: Higher percentage of carbon emission can cause your vehicle to fail the test. Use a specialised fuel additive to clean the carbon deposits present in the combustion chamber and exhaust of the vehicle. This improves combustion and lowers the level of toxic emissions.
  • Tune up your vehicle: Check the air filter, spark plugs, engine oil, oil filter etc. and see if anything needs to be cleaned, repaired, or replaced. Ensure that the components are in functional state during the test. If any of the electric components of the engine are not working properly then your vehicle will not be able to burn fuel effectively leading to increased accumulation of pollutants in the exhaust.
  • Check for gas cap leakage: A leaking gas cap can be the reason of your vehicle failing an emission test. Check for any gas leak and if there is any replace it with one that properly seals the tank.
  • Examine the ‘Check Engine’ light: If the ‘’Check Engine" light remains illuminated during the emission test it may lead to a failure. The ‘Check Engine Light’ notifies whenever there is any engine-related problem that could affect vehicle emissions. Hence, if your engine light is on then either there is a problem in your engine, or the light has malfunctioned. In such cases, take it to a repair centre and fix the cause of malfunctioning. Alternately, you can turn off the light for a short time before the test.
  • Change engine oil: There are chances of carbon building up in the engine oil as a result of contamination and this may lead to higher emissions during the test. Hence, before the test consider changing the engine oil to ensure a cleaner combustion.
  • Inflate tyres to the maximum: Inflate the tyres of your two-wheeler before the test as slightly higher air pressure will help the engine make the tyres spin effortlessly. This puts less stress on the engine allowing it to run cleaner at a given speed resulting in the release of fewer hydro carbons.
  • Get the vehicle inspected: Before taking your two-wheeler for an emission test, get it inspected by a professional motor mechanic. This will help you to know which parts need to be repaired or replaced.

After you successfully get your two-wheeler tested from an emission testing centre and obtain a PUC certificate make sure to have it along with while the vehicle is on the road. If someone else is riding your vehicle instead of you then also it should be in possession of the person. You must also ensure that the PUC certificate is not expired. After it expires, immediately get the emission test done at the nearest petrol station or any independent centre and obtain a new certificate before hitting the road.

News About All About Two Wheeler Emissions Test In India

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