What should I do if my Suzuki Alto fails an emissions test?

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What should I do if my Suzuki Alto fails an emissions test?

If your Suzuki Alto fails an emissions test, what common problems could be responsible, and what steps can you take to ensure the car passes the next inspection?

Gari Specialist asked on 14 Feb 2025 12:54:01 pm

1 Answer

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Gari Master - on 14 Feb 2025 12:59:45 pm

Failing an emissions test is often due to problems in the emission control system:

Faulty Catalytic Converter: The catalytic converter reduces harmful gases in the exhaust. If it is damaged o r clogged, it can cause higher emissions.
Faulty Oxygen Sensor: An oxygen sensor that isn’t working properly can give incorrect readings to the engine control unit ECU, leading to a rich fuel mixture and high emissions.
Loose o r Damaged Hoses: Cracks o r loose hoses in the exhaust system can allow air to mix improperly, leading to higher emissions.
Worn-out EGR Valve o r Air Filter: A clogged air filter o r malfunctioning EGR valve can cause incomplete combustion, resulting in failed emissions.
Solution: Start by having the catalytic converter, oxygen sensors, and EGR valve checked. Ensure that the air filter is clean and the exhaust system is intact. A mechanic can also perform diagnostic tests to pinpoint the exact issue causing the high emissions.