Skip the auto shop - Our mechanics make house calls

Q: High CO2 emissions on a '98 Mitsubishi Carisma

asked by on

I have a Mitsubishi Carisma 1.8 GDI from '98. The CO2 emissions are really high. Is it because of the direct fuel injection system or maybe the catalyst?

Often it’s a GDI because they carbon up the engines over time. Pay a mechanic to carbon clean the entire engine. Then you’d want to pray that the cat hasn’t been ruined. It may already be ruined. It’s a ’98 so it’s really old. Have the engine carbon cleaned first. Start there. Still, you might need a new catalytic converter because of the age. It had been throwing oil in the engine and carbon’ing up. If it clogged up the catalytic converter with carbon, it needs a replacement. If you want to have this looked at by a certified technician, a certified mechanic from YourMechanic can inspect your vehicle and replace your catalytic converter for you if necessary.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car will not move forward 1998 Toyota Camry

Hi there - the symptoms suggest a failed forward drum/clutch pack, since you still have reverse function. Check fluid level and quality (pink, semi-clear and doesn't smell burned), but it is unlikely to be a "simple" fix. I recommend a...

Q: I took out the spark plugs that were wet of gas and I put in new ones. Truck starts right up runs for a few blocks and then starts chugging.

Hi there. Check the fuel injectors and see if they are leaking or if there is debris in the nozzle. A leaking injector will cause the spark plugs to be wet and make the engine chug. If you need further...

Q: thumping sound from rear

Charcoal canisters don't become clogged, although in exceptional cases, they can become saturated with liquid fuel which ruins their ability to store fuel vapors. If the premature shut of the refueling nozzle is occasional that is not an issue but...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...