Skip the auto shop - Our mechanics make house calls

Q: Emission and Suspension

asked by on

Emission: I had a catalytic fail code P0430 My mechanic put some type of cleanser in the tank and turned off the code approx 3-months ago. I would like to know exactly what the cleanser did to the CAT and if it is a temporary fix so I can be prepared if I need to purchase a CAT.>

Suspension: I would also like to address another problem. My back end wobbles from side to side when I hit a bump I have had it check for sway-bar, shocks, and was told I did not need them. I also put new tires on the car and had a 4-wheel alignment which seems to have made it a little worse. Can you tell me if there is something else I could have checked?

Thank you for your help

My car has 153350 miles.
My car has an automatic transmission.

A: Hello. To address the converter, there is n...

Hello. To address the converter, there is no cure for a failing converter. In many cases, these cleaners will clean out some of the build up in the converter but definitely not all of it. You will end up needing to purchase one over time.

As for how long that will be, it is hard to tell. As for the rear end, the most common cause of this is bad struts. The rear struts will fail causing the rear suspension to sway back and forth due to the coil springs not being under control. If the rest of the bushings look fine then this is the problem. If you want to have your catalytic converter and struts replaced, consider YourMechanic, as a certified mechanic can come to your home or office to perform these services.

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: Truck stutters when climbing long inclines

The motor is probably shot. It sounds as though the head gasket is blown, allowing coolant into the engine; when that happens, all you can do is replace the engine or rebuild it. I would recommend taking it to a...

Q: Car won't pass smog due to computer code P0420 - 2006 Volkswagen Rabbit

This code is related to the catalytic converter. As you may know, the catalytic converter is a section of your exhaust system that helps to complete the combustion process when excess unburnt fuel gases pass through the exhaust. Due to...

Q: Changed catalytic converter, no lights on dashboard, but codes for catalytic converter & O2 sensor still remain

Hello. If you have changed these parts and if the check engine light is not on but the codes remain then you should drive the vehicle for a while. it can take about 500 miles for them to clear. If...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...