Q: Will not accelarate over 20mph and has a P0430 code

asked by on

I had a P0430 code when I ran a diagnostic test. Would this code make my truck not be able to accelerate over 20mph?

My car has 190000 miles.
My car has an automatic transmission.

Hello.

P0430 is the trouble code for catalyst efficiency below threshold, for bank 2. The computer closely monitors the vehicle’s catalytic converter efficiency, and will set off this code if it detects that the converter is not reducing emissions as it should. This is commonly caused by a faulty catalytic converter, an exhaust leak, a bad oxygen sensor, or in serious cases engine mechanical damage. In most cases the issue should not greatly reduce engine performance, so if the vehicle’s power and speed is greatly reduced then it may be possible that the issue is serious. It may be possible that the issues are related, however a proper diagnosis by a certified mechanic, like one from YourMechanic, would be required to determine if that is the case.

Regards,

Eduardo YourMechanic

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Will not accelarate over 20mph and has a P0430 code

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: Q: Code p0421

Are there other codes set? This code, by itself, P0421 indicates that the engine management system detected the catalytic converter is performing below expected standards. This means the engine is sending contaminants (unburned fuel, oil fumes, etc.) down the exhaust,...

Q: Car wont move even in neutral.

Pull up on the parking brake to see if the brake feels loose like the cable has stuck on. Your brakes may have moisture in the brake fluid and it may have froze inside the brakes locking them on. You...

Q: Rumbling when coasting - 2007 Chevrolet Trailblazer

Hello. A wheel bearing going bad will definitely cause a rumbling or droning sound as you describe. This will generally get worse as you accelerate as more force is exerted on the bearing and it is caused to turn faster....

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...