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P2421 Engine Trouble Code

Meaning of P2421 engine trouble code is a kind of powertrain trouble code and P2421 if your catalytic convertor fails completely, you eventually won't be able to keep the car running. Your gas mileage will also be terrible, so you should try and fix it as soon as you can. Unfortunately, the average replacement cost is around $2,140 and you can't do it yourself unless you're an experienced mechanic.

P2421 Fault Symptoms :

Check engine light comes on
Engine stalling or misfiring
Engine performance issues
Car not starting

If one of these reasons for P2421 code is occuring now you should check P2421 repair processes.
Now don't ask yourself; What should you do with P2421 code ?
The solution is here :

P2421 Possible Solution:

Power Steering Pressure (PSP) Switch Malfunction In Key On, Engine Off Self-Test, this DTC indicates the PSP input to the PCM is high. In Key On, Engine Running Self-Test, this DTC indicates that the PSP input did not change state. Steering wheel must be turned during Key On, Engine Running Self-Test PSP switch/shorting bar damaged SIG RTN circuit open PSP circuit open or shorted to SIGRTN PCM damaged.

P2421 Code Meaning :

P	2	4	2	1
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine	Fuel And Air Metering (Injector Circuit Malfunctions Only)	O2 Sensor Heater Circuit Malfunction	Turbocharger Boost Sensor A Circuit Low	Crankshaft Position Sensor A Circuit Low Input

The catalytic converter has an oxygen sensor in front and behind it. When the vehicle is warm and running in closed loop mode, the upstream oxygen sensor waveform reading should fluctuate.

P2421 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P2421 engine trouble code is about Crankshaft Position Sensor A Circuit Low Input.

Main reason For P2421 Code

The reason of P2421 OBD-II Engine Trouble Code is O2 Sensor Heater Circuit Malfunction.

P2421 DTC specifically refers to the camshaft (cam) timing. In this case, if the cam timing is over-retarded, the engine light will be illluminated and the code will be set.

	Example: 0140