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P3420 Engine Trouble Code

Meaning of P3420 engine trouble code is a kind of powertrain trouble code and P3420 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.

P3420 Fault Symptoms :

  1. Check engine light comes on
  2. Engine stalling or misfiring
  3. Engine performance issues
  4. Car not starting
If one of these reasons for P3420 code is occuring now you should check P3420 repair processes.
Now don't ask yourself; What should you do with P3420 code ?
The solution is here :

P3420 Possible Solution:

P3420 Engine

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.

P3420 Code Meaning :

P 3 4 2 0
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine Ignition System Or Misfire O2 Sensor Heater Circuit Malfunction Turbocharger Boost Sensor A Circuit Low Shift Solenoid E Performance or Stuck Off

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.

P3420 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P3420 engine trouble code is about Shift Solenoid E Performance or Stuck Off.

Main reason For P3420 Code

The reason of P3420 OBD-II Engine Trouble Code is O2 Sensor Heater Circuit Malfunction.

P3420 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.