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P0166 Engine Trouble Code

Meaning of P0166 engine trouble code is a kind of powertrain trouble code and P0166 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 $2,000 and you can't do it yourself unless you're an experienced mechanic.

P0166 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 P0166 code is occuring now you should check P0166 repair processes.
Now don't ask yourself; What should you do with P0166 code ?
The solution is here :

P0166 Possible Solution:

P0166 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.

P0166 Code Meaning :

P 0 1 6 6
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine Intake Valve Control Solenoid Circuit Low Fuel Rail/System Pressure - Too High Cylinder 4 Contribution/Balance Fault Ignition Coil A Primary/Secondary Circuit Malfunction

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.

P0166 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P0166 OBD-II Trouble Code The rear heated oxygen sensor (or sensor 3 for some vehicles), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Even if switching characteristics of the P0166 code.

Main reason For P0166 Code

The reason of P0166 OBD-II Engine Trouble Code is Fuel Rail/System Pressure - Too High.

P0166 code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.