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P0172 Engine Code Repair

Meaning of P0172 engine trouble code is a kind of powertrain trouble code and P0172 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.

P0172 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 P0172 code is occuring now you should check P0172 repair processes.
Now don't ask yourself; What should you do with P0172 code ?
The solution is here :

P0172 Possible Solution:

P0172 Engine

Excessive air inflow can be caused by a vacuum leak, a dirty sensor or, an exhaust gas recirculation valve not closing properly. If the problem is not enough fuel, the culprit may be dirty injectors or fuel filters, a weak fuel pump or a leaky fuel pressure regulator. The lean fuel mix error may be accompanied by rough idling, engine misfires, hesitation during acceleration and overall poor engine performance.

P0172 Code Meaning :

P
OBD-II Diagnostic Powertrain (P) Trouble Code For Engine

0
Intake Valve Control Solenoid Circuit Low

1
Ambient Air Temperature Sensor Circuit Low

7
Cylinder 4 Contribution/Balance Fault

2
Crankshaft Position Sensor A Circuit Low Input

Is the fuel pump sometimes not priming when you turn the key to ON(II)? Start by measuring the fuel pressure and checking whether you have bright white-bluish spark at all four plugs. The mechanical timing is also something that you should check, as we mentioned above.

P0172 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P0172 OBD-II Trouble Code With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxyge P0172 code.

Main reason For P0172 Code

The reason of P0172 OBD-II Engine Trouble Code is Ambient Air Temperature Sensor Circuit Low.

P0172 the main thing to check is to verify the operation of the VCT solenoid. You're looking for a sticking or stuck VCt solenoid valve caused by contamination. Refer to vehicle specific repair manual to perform component tests for the VCT unit.