Description of DTC code P0236

As with naturally aspirated engines, engines equipped with turbochargers must have precise measurements of airflow, temperature and density to correctly calculate fuel injection and, in the case of gasoline engines, ignition time. For this reason, the ECM (Engine Control module) uses several sensors to perform these calculations constantly.

The actual pressure of the intake manifold is measured by the Manifold Absolute Pressure (MAP) sensor. If the ECM detects that the measured pressure is greater than the ordered pressure, the diagnostic code P0236 OBDII will be established. It should be noted that this code must be corrected as soon as possible, thus preventing future damage to the Catalytic Converter as well as risks of overfeeding.

Symptoms of fault code P0236

  • Fault Indicator Lamp (MIL)
  • Injection time and fuel quantity is limited.
  • Poor acceleration.
  • High temperature.
  • Excessive smoke expelled by exhaust.

Causes of OBD2 P0236

The causes of fault code P0236 OBD2 are:

  • There may be air leaks in the intake manifold or turbocharger.
  • Also, the vacuum supply may leak.
  • Vacuum lines may be clogged.
  • Faulty control solenoid.

Possible solutions of the DTC code P0236

To solve the problems caused by DTC code P0236 OBD2 you must do the following:

  • Check if there are Technical Service Bulletins (TSB) for your vehicle.
  • Perform an inspection of the vacuum lines, they may be bent or cracked. You should check all lines, not just those related to waste door control. Repair or replace as necessary.
  • Using a pressure gauge, check the vacuum on the inlet side of the control solenoid. If there is nothing, the vacuum pump is defective.
  • If vacuum is present, use a digital voltmeter that has the frequency adjustment function. Drive the vehicle and observe if there is a signal on the voltmeter, if this signal is present, the solenoid is defective, replace it.

Codes related to P0236

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