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P0243 – What Does It Mean and How To Fix It

This is one of the most frequent OBD2 trouble codes. Read the full article below to know what it means, how to fix it, and what other codes may show related to it.

Definition

P0243 is an OBD-II Code that refers to Turbocharger Wastegate Solenoid A Malfunction

Meaning

A P0243 code is a general diagnostic trouble code that occurs when the ECM/PCM detects a malfunction in the control and/or signal circuit of the valve that regulates the operation of the turbocharger wastegate. The Powertrain Control Module (PCM) regulates the boost pressure in a gasoline or diesel engine by managing the output to the circuit for the “A” wastegate/boost pressure control solenoid.

The PCM will set code P0243 when it detects an electrical failure in the control or signal circuit for the “A” wastegate/boost pressure control solenoid.

Causes

Common causes for this code include:

  • Malfunctioned Turbo Boost Control Solenoid Valve
  • Turbo Boost Control Solenoid Valve harness is open or shorted
  • Turbo Boost Control Solenoid Valve circuit poor electrical connection
  • Faulty Waste Gate
  • Bad PCM/ECM (rare)

Symptoms

The symptoms of a P0243 code are:

Diagnosis

To diagnose a P0243 DTC code, a technician would:

  1. Scan for codes in the ECM and look at the freeze frame data for failure.
  2. Visually inspect the electrical connectors and wiring for the turbocharger boost control solenoid
  3. Perform a resistance test of the turbocharger boost control solenoid
  4. Check for any blockages or restrictions in the air intake system or exhaust system
  5. Check for proper operation of the wastegate
  6. Test the PCM/ECM for proper operation

Common mistakes

The following are some of the most common mistakes that a technician may make when diagnosing a P0243 code:

  • Not thoroughly inspecting all the wiring and connectors for damage.
  • Not checking the operation of the wastegate.
  • Not testing the PCM/ECM for proper operation.

How serious is this?

A P0243 code is a fairly serious code, as it can cause a loss of power when needed. If the code is not fixed in a timely manner, it could cause further damage to the engine.

What repairs can fix the code?

The following are solutions that may fix this problem:

  • Broken or faulty wirings must be repaired or replaced
  • Restrictions or blockages in the air intake or exhaust systems must be removed
  • A faulty turbocharger boost control solenoid must be replaced
  • A faulty wastegate must be replaced
  • The PCM/ECM may need to be reset or replaced

Related codes

A P0243 is related to and may be accompanied by the following codes:

P0242 – Turbocharger Wastegate Solenoid B Malfunction

P0244 – Turbocharger Wastegate Solenoid C Malfunction

P0245 – Turbocharger Wastegate Solenoid D Malfunction

Conclusion

In conclusion, the P0243 code is a diagnostic trouble code that refers to a problem with the turbocharger wastegate solenoid. This code may be caused by a malfunction in the control or signal circuit of the valve that regulates the operation of the turbocharger wastegate, or by a faulty wastegate. If this code is not fixed in a timely manner, it could cause further damage to the engine.