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P012E OBD2: Turbocharger/Supercharger Inlet Pressure Sensor Circuit

P012E OBD2: Turbocharger/Supercharger Inlet Pressure Sensor Circuit

What Does the P012E Code Mean?

The P012E code indicates a problem with the Turbocharger or Supercharger inlet pressure sensor circuit. This sensor plays a critical role by informing the engine control module (PCM) about the amount of air being forced into the engine. When the PCM detects an incorrect signal from this sensor, it triggers the P012E code.

What Causes the P012E Code?

Several issues can lead to the P012E code, including:

  • Inlet pressure sensor failure
  • Powertrain Control Module (PCM) failure
  • Wiring issues associated with the sensor

What Are the Symptoms of the P012E Code?

Symptoms associated with the P012E code can include:

  • Engine entering limp home mode, resulting in reduced performance
  • Lack of boost from the turbocharger or supercharger

How Serious Is the P012E Code?

The P012E code is considered to have moderate severity. While it does not pose an immediate threat to the vehicle’s safety or functionality, it is advisable to get it diagnosed within a reasonable time frame to prevent further issues.

How to Diagnose the P012E Code

Proper diagnosis of the P012E code typically involves the following steps:

  1. Using a diagnostic scanner to confirm the presence of the P012E code.
  2. Inspecting the inlet pressure sensor and its wiring for any visible damage.
  3. Testing the inlet pressure sensor using a multimeter to ensure it is functioning correctly.
  4. Checking the PCM for any faults.

Common Repairs for the P012E Code

Common repairs to resolve the P012E code may include:

  • Replacing a faulty inlet pressure sensor
  • Repairing or replacing damaged wiring or connectors
  • Replacing the Powertrain Control Module (PCM) if it is found to be faulty

How Much Does It Cost to Fix the P012E Code?

The cost to fix the P012E code can vary significantly depending on the underlying issue. Simple repairs such as replacing the inlet pressure sensor may range from $100 to $300, while more complex repairs involving the PCM can exceed $1,000.

Can I Fix the P012E Code Myself?

Fixing the P012E code yourself is possible if you have a good understanding of automotive systems and the necessary tools. However, diagnosing and repairing issues with the PCM or electrical systems may require professional expertise.

About JC Landry

JC is the Senior Editor at eManualOnline.com, GarageSpot.com, and Drive-My.com, as well as the Webmaster of TheMechanicDoctor.com, only to name a few. He's been a certified Master Mechanic for 15 years, working for various car dealers and specialized repair shops before turning towards blogging about cars and EVs in the hope of helping the next generation of automotive technicians. He also loves cats, Johnny Cash and Subarus.

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