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P2272 OBD2: O2 Sensor Signal Biased/Stuck Lean

P2272 OBD2: O2 Sensor Signal Biased/Stuck Lean (Bank 2 Sensor 2)

What Does the P2272 Code Mean?

OBD-II Code P2272 is defined as an O2 Sensor Signal Biased/Stuck Lean. This means that the oxygen sensor, which measures the amount of oxygen in the exhaust, is not functioning within its expected parameters.

What Causes the P2272 Code?

The P2272 code can be triggered by several factors, including:

  • Oxygen sensor failure
  • Powertrain Control Module (PCM) failure
  • Vacuum leaks in the intake system
  • Wiring issues or poor connections

What Are the Symptoms of the P2272 Code?

When the P2272 code is present, drivers may notice several symptoms:

  • Decreased engine performance
  • Increased fuel consumption

How Serious Is the P2272 Code?

The severity of the P2272 code is moderate. While it may not pose an immediate threat to the vehicle’s safety or functionality, it is important to have it diagnosed within a reasonable timeframe to avoid more serious issues.

How to Diagnose the P2272 Code

  • Use an OBD-II scanner to confirm the code
  • Inspect the oxygen sensor and its wiring
  • Check for vacuum leaks
  • Test the PCM functionality

Common Repairs for the P2272 Code

If the P2272 code is confirmed, common repairs may include:

  • Oxygen sensor replacement

How Much Does It Cost to Fix the P2272 Code?

The cost to fix the P2272 code can vary based on the specific repair needed. Typically, oxygen sensor replacement can range from $100 to $300, depending on the make and model of the vehicle and labor costs.

Can I Fix the P2272 Code Myself?

While some vehicle owners may choose to attempt repairs themselves, it is advisable to have the P2272 code diagnosed and repaired by a professional mechanic. This ensures that the underlying issue is properly addressed, preventing further complications.

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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