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P2629 OBD2: O2 Sensor Pumping Current Trim Circuit/Open

P2629 OBD2: O2 Sensor Pumping Current Trim Circuit/Open (Bank 2 Sensor 1)

What Does the P2629 Code Mean?

The P2629 code is an OBD-II diagnostic trouble code that indicates an issue with the oxygen sensor pumping current trim circuit. This code is set when the Powertrain Control Module (PCM) detects a malfunction in the oxygen sensor or its circuit.

What Causes the P2629 Code?

Several factors can trigger the P2629 code, including:

  • Exhaust leak
  • Oxygen sensor failure
  • Powertrain Control Module (PCM) failure
  • Wiring issue

What Are the Symptoms of the P2629 Code?

Drivers may experience the following symptoms when the P2629 code is present:

  • Decreased engine performance
  • Increased fuel consumption

How Serious Is the P2629 Code?

The P2629 code has a moderate severity rating. While it may not immediately threaten the vehicle’s safety or functionality, it is essential to have it diagnosed within a reasonable time frame to ensure optimal vehicle performance.

How to Diagnose the P2629 Code

For accurate diagnosis of the P2629 code, follow these steps:

  1. Use an OBD-II scanner to confirm the presence of the P2629 code.
  2. Inspect the wiring and connections related to the oxygen sensor for any damage or disconnection.
  3. Check for exhaust leaks that may affect the oxygen sensor’s readings.
  4. Test the oxygen sensor’s functionality using a multimeter.
  5. If necessary, inspect the Powertrain Control Module (PCM) for faults.

Common Repairs for the P2629 Code

To address the P2629 code, the following repairs may be needed:

  • Oxygen Sensor Replacement

How Much Does It Cost to Fix the P2629 Code?

The cost to fix the P2629 code can vary widely based on the underlying issue. Generally, the price for oxygen sensor replacement can range from $100 to $300, including parts and labor.

Can I Fix the P2629 Code Myself?

While some experienced DIYers may be able to replace an oxygen sensor themselves, it is recommended to consult a professional mechanic for diagnosis and repair to avoid further complications.

About JC Landry

JC spent 15+ years as a certified Master Mechanic before trading the shop for the keyboard. He's worked across dealerships, owned and operated his own independent garage, and consulted on automotive trade school curricula, reviewing technical textbooks used in vocational programs. He now serves as Editor-in-Chief at eManualOnline.com, where he oversees the platform's technical content. He's one of the few voices in automotive publishing who has actually turned wrenches professionally on the vehicles he covers. He didn't learn automotive repair to write about it. He learned to write after spending over a decade doing it.

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