BMW DTC P2629 – O2 Sensor Pumping Current Trim Circuit/Open (Bank 2 Sensor 1)
DTC P2629 meaning on BMW
DTC P2629 on a BMW indicates an issue with the O2 Sensor Pumping Current Trim Circuit for Bank 2 Sensor 1. This fault code specifically points to an open circuit in the sensor’s pumping current trim circuit, which can affect the sensor’s ability to accurately measure the oxygen content in the exhaust gases.
BMW DTC P2629 symptoms
Symptoms of DTC P2629 on a BMW may include poor engine performance, decreased fuel efficiency, rough idling, and potentially an illuminated Check Engine Light on the dashboard. Additionally, the vehicle may fail emissions tests due to improper oxygen sensor readings.
BMW DTC P2629 causes
The most common causes of DTC P2629 on a BMW include a faulty O2 sensor, damaged wiring or connectors in the sensor circuit, or a malfunctioning engine control module (ECM). Environmental factors such as exposure to extreme heat or contaminants can also contribute to this issue.
BMW DTC P2629 seriousness
While DTC P2629 may not cause immediate drivability issues, it is important to address this fault code promptly to prevent potential long-term damage to the vehicle’s engine and emissions system. Ignoring this fault can lead to decreased fuel efficiency and increased emissions output.
How to diagnose DTC P2629 on BMW
To diagnose DTC P2629 on a BMW, a mechanic would typically start by using a diagnostic scanner to retrieve the specific fault code and related data. They would then inspect the O2 sensor and its wiring for any visible damage or corrosion. Testing the sensor’s output using a multimeter and checking the ECM for proper operation would also be part of the diagnostic process.
How to fix DTC P2629 on BMW
Fixing DTC P2629 on a BMW may involve replacing the faulty O2 sensor, repairing any damaged wiring or connectors in the sensor circuit, or reprogramming the ECM if necessary. It is crucial to use OEM parts and follow manufacturer guidelines during the repair process to ensure proper functionality.
How to erase DTC P2629 on BMW
Once the underlying issue causing DTC P2629 on a BMW has been resolved, the fault code can be cleared using a diagnostic scanner. By accessing the vehicle’s ECM and selecting the option to clear codes, the DTC P2629 should be erased from the system. It is important to verify that the issue has been successfully addressed before clearing the fault code.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.