Fix P2248: STEP-BY-STEP diagnostic GUIDE!

The P2248: O2 Sensor Reference Voltage Performance Bank 2 Sensor 1 code refers to a performance problem in the reference voltage circuit of the oxygen (O2) sensor for Bank 2 Sensor 1. This issue may arise due to improper voltage levels or fluctuations, potentially caused by calibration problems, wiring issues, or connector faults. Such performance issues can prevent the O2 sensor from accurately monitoring the oxygen levels in the exhaust gases, which affects engine efficiency and emissions control.

P2248 – Quick Overview

CodeInformation
MeaningP2248: O2 Sensor Reference Voltage Performance Bank 2 Sensor 1
Is it serious?Yes, as performance issues in the reference voltage can lead to incorrect air-fuel mixture control, affecting fuel efficiency and increasing emissions.
Possible causes– Performance issues with O2 sensor reference voltage for Bank 2 Sensor 1
– Calibration problems
– Wiring or connector issues
How to diagnose?– Test the performance of the O2 sensor reference voltage for Bank 2 Sensor 1
– Check for calibration issues
– Inspect wiring and connectors for faults

P2248 Meaning

The P2248: O2 Sensor Reference Voltage Performance Bank 2 Sensor 1 code indicates that there is an issue with the reference voltage provided to the O2 sensor in Bank 2 Sensor 1, resulting in a performance problem. This voltage is essential for the sensor to function correctly. If it is unstable, too high, or too low, it can prevent the sensor from providing accurate oxygen level readings. This, in turn, affects the ECU’s ability to correctly adjust the air-fuel mixture, leading to reduced efficiency and increased emissions.

Step-by-step diagnostic guide

ActionDescriptionTools Needed
Check for Other CodesUse an OBD-II scanner to check if there are any other related codes present. Additional codes could provide context on whether this issue is isolated or related to a broader problem.OBD-II Scanner
Test the Performance of the O2 Sensor Reference VoltageUse a multimeter to measure the reference voltage of Bank 2 Sensor 1. Compare the voltage levels with the manufacturer’s specifications to ensure they are within the acceptable range. Look for any fluctuations that might indicate a performance issue.Multimeter, Vehicle Service Manual
Check for Calibration IssuesUse a diagnostic scanner to verify if the O2 sensor calibration is correct. Sometimes the sensor may require recalibration, especially if there have been recent software updates or repairs. Perform a recalibration if necessary to restore optimal sensor performance.Diagnostic Scanner, Calibration Tool
Inspect Wiring and Connectors for FaultsVisually inspect the wiring and connectors for Bank 2 Sensor 1. Look for broken wires, loose connections, corrosion, or any visible damage that might cause instability in the reference voltage. Repair or replace any faulty wiring or connectors as needed.Flashlight, Safety Gloves
Inspect Sensor Connector ConditionExamine the sensor connector for bent pins, poor contact, or signs of corrosion. Securely attach the connector to ensure proper contact, as poor connections can affect the performance of the reference voltage.Flashlight
Clear the Code and Test DriveAfter completing the necessary repairs, use an OBD-II scanner to clear the P2248 code. Conduct a test drive to monitor the sensor’s performance and verify that the reference voltage levels are stable and the issue has been resolved.OBD-II Scanner, Vehicle Owner’s Manual
Recheck for CodesAfter the test drive, re-scan the vehicle to ensure that the P2248 code has not returned. If the issue persists, further diagnostics will be required to identify underlying problems with the O2 sensor or circuit.OBD-II Scanner
Bluetooth OBD-II scanners

OBD-II scanner Buyer’s Guide

  • Scanner features explained
  • Different types of scanners
  • Scanners for coding/odometer/ECU/checks
  • Best picks + discount codes

Download PDF FREE

    Leave a Comment