AutoCodes – Lincoln – P2248 Lincoln

P2248 Lincoln Code - O2 Sensor Reference Voltage Performance Bank 2 Sensor 1

Quick Answer

The Front Oxygen Sensor (O2 Sensor 1) is placed into the exhaust manifold. Common causes include Faulty Front Oxygen Sensor Bank 2, Front Oxygen Sensor Bank 2 harness is open or shorted, Front Oxygen Sensor Bank 2 circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P2248 Lincoln indicates O2 Sensor Reference Voltage Performance Bank 2 Sensor 1.
Common causes: Common causes include Faulty Front Oxygen Sensor Bank 2, Front Oxygen Sensor Bank 2 harness is open or shorted, Front Oxygen Sensor Bank 2 circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 1,235

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2248 Lincoln Description

The Front Oxygen Sensor (O2 Sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.

OBDII Code P2248 Lincoln - O2 Sensor Reference Voltage Performance Bank 2 Sensor 1 - AutoCodes.com — P2248 Lincoln Code - O2 Sensor Reference Voltage Performance Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P2248 Lincoln?

Faulty Front Oxygen Sensor Bank 2
Front Oxygen Sensor Bank 2 harness is open or shorted
Front Oxygen Sensor Bank 2 circuit poor electrical connection

How to Fix the DTC P2248 Lincoln?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2248 Lincoln code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2248 Lincoln Code

What does OBDII code P2248 mean on a Lincoln?

Code P2248 indicates an issue with the O2 sensor reference voltage performance for Bank 2 Sensor 1, meaning the voltage signal is outside the expected range.

What are the symptoms of code P2248 in a Lincoln?

Common symptoms include poor fuel economy, rough idling, hesitation during acceleration, and the check engine light being illuminated.

What causes the P2248 code to appear in a Lincoln?

Potential causes include a faulty oxygen sensor, damaged wiring or connectors, a malfunctioning powertrain control module (PCM), or an exhaust leak near the sensor.

Which oxygen sensor is involved in the P2248 code?

The code refers to Bank 2 Sensor 1, which is the upstream oxygen sensor on the side of the engine opposite Cylinder 1.

Can I drive my Lincoln with the P2248 code active?

Driving with this code is not recommended because it can lead to poor engine performance and increased emissions. Prompt diagnosis and repair are advised.

How do I diagnose the P2248 code on a Lincoln?

Diagnosis involves checking the O2 sensor wiring and connectors for damage, testing the sensor’s reference voltage, and inspecting for exhaust leaks near Bank 2 Sensor 1.

How do I fix the P2248 code on my Lincoln?

Repairs may include replacing the faulty oxygen sensor, repairing damaged wiring, fixing exhaust leaks, or reprogramming or replacing the PCM if necessary.

Is replacing the oxygen sensor the only solution for code P2248?

No, while a faulty sensor is a common cause, the issue could also stem from damaged wiring, exhaust leaks, or problems with the PCM.

What tools are needed to repair the P2248 code on a Lincoln?

You may need an OBDII scanner, a multimeter for voltage testing, and basic hand tools for removing and replacing the oxygen sensor.

How much does it cost to fix the P2248 code on a Lincoln?

Repair costs vary, but replacing an oxygen sensor typically costs $100-$300, while addressing wiring or PCM issues may cost more depending on labor and parts.