AutoCodes – Lincoln – P2243 Lincoln

P2243 Lincoln Code - O2 Sensor Reference Voltage Circuit Open Bank 1 Sensor 1

Quick Answer

The Front Heated Oxygen Sensor (or O2 sensor 1) is placed into the exhaust manifold. Common causes include Faulty Front Heated Oxygen Sensor Bank 1, Front Heated Oxygen Sensor Bank 1 harness is open or shorted, Front Heated Oxygen Sensor Bank 1 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: P2243 Lincoln indicates O2 Sensor Reference Voltage Circuit Open Bank 1 Sensor 1.
Common causes: Common causes include Faulty Front Heated Oxygen Sensor Bank 1, Front Heated Oxygen Sensor Bank 1 harness is open or shorted, Front Heated Oxygen Sensor Bank 1 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 2,100

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 Dec 28, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2243 Lincoln Description

The Front Heated Oxygen Sensor (or 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 Powertrain Control Module (PCM) monitors the universal heated oxygen sensor (HO2S) for a circuit concern. This Diagnostic Trouble Code (DTC) sets when the PCM detects a concern with the circuit used to determine the oxygen content in the exhaust gas.

OBDII Code P2243 Lincoln - O2 Sensor Reference Voltage Circuit Open Bank 1 Sensor 1 - AutoCodes.com — P2243 Lincoln Code - O2 Sensor Reference Voltage Circuit Open Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P2243 Lincoln?

Faulty Front Heated Oxygen Sensor Bank 1
Front Heated Oxygen Sensor Bank 1 harness is open or shorted
Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection

How to Fix the DTC P2243 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 P2243 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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Need more information on how to fix the P2243 Lincoln code? Get Access to Factory Service Manuals

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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 P2243 Lincoln Code

What does the OBDII code P2243 mean for a Lincoln vehicle?

P2243 indicates an "O2 Sensor Reference Voltage Circuit Open" issue for Bank 1, Sensor 1. This means the vehicle's engine control module (ECM) has detected a problem with the reference voltage circuit for the upstream oxygen sensor on Bank 1.

What are common symptoms of the P2243 code on a Lincoln?

Symptoms may include the check engine light turning on, poor fuel economy, rough idling, hesitation or stalling, and increased exhaust emissions.

What causes the P2243 code to appear on a Lincoln?

Possible causes include a damaged or faulty oxygen sensor, an open or short in the reference voltage circuit wiring, a corroded or loose electrical connector, or a malfunctioning ECM.

How do I diagnose the P2243 code on a Lincoln?

Start by scanning the vehicle with an OBDII scanner, checking the oxygen sensor's wiring and connectors for damage or corrosion, and testing the reference voltage circuit with a multimeter.

Can I drive my Lincoln with the P2243 code active?

Driving with this code is not recommended, as it can lead to poor engine performance, higher emissions, and potential damage to the catalytic converter if left unresolved.

How do I fix the P2243 code on my Lincoln?

Repairs may include replacing the oxygen sensor, repairing or replacing damaged wiring, cleaning or securing connectors, or reprogramming or replacing the ECM if necessary.

How much does it cost to fix the P2243 code on a Lincoln?

Repair costs can range from $100 to $400 depending on whether the oxygen sensor, wiring, or ECM needs to be repaired or replaced.

Can a dirty oxygen sensor cause the P2243 code?

While a dirty oxygen sensor can cause performance issues, the P2243 code specifically points to an open circuit in the reference voltage, so cleaning the sensor alone may not resolve the issue.

Is the P2243 code specific to Lincoln vehicles?

No, the P2243 code is a generic OBDII code applicable to all OBDII-equipped vehicles, but the exact repair steps and symptoms can vary by make and model, including Lincoln.

What tools do I need to fix the P2243 code on my Lincoln?

Common tools include an OBDII scanner, a multimeter for testing circuits, basic hand tools for sensor replacement, and possibly a wiring diagram for your vehicle.