AutoCodes – Ford – P2245 Ford

P2245 Ford Code - O2 Sensor Reference Voltage Circuit Low Bank 1 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 1, Front Oxygen Sensor Bank 1 harness is open or shorted, Front 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: P2245 Ford indicates O2 Sensor Reference Voltage Circuit Low Bank 1 Sensor 1.
Common causes: Common causes include Faulty Front Oxygen Sensor Bank 1, Front Oxygen Sensor Bank 1 harness is open or shorted, Front 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 2,167

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 P2245 Ford 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 P2245 Ford - O2 Sensor Reference Voltage Circuit Low Bank 1 Sensor 1 - AutoCodes.com — P2245 Ford Code - O2 Sensor Reference Voltage Circuit Low Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P2245 Ford?

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

How to Fix the DTC P2245 Ford?

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 P2245 Ford 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 P2245 Ford Code

1. What does the OBDII code P2245 mean on a Ford vehicle?

P2245 indicates an issue with the O2 sensor reference voltage circuit for Bank 1 Sensor 1, specifically that the voltage is lower than expected.

2. What are the common symptoms of a P2245 code?

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

3. What causes the P2245 code on a Ford?

Common causes include a faulty oxygen sensor, damaged wiring or connectors in the circuit, a malfunctioning powertrain control module (PCM), or corrosion in the electrical connections.

4. Which sensor is affected by the P2245 code?

Bank 1 Sensor 1 refers to the upstream oxygen sensor located before the catalytic converter on the side of the engine with cylinder 1.

5. Is it safe to drive with a P2245 code?

Driving with this code is generally not recommended as it may lead to reduced engine performance, higher emissions, and potential damage to the catalytic converter.

6. How do I diagnose a P2245 code?

Diagnosis involves inspecting the oxygen sensor and wiring for damage, testing the reference voltage with a multimeter, and using a scan tool to monitor sensor data.

7. Can a P2245 code be caused by a bad PCM?

While rare, a malfunctioning PCM can cause the P2245 code if it fails to provide the correct reference voltage to the oxygen sensor.

8. How do I fix the P2245 code on my Ford?

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

9. How much does it cost to fix a P2245 code?

The cost can vary, but replacing an oxygen sensor typically costs $150–$300, while wiring repairs or PCM replacement may be more expensive depending on the extent of the issue.

10. Can a vacuum leak cause the P2245 code?

A vacuum leak is unlikely to directly cause P2245, but it could affect engine performance and sensor readings, potentially contributing to related issues.