AutoCodes – Dodge – P2237 Dodge

P2237 Dodge Code - Oxygen Sensor Positive Current Control Circuit Open Bank 1 Sensor 1

Quick Answer

The Front Oxygen Sensor (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: P2237 Dodge indicates Oxygen Sensor Positive Current Control 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 6,515

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 May 20, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2237 Dodge 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 P2237 Dodge - Oxygen Sensor Positive Current Control Circuit Open Bank 1 Sensor 1 - AutoCodes.com — P2237 Dodge Code - Oxygen Sensor Positive Current Control Circuit Open Bank 1 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P2237 Dodge?

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 P2237 Dodge?

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 P2237 Dodge 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 P2237 Dodge Code

What does the OBDII code P2237 mean for a Dodge vehicle?

P2237 indicates an issue with the Oxygen Sensor Positive Current Control Circuit Open for Bank 1 Sensor 1. This means the engine control module (ECM) has detected an open circuit in the oxygen sensor's current control system.

What are the symptoms of code P2237 in a Dodge?

Common symptoms include the check engine light turning on, reduced fuel efficiency, rough idling, engine misfires, and poor overall performance.

What causes the P2237 code to appear?

Possible causes include a faulty oxygen sensor, damaged wiring or connectors in the oxygen sensor circuit, a malfunctioning ECM, or excessive corrosion on electrical components.

How can I diagnose the P2237 code on my Dodge?

Start by using a scan tool to confirm the code, then inspect the wiring and connectors for damage or corrosion. Test the oxygen sensor and its circuit for continuity and proper voltage.

Can I continue driving my Dodge with the P2237 code?

Driving with this code is not recommended, as it can lead to poor fuel economy, increased emissions, and potential engine damage if left unresolved.

How do I fix the P2237 code on a Dodge?

Repairs may include replacing the oxygen sensor, repairing or replacing damaged wiring or connectors, and, in rare cases, reprogramming or replacing the ECM.

How much does it cost to fix the P2237 code on a Dodge?

Repair costs vary but typically range from $150 to $400, depending on whether the oxygen sensor or wiring needs replacement. Labor costs may also vary by location.

Can a bad oxygen sensor cause the P2237 code?

Yes, a faulty oxygen sensor is one of the most common causes of the P2237 code, as it can disrupt the current control circuit.

What tools are needed to repair the P2237 code?

Essential tools include an OBDII scanner, a digital multimeter, and basic automotive hand tools like wrenches and sockets.

Is a reflash or reprogramming of the ECM necessary for P2237?

In most cases, ECM reprogramming is not needed, but it may be required if the ECM itself is malfunctioning or if a software update is available to address the issue.