AutoCodesDodge – P2238 Dodge

P2238 Dodge Code - O2 Sensor Positive Current Control Circuit Low 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
P2238 Dodge indicates O2 Sensor Positive Current Control Circuit Low 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 3,908
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P2238 Dodge 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 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 P2238 Dodge - O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1 - AutoCodes.com
P2238 Dodge Code - O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1

What are the Possible Causes of the DTC P2238 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 P2238 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 P2238 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 P2238 Dodge Code

What does the OBDII code P2238 mean for a Dodge vehicle?

P2238 refers to an issue with the O2 sensor positive current control circuit for Bank 1 Sensor 1, indicating that the circuit is reading a low voltage.

What are the common symptoms of code P2238 in a Dodge vehicle?

Symptoms include poor engine performance, reduced fuel efficiency, rough idling, and the illumination of the check engine light.

What causes the P2238 code to appear in a Dodge vehicle?

Common causes include a faulty oxygen sensor, damaged wiring or connectors, issues with the PCM, or excessive exhaust contamination.

Can a faulty oxygen sensor cause the P2238 code on a Dodge?

Yes, a malfunctioning Bank 1 Sensor 1 oxygen sensor is one of the most common causes of this code.

Is it safe to drive with the P2238 code on a Dodge vehicle?

Driving with this code can lead to poor fuel economy and potential engine damage; it’s recommended to address the issue promptly.

How can I diagnose the P2238 code on a Dodge vehicle?

Start by inspecting the oxygen sensor and its wiring for damage, followed by testing the sensor’s functionality and checking for PCM-related issues.

How do you repair the P2238 code on a Dodge vehicle?

Repairs may include replacing the oxygen sensor, fixing damaged wiring, cleaning exhaust components, or reprogramming the PCM if necessary.

Does the P2238 code on a Dodge vehicle affect emissions?

Yes, a malfunctioning oxygen sensor can lead to incorrect air-fuel mixture ratios, increasing emissions.

What tools are needed to fix the P2238 code on a Dodge vehicle?

You may need an OBDII scanner, multimeter, wire repair tools, and basic automotive hand tools to diagnose and repair this code.

Can an exhaust leak cause the P2238 code on a Dodge vehicle?

Yes, an exhaust leak near Bank 1 Sensor 1 can disrupt accurate readings and contribute to the P2238 code.

Discuss the causes and fixes for P2238 Dodge OBDII Code

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