AutoCodes – Dodge – P0238 Dodge

P0238 Dodge Code - MAP Sensor Voltage Too High

Quick Answer

Manifold Air Pressure (MAP) sensor voltage is monitored when the engine speed is more than 416 RPM, but less than 3520 RPM and battery voltage is more than 10.4 volts. Common causes include Faulty Manifold Air Pressure (MAP) sensor, Manifold Air Pressure sensor harness is open or shorted, Manifold Air Pressure sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0238 Dodge indicates MAP Sensor Voltage Too High.
Common causes: Common causes include Faulty Manifold Air Pressure (MAP) sensor, Manifold Air Pressure sensor harness is open or shorted, Manifold Air Pressure sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,376

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 06, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0238 Dodge Description

Manifold Air Pressure (MAP) sensor voltage is monitored when the engine speed is more than 416 RPM, but less than 3520 RPM and battery voltage is more than 10.4 volts. The Diagnostic Trouble Code (DTC) may be stored if the Engine Control Module (ECM) senses the MAP sensor signal voltage is more than 4.88 volts at the start or with the engine running for 2 seconds.

OBDII Code P0238 Dodge - MAP Sensor Voltage Too High - AutoCodes.com — P0238 Dodge Code - MAP Sensor Voltage Too High

What does this mean?

What are the Possible Causes of the DTC P0238 Dodge?

Faulty Manifold Air Pressure (MAP) sensor
Manifold Air Pressure sensor harness is open or shorted
Manifold Air Pressure sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0238 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 P0238 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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Need more information on how to fix the P0238 Dodge 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 P0238 Dodge Code

What does the OBDII code P0238 mean for a Dodge vehicle?

P0238 indicates that the Engine Control Module (ECM) has detected a high voltage signal from the Manifold Absolute Pressure (MAP) sensor, which may affect engine performance.

What are common symptoms of the P0238 code?

Common symptoms include poor engine performance, reduced fuel economy, rough idle, and the check engine light being illuminated.

What could cause the P0238 code to trigger?

Causes may include a faulty MAP sensor, damaged wiring or connectors, a vacuum leak, or issues with the ECM.

Can I drive my Dodge with the P0238 code?

While it may be possible to drive the vehicle, it is not recommended as it can cause further engine performance issues and potential damage.

How can I diagnose the P0238 code?

Start by using an OBDII scanner to confirm the code, then visually inspect the MAP sensor and wiring for damage, check for vacuum leaks, and test the sensor's voltage output.

What repairs are commonly needed for the P0238 code?

Repairs may involve replacing the MAP sensor, repairing or replacing damaged wiring, fixing vacuum leaks, or reprogramming or replacing the ECM.

Is the P0238 code serious?

Yes, it can affect engine performance and fuel efficiency, so it should be addressed promptly to avoid further issues.

How can I prevent the P0238 code from occurring?

Regular maintenance, including checking and replacing worn sensors, ensuring proper vacuum system integrity, and addressing any electrical issues promptly can help prevent this code.

Will clearing the P0238 code fix the problem?

Clearing the code may temporarily turn off the check engine light, but the underlying issue needs to be resolved to prevent the code from reappearing.