AutoCodes – Dodge – P0381 Dodge

P0381 Dodge Code - Glow Plug/Heater Indicator Circuit Malfunction

Quick Answer

The glow plug system is used to assist in providing the heat required to begin combustion during cold engine temperatures. Common causes include Faulty Glow Plug, Glow Plug harness is open or shorted, Glow Plug 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: P0381 Dodge indicates Glow Plug/Heater Indicator Circuit Malfunction.
Common causes: Common causes include Faulty Glow Plug, Glow Plug harness is open or shorted, Glow Plug 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 5,520

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 16, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0381 Dodge Description

The glow plug system is used to assist in providing the heat required to begin combustion during cold engine temperatures. The glow plugs are heated before and during cranking, as well as initial engine operation. The Engine Control Module (ECM) controls the glow plug ON times by monitoring coolant temperature and glow plug voltage. The California Glow Plug system has eight individual glow plug supply circuits between the controller and the glow plugs. If the feedback voltage from the controller to the ECM is not within range, DTC P0380 will set.

OBDII Code P0381 Dodge - Glow Plug/Heater Indicator Circuit Malfunction - AutoCodes.com — P0381 Dodge Code - Glow Plug/Heater Indicator Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P0381 Dodge?

Faulty Glow Plug
Glow Plug harness is open or shorted
Glow Plug circuit poor electrical connection

How to Fix the DTC P0381 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 P0381 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 P0381 Dodge Code

1. What is OBDII code P0381 in a Dodge vehicle?

OBDII code P0381 indicates a Glow Plug/Heater Indicator Circuit Malfunction in a Dodge vehicle.

2. What are the common symptoms of OBDII code P0381 in a Dodge?

Common symptoms of P0381 in a Dodge may include hard starting, misfires, rough idling, and the glow plug indicator not illuminating properly.

3. What are the possible causes of OBDII code P0381 in a Dodge?

The possible causes of P0381 in a Dodge include a faulty glow plug, defective glow plug relay, wiring issues in the glow plug circuit, or a malfunctioning PCM (Powertrain Control Module).

4. How can I diagnose the OBDII code P0381 in my Dodge?

Diagnosing P0381 involves checking the glow plugs for proper operation, inspecting the glow plug relay, testing the wiring for continuity and shorts, and scanning the PCM for any related fault codes.

5. Can I still drive my Dodge with OBDII code P0381?

While it may be possible to drive your Dodge with code P0381, it is not recommended as it can lead to starting issues and potential engine damage. It is best to address the issue promptly.

6. How can I repair OBDII code P0381 in my Dodge?

Repairing P0381 may involve replacing faulty glow plugs, repairing or replacing the glow plug relay, fixing any wiring issues, or reprogramming the PCM if necessary.

7. Are there any tips to prevent OBDII code P0381 in my Dodge?

To prevent code P0381, it's recommended to follow the manufacturer's recommended maintenance schedule, use high-quality glow plugs, and address any starting or idling issues promptly.

8. Is OBDII code P0381 a serious problem in a Dodge vehicle?

OBDII code P0381 should be addressed promptly as it can lead to starting difficulties and potential engine damage if left unresolved. Ignoring the issue can result in more costly repairs.

9. Can a DIY enthusiast repair OBDII code P0381 in a Dodge at home?

Depending on your technical skills and access to tools, DIY enthusiasts may be able to address code P0381 by following repair guides or consulting service manuals. However, complex issues may require professional assistance.

10. How much does it typically cost to repair OBDII code P0381 in a Dodge?

The cost of repairing P0381 in a Dodge can vary depending on the root cause of the issue, the parts needed, and labor costs. It is recommended to obtain quotes from reputable mechanics or service centers for an accurate estimate.