AutoCodes – Dodge – B1820 Dodge

B1820 Dodge Code - Hood Ajar Input Circuit High

Quick Answer

The Totally Integrated Power Module (TIPM) monitors the Hood Ajar Switch Sense Circuit. Common causes include Faulty Hood Ajar Switch Sense, Hood Ajar Switch Sense harness is open or shorted, Hood Ajar Switch Sense 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: B1820 Dodge indicates Hood Ajar Input Circuit High.
Common causes: Common causes include Faulty Hood Ajar Switch Sense, Hood Ajar Switch Sense harness is open or shorted, Hood Ajar Switch Sense 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 7,320

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 Jul 08, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1820 Dodge Description

The Totally Integrated Power Module (TIPM) monitors the Hood Ajar Switch Sense Circuit. When the Totally Integrated Power Module senses 12 volts on the Hood Ajar Switch Sense circuit for over 10 seconds, this Diagnostic Trouble Code (DTC) will set.

OBDII Code B1820 Dodge - Hood Ajar Input Circuit High - AutoCodes.com — B1820 Dodge Code - Hood Ajar Input Circuit High

What does this mean?

What are the Possible Causes of the DTC B1820 Dodge?

Faulty Hood Ajar Switch Sense
Hood Ajar Switch Sense harness is open or shorted
Hood Ajar Switch Sense circuit poor electrical connection
Faulty Totally Integrated Power Module (TIPM)

How to Fix the DTC B1820 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 B1820 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 Help with the Code?

Get the B1820 Dodge code diagnosed by a professional: Find a repair shop in your area

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 B1820 Dodge Code

1. What are the common symptoms of OBDII code B1820 Dodge (Hood Ajar Input Circuit High)?

- Common symptoms include the hood warning light staying illuminated, the hood not securely latching, and potential issues with the vehicle's alarm system.

2. What are the possible causes of OBDII code B1820 Dodge (Hood Ajar Input Circuit High)?

- The code may be triggered by a faulty hood ajar sensor, damaged wiring or connectors in the hood ajar circuit, or a misaligned hood latch.

3. How can I diagnose the issue related to OBDII code B1820 Dodge (Hood Ajar Input Circuit High)?

- You can start by visually inspecting the hood latch mechanism and wiring for any visible damage. Using a multimeter to test the circuit continuity can help identify the faulty component.

4. Can I drive my vehicle with OBDII code B1820 Dodge (Hood Ajar Input Circuit High) without causing further damage?

- It is generally safe to drive the vehicle with this code, but you may experience inconvenience due to the constant hood warning light and potential issues with the alarm system.

5. What is the recommended repair for OBDII code B1820 Dodge (Hood Ajar Input Circuit High)?

- The repair typically involves replacing the faulty hood ajar sensor, repairing any damaged wiring or connectors, and ensuring the hood latch is properly aligned and functioning.

6. Are there any DIY tips for fixing OBDII code B1820 Dodge (Hood Ajar Input Circuit High)?

- DIY enthusiasts with automotive repair experience can attempt to inspect and replace the hood ajar sensor or repair damaged wiring. However, it is recommended to consult a professional for accurate diagnosis and repair.

7. Will resetting the OBDII code B1820 Dodge (Hood Ajar Input Circuit High) resolve the issue?

- Resetting the code may temporarily turn off the warning light, but it will not fix the underlying problem. It is important to diagnose and address the root cause of the code to prevent it from recurring.

8. Can extreme weather conditions affect the triggering of OBDII code B1820 Dodge (Hood Ajar Input Circuit High)?

- Yes, extreme temperatures or environmental conditions can sometimes impact the functioning of the hood ajar sensor or wiring, leading to the triggering of the code.

9. How long does it typically take to repair OBDII code B1820 Dodge (Hood Ajar Input Circuit High)?

- The repair time can vary depending on the extent of the issue and the availability of replacement parts. In general, a professional repair may take a few hours to complete.

10. Is OBDII code B1820 Dodge (Hood Ajar Input Circuit High) a common issue in Dodge vehicles?

- While not extremely common, issues related to the hood ajar sensor and circuit can occur in Dodge vehicles, particularly in older models or those exposed to harsh driving conditions.