AutoCodes – Chrysler – B1820 Chrysler

B1820 Chrysler 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 Chrysler 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 4,614

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

What does this mean?

What are the Possible Causes of the DTC B1820 Chrysler?

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 Chrysler?

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 Chrysler 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?

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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 B1820 Chrysler Code

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

- Common symptoms include the hood warning light staying illuminated, false hood open alerts, and intermittent issues with the hood latch.

2. What are the possible causes of OBDII code B1820 Chrysler?

- The code B1820 can be triggered by a faulty hood ajar switch, damaged wiring in the hood ajar circuit, or a malfunctioning body control module.

3. How serious is OBDII code B1820 Chrysler?

- While this code is not typically a safety concern, it can be annoying to deal with false hood open warnings and may affect the proper functioning of related systems.

4. How can I diagnose OBDII code B1820 Chrysler?

- Diagnosis involves using a scan tool to read the code, checking the hood ajar switch, inspecting the wiring for damage, and testing the body control module.

5. Can I drive my vehicle with OBDII code B1820 Chrysler?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to prevent any inconvenience or potential problems.

6. How can I repair OBDII code B1820 Chrysler?

- Repair options include replacing the hood ajar switch, repairing damaged wiring, or reprogramming the body control module if necessary.

7. Can I reset OBDII code B1820 Chrysler without fixing the underlying issue?

- Resetting the code without addressing the root cause will only temporarily clear the warning light, as the issue will likely trigger the code again.

8. Are there any DIY tips for fixing OBDII code B1820 Chrysler?

- DIY tips may include checking and cleaning the hood ajar switch contacts, inspecting the wiring for visible damage, and ensuring proper connections.

9. How much does it cost to repair OBDII code B1820 Chrysler at a mechanic?

- Repair costs can vary depending on the specific cause of the code, but expect to pay for diagnosis time, parts, and labor, which may range from $100 to $300 or more.

10. Can moisture or dirt cause OBDII code B1820 Chrysler to trigger?

- Yes, moisture or dirt buildup around the hood ajar switch or wiring can lead to a poor connection and trigger the B1820 code. Regular cleaning and maintenance can help prevent this issue.