AutoCodes – RAM – B2112 RAM

B2112 RAM Code - 5 Volt Supply Circuit Low

Quick Answer

The Front Control Module monitors the A/C Pressure Transducer 5-Volt Supply Circuit. Common causes include Faulty A/C Pressure Transducer, A/C Pressure Transducer harness is open or shorted, A/C Pressure Transducer 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: B2112 RAM indicates 5 Volt Supply Circuit Low.
Common causes: Common causes include Faulty A/C Pressure Transducer, A/C Pressure Transducer harness is open or shorted, A/C Pressure Transducer 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 1,147

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 Sep 17, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2112 RAM Description

The Front Control Module monitors the A/C Pressure Transducer 5-Volt Supply Circuit. The Front Control Module sets the OBDII code when it detects the 5 volt supply circuit voltage below 4 volts.

OBDII Code B2112 RAM - 5 Volt Supply Circuit Low - AutoCodes.com — B2112 RAM Code - 5 Volt Supply Circuit Low

What does this mean?

What are the Possible Causes of the DTC B2112 RAM?

Faulty A/C Pressure Transducer
A/C Pressure Transducer harness is open or shorted
A/C Pressure Transducer circuit poor electrical connection
Faulty Front Control Module (FCM)

How to Fix the DTC B2112 RAM?

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 B2112 RAM 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.

Need more information about the B2112 RAM code?

Need more information on how to fix the B2112 RAM code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2112 RAM 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 B2112 RAM Code

1. What are the common symptoms of OBDII code B2112 RAM - 5 Volt Supply Circuit Low?

The common symptoms include issues with the vehicle's starting, rough idling, poor fuel efficiency, and possible stalling.

2. What causes the OBDII code B2112 RAM - 5 Volt Supply Circuit Low?

The code is usually triggered by a fault in the 5-volt supply circuit, which can be caused by a short circuit, damaged wiring, or a malfunctioning sensor.

3. How can I diagnose the 5 Volt Supply Circuit Low issue?

To diagnose this problem, you can use a multimeter to check the voltage output of the affected sensor or circuit, inspect the wiring for any visible damage, and perform a thorough visual inspection of the components involved.

4. Can a faulty sensor trigger the B2112 code?

Yes, a faulty sensor connected to the 5-volt supply circuit, such as a throttle position sensor or manifold absolute pressure sensor, can trigger the B2112 RAM code.

5. What are the repair options for fixing the 5 Volt Supply Circuit Low issue?

Repair options include repairing or replacing damaged wiring, fixing any short circuits, replacing a faulty sensor, or addressing any underlying issues that may be causing the low voltage supply.

6. Is it safe to continue driving with the B2112 RAM code active?

It is not recommended to drive with the B2112 RAM code active, as it can lead to poor vehicle performance, potential stalling, and further damage to the vehicle's components.

7. Can a DIY enthusiast fix the B2112 RAM code issue?

Depending on your skill level and access to tools, you may be able to address the issue yourself by following detailed repair guides or seeking help from automotive forums.

8. How much does it typically cost to repair the 5 Volt Supply Circuit Low problem?

The cost of repair can vary depending on the extent of the issue, the specific component that needs replacing, and whether you choose to do the repair yourself or take your vehicle to a professional mechanic.

9. Will resetting the OBDII code make the issue go away permanently?

Resetting the code may temporarily clear the warning light, but if the underlying issue causing the B2112 RAM code is not addressed, it is likely to reoccur. It is important to diagnose and fix the root cause of the problem.

10. How long does it take to repair the B2112 RAM - 5 Volt Supply Circuit Low issue?

The repair time can vary depending on the complexity of the problem, the availability of parts, and whether you are doing the repair yourself or taking your vehicle to a mechanic. It could take anywhere from a few hours to a full day to complete the repair.