AutoCodes – Cadillac – B3782 Cadillac

B3782 Cadillac Code - Air Flow Control 10 Feedback Circuit Malfunction

Quick Answer

The actuators operate using 5 circuits. Common causes include Faulty Auxiliary Mode Actuator, Auxiliary Mode Actuator harness is open or shorted, Auxiliary Mode Actuator 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: B3782 Cadillac indicates Air Flow Control 10 Feedback Circuit Malfunction.
Common causes: Common causes include Faulty Auxiliary Mode Actuator, Auxiliary Mode Actuator harness is open or shorted, Auxiliary Mode Actuator 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 3,465

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 Mar 15, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3782 Cadillac Description

The actuators operate using 5 circuits. A 5-volt reference, low reference, signal circuit and two bi-directional 0 or 12 volt control circuits. The Heating, Ventilation, and Air Conditioning (HVAC) Control Module supplies a low reference and 5-volt reference to the potentiometer. The HVAC control module monitors the voltage drop across the potentiometer on the door position signal circuit. As the actuator door changes position the door position signal circuit voltage also changes. The two bi-directional control circuits enable the actuator to operate. Both circuits are set to 0 volts when the HVAC control module detects, from the feedback potentiometer, that the actuator is in the desired position. In order to move the actuator, the HVAC control module switches the appropriate control circuit to 12 volts.

OBDII Code B3782 Cadillac - Air Flow Control 10 Feedback Circuit Malfunction - AutoCodes.com — B3782 Cadillac Code - Air Flow Control 10 Feedback Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC B3782 Cadillac?

Faulty Auxiliary Mode Actuator
Auxiliary Mode Actuator harness is open or shorted
Auxiliary Mode Actuator circuit poor electrical connection
Faulty Auxiliary Heating, Ventilation, and Air Conditioning (HVAC) Control Module

How to Fix the DTC B3782 Cadillac?

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 B3782 Cadillac 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 B3782 Cadillac Code

1. What are common symptoms of OBDII code B3782 in a Cadillac related to Air Flow Control 10 Feedback Circuit Malfunction?

- Common symptoms include poor engine performance, rough idling, stalling, and a decrease in fuel efficiency.

2. What are the possible causes of OBDII code B3782 in a Cadillac indicating Air Flow Control 10 Feedback Circuit Malfunction?

- Possible causes include a faulty air flow sensor, issues with the air flow control circuit, wiring problems, or a malfunctioning PCM.

3. How can I diagnose the OBDII code B3782 in a Cadillac related to Air Flow Control 10 Feedback Circuit Malfunction?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, checking the air flow sensor and related circuitry for faults, and conducting a visual inspection of the wiring.

4. Can a dirty air filter trigger OBDII code B3782 in a Cadillac for Air Flow Control 10 Feedback Circuit Malfunction?

- Yes, a dirty or clogged air filter can disrupt air flow readings and potentially contribute to triggering this code.

5. What are some repair tips for addressing OBDII code B3782 in a Cadillac concerning Air Flow Control 10 Feedback Circuit Malfunction?

- Repair tips may include cleaning or replacing the air filter, inspecting and repairing any damaged wiring, testing and potentially replacing the air flow sensor, and ensuring proper connections in the circuit.

6. Is it safe to continue driving a Cadillac with OBDII code B3782 indicating Air Flow Control 10 Feedback Circuit Malfunction?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage and potential safety hazards.

7. How much does it typically cost to repair OBDII code B3782 in a Cadillac related to Air Flow Control 10 Feedback Circuit Malfunction?

- The cost of repair can vary depending on the specific issue causing the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can I reset OBDII code B3782 in a Cadillac myself after making repairs for Air Flow Control 10 Feedback Circuit Malfunction?

- Yes, you can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to clear the error code.

9. Are there any recalls or technical service bulletins related to OBDII code B3782 in Cadillacs for Air Flow Control 10 Feedback Circuit Malfunction?

- It's recommended to check with the manufacturer or a dealership for any relevant recalls or technical service bulletins related to this specific OBDII code.

10. How can regular maintenance help prevent OBDII code B3782 in a Cadillac for Air Flow Control 10 Feedback Circuit Malfunction?

- Regular maintenance, such as replacing the air filter at recommended intervals and keeping the engine components clean, can help prevent issues that may trigger this code.