B374A:05 GMC Code - Air Flow Control Position Feedback Circuit Short To Battery Or Open
Quick Answer
The B374A:05 diagnostic trouble code (DTC) for GMC vehicles indicates an issue with the air flow control position feedback circuit, specifically a short to battery or an open circuit. Common causes include Faulty air flow control position sensor: The sensor that detects the position of the air flow control valve may be malfunctioning, causing incorrect feedback to the ECM, Wiring issues: Damaged or corroded wiring in the air flow control position feedback circuit can lead to shorts or open circuits, disrupting communication, Poor electrical connections: Loose or poor electrical connections between components in the circuit can also trigger this code. 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
- B374A:05 GMC indicates Air Flow Control Position Feedback Circuit Short To Battery Or Open.
- Common causes
- Common causes include Faulty air flow control position sensor: The sensor that detects the position of the air flow control valve may be malfunctioning, causing incorrect feedback to the ECM, Wiring issues: Damaged or corroded wiring in the air flow control position feedback circuit can lead to shorts or open circuits, disrupting communication, Poor electrical connections: Loose or poor electrical connections between components in the circuit can also trigger this code.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code B374A:05 GMC Description
The B374A:05 diagnostic trouble code (DTC) for GMC vehicles indicates an issue with the air flow control position feedback circuit, specifically a short to battery or an open circuit. This code is typically associated with problems in the vehicle's electronic control system that manages the air flow within the engine. The air flow control position feedback circuit is responsible for providing feedback on the position of the air flow control valve to the engine control module (ECM). This information is crucial for the ECM to adjust the air flow and fuel mixture to ensure optimal engine performance.
Common Causes of B374A:05 GMC
- Faulty air flow control position sensor: The sensor that detects the position of the air flow control valve may be malfunctioning, causing incorrect feedback to the ECM.
- Wiring issues: Damaged or corroded wiring in the air flow control position feedback circuit can lead to shorts or open circuits, disrupting communication.
- Poor electrical connections: Loose or poor electrical connections between components in the circuit can also trigger this code.
- ECM malfunction: A malfunctioning ECM may not be able to properly interpret the feedback from the air flow control position sensor, leading to the code.
- Environmental factors: Exposure to extreme temperatures, moisture, or other environmental factors can also contribute to the development of this issue.
Symptoms of B374A:05 GMC
- Rough idling: The vehicle may experience irregular idling or fluctuations in engine speed.
- Stalling: The engine may stall unexpectedly, especially when coming to a stop or during low-speed driving.
- Hesitation during acceleration: The vehicle may hesitate or struggle to accelerate smoothly.
- Decreased power output: The vehicle may feel sluggish or have reduced power output.
- Check engine light: The check engine light may illuminate on the dashboard to indicate a problem with the air flow control position feedback circuit.
How to Fix B374A:05 GMC
- Diagnostic scan: Begin by using a diagnostic scan tool to retrieve the specific DTC and identify the exact cause of the issue.
- Inspect wiring and connections: Check the wiring harness and connectors in the air flow control position feedback circuit for any damage, corrosion, or loose connections.
- Test air flow control position sensor: Test the air flow control position sensor for proper operation and replace if necessary.
- Repair or replace damaged components: Repair any damaged wiring or replace faulty components in the circuit as needed.
- Clear DTC and test drive: Clear the DTC with the diagnostic scan tool and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix B374A:05 GMC
The cost of repairing a B374A:05 DTC for GMC vehicles can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. On average, the repair cost for this issue may range from $200 to $500, including parts and labor. Keep in mind that diagnosis time and labor rates can fluctuate based on location, vehicle make and model, and the complexity of the repair. It's recommended to consult with a professional mechanic or auto repair shop for a more accurate cost estimate.
Need more information about the B374A:05 GMC code?
Need more information on how to fix the B374A:05 GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B374A:05 GMC code diagnosed by a professional: Find a repair shop in your area
Information for Specific GMC Models
- B374A 2014 GMC Sierra — Air Flow Control Position Feedback Circuit
- B374A 2015 GMC Sierra — Air Flow Control Position Feedback Circuit
- B374A 2016 GMC Sierra — Air Flow Control Position Feedback Circuit
- B374A 2017 GMC Sierra — Air Flow Control Position Feedback Circuit
- B374A 2018 GMC Sierra — Air Flow Control Position Feedback Circuit
Frequently Asked Questions about B374A:05 GMC Code
1. What does the OBDII code B374A:05 mean on a GMC vehicle?
The code B374A:05 indicates an issue with the Air Flow Control Position Feedback Circuit, specifically a short to battery or an open circuit.
2. What are common symptoms of the B374A:05 code in GMC vehicles?
Symptoms may include poor HVAC airflow control, inability to adjust air direction, or the HVAC system being stuck in one mode.
3. What causes the B374A:05 code to trigger?
Common causes include a damaged wiring harness, a faulty air flow control actuator, a shorted or open circuit in the feedback wiring, or a malfunctioning HVAC control module.
4. Can I drive my GMC with the B374A:05 code?
Yes, but you may experience discomfort due to limited HVAC functionality. The code doesn’t typically affect drivability but should be addressed to restore proper air control.
5. How can I diagnose the B374A:05 code?
Diagnosis involves inspecting the wiring and connectors for damage, testing the air flow control actuator for proper operation, and checking for voltage and continuity in the feedback circuit.
6. How do I fix the B374A:05 code on a GMC?
Repairs may include replacing a damaged air flow control actuator, repairing or replacing faulty wiring or connectors, or reprogramming or replacing the HVAC control module.
7. How much does it cost to repair the B374A:05 code?
Costs vary depending on the repair. Replacing an actuator typically costs $150-$300, while wiring repairs may cost $50-$200, plus labor.
8. Can a blown fuse cause the B374A:05 code?
While a blown fuse is less common for this specific code, it’s still worth checking the HVAC-related fuses as part of your diagnostic process.
9. Will resetting the code fix the B374A:05 issue?
Resetting the code may clear it temporarily, but the underlying issue must be repaired to prevent the code from returning.
10. Is the B374A:05 code related to other HVAC problems?
Yes, this code can be associated with issues like improper air temperature control or other actuator-related malfunctions in the HVAC system.
Discuss the causes and fixes for B374A:05 GMC OBDII Code
Code B374A:05 GMC comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.