AutoCodes – Chevrolet – B3578 Chevrolet

B3578 Chevrolet Code - Output Air Temperature Sensor 6 Circuit

Quick Answer

Air temperature sensors allow the Heating, Ventilation, and Air Conditioning (HVAC) Control Module to monitor the temperature of the discharge air in the HVAC ducts. Common causes include Faulty Output Air Temperature Sensor 6, Output Air Temperature Sensor 6 harness is open or shorted, Output Air Temperature Sensor 6 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: B3578 Chevrolet indicates Output Air Temperature Sensor 6 Circuit.
Common causes: Common causes include Faulty Output Air Temperature Sensor 6, Output Air Temperature Sensor 6 harness is open or shorted, Output Air Temperature Sensor 6 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 2,591

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 09, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B3578 Chevrolet Description

Air temperature sensors allow the Heating, Ventilation, and Air Conditioning (HVAC) Control Module to monitor the temperature of the discharge air in the HVAC ducts. The module applies 5 volts to internal input resistors that are connected to the signal circuits of the air temperature sensors. The module provides ground to the air temperature sensors through the low reference circuit. The HVAC control module monitors the voltage drops across the air temperature sensors and uses the inputs for automatic control calculations. When the duct air temperatures are cold, the resistances of the sensors are high and the voltage signals are high. When the duct air temperatures are hot, the resistances of the sensors are low and the voltage signals are low. The HVAC control module converts the voltage values to count values where 1 volt is approximately equal to 51 counts.

OBDII Code B3578 Chevrolet - Output Air Temperature Sensor 6 Circuit - AutoCodes.com — B3578 Chevrolet Code - Output Air Temperature Sensor 6 Circuit

What does this mean?

What are the Possible Causes of the DTC B3578 Chevrolet?

Faulty Output Air Temperature Sensor 6
Output Air Temperature Sensor 6 harness is open or shorted
Output Air Temperature Sensor 6 circuit poor electrical connection
Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module

How to Fix the DTC B3578 Chevrolet?

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 does this mean?

Code Tech Notes

B3578 05: Output Air Temperature Sensor 6 Circuit Short to Battery or Open
B3578 02: Output Air Temperature Sensor 6 Circuit Short to Ground

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3578 Chevrolet 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 B3578 Chevrolet Code

1. What are the common symptoms of OBDII code B3578 in a Chevrolet related to the Output Air Temperature Sensor 6 Circuit?

- Common symptoms include issues with the vehicle's air conditioning system, such as fluctuating or inaccurate temperature readings.

2. What are the possible causes of OBDII code B3578 in a Chevrolet?

- The code B3578 can be triggered by a faulty output air temperature sensor, damaged wiring or connectors, or issues with the HVAC control module.

3. How can I diagnose the Output Air Temperature Sensor 6 Circuit issue in my Chevrolet?

- To diagnose the problem, you can use an OBDII scanner to retrieve the specific code, inspect the sensor and its wiring for any visible damage, and test the sensor's resistance.

4. Can a DIY enthusiast repair the Output Air Temperature Sensor 6 Circuit issue in a Chevrolet?

- Depending on your skill level, you may be able to replace the faulty sensor or repair damaged wiring yourself. However, it is recommended to consult a professional if you are unsure.

5. What are some tips for repairing OBDII code B3578 in a Chevrolet?

- Ensure that the sensor is properly connected and the wiring is in good condition. If replacing the sensor, use an OEM or high-quality replacement part to ensure proper functionality.

6. Will driving with OBDII code B3578 in a Chevrolet cause any further damage?

- While driving with this code may not immediately harm your vehicle, it can impact the performance of the air conditioning system and lead to discomfort for passengers.

7. How long does it typically take to repair OBDII code B3578 in a Chevrolet?

- The repair time can vary depending on the exact cause of the issue and your experience level. On average, it may take anywhere from 30 minutes to a few hours to diagnose and fix the problem.

8. Can resetting the OBDII system clear the B3578 code in a Chevrolet?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear. It's crucial to diagnose and fix the root cause.

9. Is it safe to continue driving my Chevrolet with the Output Air Temperature Sensor 6 Circuit issue?

- While it may be safe to drive with this issue in the short term, it is recommended to have the problem diagnosed and repaired to ensure proper functioning of the air conditioning system.

10. What is the cost of repairing OBDII code B3578 in a Chevrolet at a professional auto repair shop?

- The cost of repairing this code can vary based on the labor rates of the repair shop, the cost of parts, and the extent of the issue. It's advisable to get quotes from multiple shops for comparison.