AutoCodes – Chevrolet – B1527 Chevrolet

B1527 Chevrolet Code - Parasitic Load

Quick Answer

The components most likely to cause a parasitic draw on the battery of the vehicle are switches, relays, and control modules. Common causes include Faulty Battery, Low Battery Charge, Charging System. 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: B1527 Chevrolet indicates Parasitic Load.
Common causes: Common causes include Faulty Battery, Low Battery Charge, Charging System.
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 11,145

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 Apr 21, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1527 Chevrolet Description

The components most likely to cause a parasitic draw on the battery of the vehicle are switches, relays, and control modules. After the ignition is turned OFF the control modules will begin to go to sleep (shut OFF). All control modules do not go to sleep at the same time, some, like the Heating, Ventilation, and Air-Conditioning (HVAC) and body control modules, may take up to 30 min or longer after turning the ignition off before going to sleep. Others such as the ON Star and keyless entry control modules may periodically wake up then go back to sleep. These are all normal conditions. The Body Control Module (BCM) monitors the state of charge of the electrical system. If the BCM senses that the state of charge at ignition On is 30% lower than what it was when the engine was running.

OBDII Code B1527 Chevrolet - Parasitic Load - AutoCodes.com — B1527 Chevrolet Code - Parasitic Load

What does this mean?

What are the Possible Causes of the DTC B1527 Chevrolet?

Faulty Battery
Low Battery Charge
Charging System

How to Fix the DTC B1527 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1527 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.

Need more information about the B1527 Chevrolet code?

Need more information on how to fix the B1527 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1527 Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

B1527 2014 Chevrolet Silverado — Parasitic Load
B1527 2015 Chevrolet Silverado — Parasitic Load
B1527 2016 Chevrolet Silverado — Parasitic Load
B1527 2017 Chevrolet Silverado — Parasitic Load
B1527 2018 Chevrolet Silverado — Parasitic Load

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 B1527 Chevrolet Code

1. What does the OBDII code B1527 mean on a Chevrolet?

The B1527 code refers to a "Parasitic Load" issue, indicating excessive electrical draw on the vehicleâ€™s battery when the ignition is off.

2. What are the common symptoms of the B1527 code on a Chevrolet?

Symptoms may include a dead or weak battery, difficulty starting the vehicle, or intermittent electrical issues.

3. What causes the B1527 code to appear on a Chevrolet?

Common causes include a faulty module that doesnâ€™t shut down properly, aftermarket equipment drawing power, or a damaged electrical component causing a parasitic drain.

4. How is the B1527 code diagnosed on a Chevrolet?

Technicians will use a multimeter to measure current draw when the vehicle is off, inspect modules for proper shutdown, and check for aftermarket equipment causing excessive drain.

5. Can a weak battery trigger the B1527 code on a Chevrolet?

Yes, if the battery is weak or failing, it may contribute to parasitic load issues and trigger the B1527 code.

6. Can aftermarket accessories cause the B1527 code on a Chevrolet?

Yes, improperly installed or malfunctioning aftermarket accessories, such as alarms or stereos, can cause excessive parasitic drain.

7. How can you fix the B1527 code on a Chevrolet?

Repairs may involve replacing faulty electrical components, properly installing aftermarket accessories, or reprogramming control modules.

8. Is the B1527 code a serious issue for a Chevrolet?

Yes, if left unresolved, it can lead to repeated battery failures and potential long-term damage to the electrical system.

9. How much does it cost to fix the B1527 code on a Chevrolet?

Repair costs vary depending on the root cause but can range from $100 for minor fixes to $500 or more if module replacement is needed.

10. Can the B1527 code clear itself after repairs?

No, the code typically requires a scan tool to clear it after the underlying issue has been resolved.

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