AutoCodes - OBDII Code List - B1009 BUICK

B1009 BUICK - EEPROM Cchecksum Error

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3    What is this?
Table of contents

B1009 BUICK Possible Causes

  • Faulty Control Module
  • Control Module harness is open or shorted
  • Control Module circuit poor electrical connection

How do I fix code B1009 BUICK?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
How much do you know about cars?

Take the AutoCodes.com automotive tests and turbo-charge your car repair knowledge

Play Now

Cost of diagnosing the B1009 BUICK code

Labor: 1.0

The cost of diagnosing the B1009 BUICK code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B1009 BUICK Description

EEPROM checksum error detection is internal. No external circuits are involved. For DTC to set, the microprocessor must run the program to detect a checksum error after each power up. The only requirements are voltage and ground. The program runs even if the voltage is out of operating range.
Microprocessor retains an inverse copy of digital value stored in certain blocks of memory in EEPROM. The microprocessor then reads information from those blocks and adds stored inverse value to current value. If they do not equal 0, the microprocessor sets DTC B1009.
When DTC is set, microprocessor reverts to base operation values programmed for those blocks of data that have failed checksum test. Blocks of data that have not failed the checksum test are not affected. DTC clears when microprocessor runs a successful checksum test of EEPROM.
OBDII Code B1009 Buick - EEPROM Cchecksum Error - AutoCodes.com

More Information

Need more information on how to fix the B1009 BUICK code?
Get Access to Factory Service Manuals

Need more help?

Get the B1009 Buick code diagnosed by a professional: Find a repair shop in your area

Comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the B1009 Buick code? Have you replaced any parts?
Any information is appreciated. Thanks
Top ⇧