Engine-Codes - Generic - B1271

B1271 - Theft Protection Active

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

B1271 Possible Causes

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

How is the B1271 code repair?

Start by checking 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.

What is the cost to diagnose the B1271 code

Labor: 1.0

The cost to diagnose the B1271 code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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Possible Symptoms

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

B1271 Meaning

When the Control Module is initially installed in the vehicle, the Control Module receives Vehicle Identification Number (VIN) information via serial data. The Control Module stores a portion of the VIN and compares this sequence to the VIN information received each time the Control Module powers on. The VIN in the Control Module is a single one-time learn.
The Control Module theft deterrent system is intended to disable or limit Control Module functionality if incorrect vehicle information is received by the Control Module. The Control Module disables functionality if the VIN information received by the Control Module does not match the VIN information that has been learned by the Control Module. This DTC is generated by the module when the Theft Protection is activated.

More Information

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