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Engine-Codes - Generic - B1204

B1204 - Diagnosis Sensor Unit

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

B1204 Possible Causes

  • Faulty Diagnosis Sensor Unit
  • Diagnosis Sensor Unit harness is open or shorted
  • Diagnosis Sensor Unit circuit poor electrical connection

How is the B1204 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 B1204 code

Labor: 1.0

The cost to diagnose the B1204 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.

Possible Symptoms

  • Air Bag Warning Light ON

B1204 Meaning

The Air Bag Diagnosis Sensor Unit detects the whole SRS electrical system and displays the malfunction either by illuminating or blinking the air bag warning lamp in the combination meter. The Air Bag Diagnosis Sensor Unit detects a shock that exceeds specified level and watches such systems as the driver and passenger air bag, side air bag, curtain air bag, pre-tensioner seat belts and Occupant Classification System (OCS) operate properly.
The Air Bag Diagnosis Sensor Unit contains the ā€œGā€ sensors for both frontal and side collisions and spare battery function in case of main battery damaged in a collision.

More Information

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Information for specific makes

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