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P1578 GMC Code - Brake Booster Vacuum Sensor Circuit Low Vacuum

- Code Popularity: 4,106 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P1578 GMC?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Brake Booster Vacuum (BBV) sensor
  • Brake Booster Vacuum (BBV) sensor harness is open or shorted
  • Brake Booster Vacuum (BBV) sensor circuit poor electrical connection
⚠ Does your GMC have Safety Recalls? → Check here

How to Fix the DTC P1578 GMC?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1578 GMC code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code P1578 GMC Description

During engine speed at 500 rpm or more for 20 seconds, brakes not applied, BARO input at 72 kPa or more, MAP input at 60 kPa or less, the Powertrain Control Module (PCM) detects the Brake Booster Vacuum (BBV) input of 5 kPa or less for 16 seconds.

OBDII Code P1578 GMC - Brake Booster Vacuum Sensor Circuit Low Vacuum - AutoCodes.com
P1578 GMC Code - Brake Booster Vacuum Sensor Circuit Low Vacuum

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Code P1578 GMC comments

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