Will not stay running after changing brake booster pressure sensor

DLEECE26

MEMBER
2018 CHEVROLET EQUINOX
76,000 MILES

The other day the brakes got hard and the check engine light came on. I stopped at Advance and had the code checked and it said it was the brake booster vacuum pressure sensor. Well, before I could get the part and replace it the car got to where it would start and it shuts right back off. I have just replaced the sensor like it said and now it still starts and shuts off. So what could my problem be now?

1 Reply

ASEMASTER6371

MECHANIC
52,797 POSTS

Good morning,

The sensor will not cause this at all. All the sensor does is send a signal to the ECM for vacuum. The sensor did its job.

Can you hear any hissing around the brake pedal or outside at the booster? It sounds like the booster is the issue and that will cause the engine to stall as well.

I attached the procedure below for you for the repair.

Roy

Removal Procedure
Brake Pedal Position Sensor (1) � Remove � Brake Pedal Position Sensor Replacement
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Power Brake Booster Vacuum Sensor Electrical Connector (1) � Disconnect
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Power Brake Booster Vacuum Sensor (1) � Remove
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Brake Master Cylinder (1) � Remove � Brake Master Cylinder Replacement
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Electronic Brake Control Module with Brake Pressure Modulator Valve (1) � Remove � Electronic Brake Control Module with Brake Pressure Modulator Valve Replacement
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Range Selector Actuator(2) � Remove � Range Selector Actuator Replacement
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Power Brake Booster Bolt (1) � Loosen [2x]
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Note: Some components not shown for graphic clarity.
Brake Pedal (1) � Disconnect
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With the aid of an assistant, hold the power brake booster away from the dash panel and pull the brake pedal rearward to disconnect the brake pedal retainer from the power brake booster pushrod.
Brake Pedal Retainer (1) � Remove and DISCARD
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Power Brake Booster (1) � Remove
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Power Brake Booster Seal (1) � Remove
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Power Brake Booster Seal � Inspect for damage

Images (Click to make bigger)