P0556 Code - Brake Booster Pressure Sensor Circuit Range/Performance

What Does P0556 Mean?

The poor running symptoms are consistent with a MAP sensor malfunction. In addition, in some cases, a bad MAP sensor will not throw a code. Again, the ELD code likely represents a separate wiring issue. When you see P0556 engine fault code on your engine code reader this description will help you.

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What are the common causes of P0556 ?

• Faulty Brake Booster Pressure Sensor
• Brake Booster Pressure Sensor harness is open or shorted
• Brake Booster Pressure Sensor circuit poor electrical connection

How do you troubleshoot P0556 ?

Common steps mechanics take to repair the problems associated with the P0556 code are:

• Repair or replace any shorted, disconnected, damaged or corroded connectors, wires or other electrical components
• Repair or replace the power steering pump, fluid connection, lines and fluid level
• Repair or replace a faulty sensor

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