Audi P1555: Charge Pressure Upper Limit Exceeded

Is your scanner showing Audi P1555?
No worries. We'll show you what it means and how to deal with it.

Presented by
Randy Worner

Audi P1555: Charge Pressure Upper Limit Exceeded

OVERVIEW
Severity
:
High
DIY Difficulty Level
:
Intermediate
Repair Cost
:
$200-$700
Can I Still Drive?
:
Yes

What Does The Audi P1555 Code Mean?

Engine started, battery voltage at least 11.5v, all electrical components off, ground connections between engine and chassis well connected, coolant temperature at least 80-degrees Celicius. The ECM detected deviation from the normal operating parameters of the charge pressure sensor.

What Are The Potential Causes Of The Audi P1555 Code?

  • Charge air system leaks
  • Recirculating valve for turbocharger is faulty
  • Turbocharging system is damaged
  • Vacuum diagramfor turbocharger needs adjusting
  • Wastegate bypass regulator valve is faulty
  • ECM has failed

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> Dorman 911-240 Turbocharger Diverter Valve
>>> Twippo 372Pcs Waterproof Wire Connectors Kit
>>> Audi Engine Control Module

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Reference Sources

Audi A4 Avant 95-01 Service Repair Manual, page 56.

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