Audi P1559: Idle Speed Control Throttle Position Adaptation Malfunction

Is your scanner showing Audi P1559?
No worries. We'll show you what it means and how to deal with it.

Presented by
Randy Worner

Audi P1559: Idle Speed Control Throttle Position Adaptation Malfunction

OVERVIEW
Severity
:
High
DIY Difficulty Level
:
Advanced
Repair Cost
:
$400-$850
Can I Still Drive?
:
No

What Does The Audi P1559 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 and the throttle valve must not be damaged or dirty; and the ECM detected the signal from the Throttle Position Valve Module to the ECM detected was erratic, non existent or unreliable (too high or too low).

What Are The Potential Causes Of The Audi P1559 Code?

  • Throttle valve control module has failed
  • Throttle valve control module’s circuit has shorted or is open
  • The 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:

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 57.

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