Volkswagen P1172: Throttle Actuation Potentiometer Sign.2 Signal Too Low

Is your scanner showing Volkswagen P1172?
No worries. We'll show you what it means and how to deal with it.

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Randy Worner

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Volkswagen P1172: Throttle Actuation Potentiometer Sign.2 Signal Too Low

OVERVIEW

Severity

High

DIY Difficulty Level

Intermediate

Repair Cost

$100-$1000

Can I Still Drive?

What Does The Volkswagen P1172 Code Mean?

Engine started, battery voltage must be at least 11.5v, all electrical components must be off, the ground between the engine and the chassis must be well connected, coolant temperature must be at least 80 degrees Celsius and the accelerator pedal must be properly adjusted. The ECM detected an incorrect singal from the throttle potentiometer.

Note: If the complete throttle valve control module is current-less (e. g. connector disconnected) the throttle valve moves into a particular, specified mechanical position, which signals an increased idle speed with an engine at operating temperature.

If only the Throttle Position (TP) actuator is current-less, the throttle valve also moves into the specified mechanical position (emergency running gap), however, since Closed Throttle Position (CTP) switch can still be recognized, an “almost normal idle RPM” is reached via the respective ignition angle retardation.

Note: Terminal assignment at throttle control module is different in vehicles with and without cruise control. Characteristic: Steering column switch with operating module for cruise control.