Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI1998A4 AVANT QUATTRO, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - TESTS (2.8L)DIAGNOSTIC TESTSDTC P1559/17967 - IDLE SPEED CONTROL/THROTTLE POSITION ADAPTATION FAILURE
1998 Audi A4 Avant Quattro, Automatic
DTC P1559/17967 - Idle Speed Control/Throttle Position Adaptation Failure
1998 Audi A4 Avant Quattro, AutomaticSECTION DTC P1559/17967 - Idle Speed Control/Throttle Position Adaptation Failure
NOTE:
Adaptation was interrupted by application of throttle or by starting engine.
Perform Throttle Valve Control Module (TVCM) adaptation. VAG 1551 is necessary to perform TVCM adaptation. Follow test equipment manufacturer's instructions for VAG 1551 operation.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.