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 DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 8 (ENGINE CONTROLS - TESTS W/CODES - TESTS)DIAGNOSTIC TESTSDTC P1611/18019 - MALFUNCTION INDICATOR LIGHT (MIL) CALL-UP/TRANSMISSION CONTROL MODULE (TCM) SHORT TO GROUND
1998 Audi A4 Avant Quattro, Automatic
DTC P1611/18019 - Malfunction Indicator Light (Mil) Call-Up/Transmission Control Module (TCM) Short To Ground
1998 Audi A4 Avant Quattro, AutomaticSECTION DTC P1611/18019 - Malfunction Indicator Light (Mil) Call-Up/Transmission Control Module (TCM) Short To Ground
WARNING: This page is about a different car, the 1998 Audi Cabriolet. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
This DTC can only occur if vehicle is equipped with an automatic transmission. If malfunctions are recognized that are related to exhaust system, the automatic transmission switches on MIL.
- Using DVOM, check MIL circuit between PCM and TCM for a short circuit. Repair circuit as necessary. If circuit is okay, go to next step. If circuit was repaired, erase DTC memory and test drive vehicle. See CLEARING CODES and TEST DRIVE in TESTS W/CODES - INTRODUCTION article.
- Replace faulty TCM. Erase DTC memory and test drive vehicle. See CLEARING CODES and TEST DRIVE in TESTS W/CODES - INTRODUCTION article. If DTC sets again, go to next step.
- Replace faulty PCM. Code new PCM and test drive vehicle. See PCM CODING and TEST DRIVE in TESTS W/CODES - INTRODUCTION article.
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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.