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 MANUALSAUDI1996A4 BASE, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - TESTS W/CODES - 2.8LCIRCUIT TESTSDTC P0605/16989 - PCM ROM ERROR
1996 Audi A4 Base, Standard
DTC P0605/16989 - Pcm ROM Error
1996 Audi A4 Base, StandardSECTION DTC P0605/16989 - Pcm ROM Error
NOTE:
DTC is set in ROM/RAM or EEPROM when PCM recognizes internal failures.
Replace faulty PCM. Code new PCM and test drive vehicle. See PCM CODING and TEST DRIVE in this article. Recheck DTC memory and verify DTC does not set again. If DTC sets again, perform testing procedure again.
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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.