Audi A4 Starting Failure Points to Ignition Circuit

Had a similar starting issue with my 2014 Audi A6 last month. The symptoms pointed to a power supply problem affecting the ignition switch system. After thorough testing, it turned out the wiring harness connecting to the ignition module had deteriorated connection points. The main issue was that the relay switch controlling the ignition circuit had damaged pins, causing intermittent power loss. When testing voltage drops seemed normal at first, but the real problem became apparent when checking continuity through the entire ignition circuit. This was actually a serious electrical issue that could have led to complete system failure. The repair required replacing the main wiring harness section and installing a new relay switch assembly. The deteriorated connections were causing the computer to throw those error codes because of inconsistent power delivery to the ignition components. Worth checking the wiring connections near your ignition switch first, look for any signs of wear or loose fitting. Your A4 shares similar ignition system architecture with the A6, so these components are likely in comparable locations. When the car wont start, often its these hidden electrical connection issues rather than the more obvious mechanical problems.

Had a similar starting issue with my 2014 Audi A6 last month. The symptoms pointed to a power supply problem affecting the ignition switch system. After thorough testing, it turned out the wiring harness connecting to the ignition module had deteriorated connection points. The main issue was that the relay switch controlling the ignition circuit had damaged pins, causing intermittent power loss. When testing voltage drops seemed normal at first, but the real problem became apparent when checking continuity through the entire ignition circuit. This was actually a serious electrical issue that could have led to complete system failure. The repair required replacing the main wiring harness section and installing a new relay switch assembly. The deteriorated connections were causing the computer to throw those error codes because of inconsistent power delivery to the ignition components. Worth checking the wiring connections near your ignition switch first, look for any signs of wear or loose fitting. Your A4 shares similar ignition system architecture with the A6, so these components are likely in comparable locations. When the car wont start, often its these hidden electrical connection issues rather than the more obvious mechanical problems.

Thanks for sharing your A6 experience. Facing something nearly identical with my A4 now, car wont start and getting those same error codes. After reading about your wiring harness issues, I checked mine and noticed some corroded battery terminals too. Going to have the whole ignition circuit and starter solenoid inspected just to be thorough. Wondering how much the repair ended up costing you? Also, have you had any other electrical gremlins pop up since getting it fixed?

Thanks for sharing your A6 experience. Facing something nearly identical with my A4 now, car wont start and getting those same error codes. After reading about your wiring harness issues, I checked mine and noticed some corroded battery terminals too. Going to have the whole ignition circuit and starter solenoid inspected just to be thorough. Wondering how much the repair ended up costing you? Also, have you had any other electrical gremlins pop up since getting it fixed?

Thanks for asking about the repair costs. After having the mechanic look at it, they found and fixed the Terminal 15 ignition positive interruption issue. The total bill came to 95 Euro for repairing the cable and plug connections that were causing the problems. The main concern was a faulty connection in the power supply system, but once they traced the circuit break and replaced the damaged components, everything started working perfectly. The fuse box connections were also cleaned and secured as a preventive measure. Since getting it fixed three months ago, the ignition switch has been working flawlessly, no more starting issues or error codes. The battery terminals are maintaining solid contact, and the electrical system is running smoothly. If you spot similar symptoms, having a professional check the entire ignition circuit is definitely worth the investment to prevent bigger problems down the road.

Thanks for asking about the repair costs. After having the mechanic look at it, they found and fixed the Terminal 15 ignition positive interruption issue. The total bill came to 95 Euro for repairing the cable and plug connections that were causing the problems. The main concern was a faulty connection in the power supply system, but once they traced the circuit break and replaced the damaged components, everything started working perfectly. The fuse box connections were also cleaned and secured as a preventive measure. Since getting it fixed three months ago, the ignition switch has been working flawlessly, no more starting issues or error codes. The battery terminals are maintaining solid contact, and the electrical system is running smoothly. If you spot similar symptoms, having a professional check the entire ignition circuit is definitely worth the investment to prevent bigger problems down the road.

Found a reliable mechanic who diagnosed the issue correctly. Turned out the starter solenoid was fine, but there was a major voltage drop due to corroded wiring near the ignition switch. The power supply connections needed thorough cleaning and some rewiring work. Total repair cost was 280 Euro which included replacing a section of the main power circuit that had deteriorated. The mechanic showed me where the circuit break was happening and explained how it was affecting the whole ignition system. Been running great for the past two weeks with no error codes or starting problems. Really glad I got a second opinion instead of going back to that first shop. Sometimes paying a bit more for proper diagnosis saves money in the long run.

Found a reliable mechanic who diagnosed the issue correctly. Turned out the starter solenoid was fine, but there was a major voltage drop due to corroded wiring near the ignition switch. The power supply connections needed thorough cleaning and some rewiring work. Total repair cost was 280 Euro which included replacing a section of the main power circuit that had deteriorated. The mechanic showed me where the circuit break was happening and explained how it was affecting the whole ignition system. Been running great for the past two weeks with no error codes or starting problems. Really glad I got a second opinion instead of going back to that first shop. Sometimes paying a bit more for proper diagnosis saves money in the long run.