2014 Audi S4 Problems

The contact owns a 2014 Audi S4. The contact stated that while driving at 70 MPH, he observed multiple unknown warning lights illuminated. The EPC warning light was also illuminated. The contact stated that the “Do Not Drive" message was displayed. Additionally, the contact stated that the steering wheel was stiff and failed to steer as intended. The vehicle was taken to the dealer where it was diagnosed that the electronic steering module and rack needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 61,000.

THE VEHICLE EXHIBITS "NOTCHY" STEERING AT HIGHWAY SPEEDS, PARTICULARLY IN COLD WEATHER. AT OR ABOVE APPROXIMATELY 55 MPH, THE STEERING WHEEL TRIES TO "BOUNCE" LEFT AND RIGHT RATHER THAN MAINTAINING CENTER--EVEN WHEN TRAVELING ON A STRAIGHT, FRESHLY-PAVED SECTION OF INTERSTATE. THE DRIVER HAS TO CONSTANTLY ADJUST THE WHEEL TO KEEP THE CAR TRAVELING STRAIGHT. THE STEERING FUNCTIONS NORMALLY OTHERWISE, AND THE PROBLEM DOES NOT MANIFEST ITSELF AT LOW SPEEDS. I BEGAN TO NOTICE THE PROBLEM AROUND AUGUST OF 2020. OTHER OWNERS OF THE SAME VEHICLE HAVE REPORTED SIMILAR PROBLEMS: HTTPS://WWW.AUDIZINE.COM/FORUM/SHOWTHREAD.PHP/690756-NOTCHY-STEERING.

MY 2014 AUDI S4 HAS A EPC LIGHT THAT KEEPS TURNING ON WHILE DRIVING THAT CAR. THE EPC LIGHT WILL PUT THE CAR INTO LIMP MODE AND WILL HAVE A ROUGH IDLE AND CAN BARLEY DRIVE. WHEN THAT LIGHT TURNS ON YOU HAVE TO PULL OVER IMMEDIATELY AND RESTART THE CAR TO CONTINUE DRIVING AND IS A COMPLETE SAFETY HAZARD BECAUSE IT WILL HAPPEN WHEN YOU ARE ON THE FREEWAY. THE LIGHT MAINLY TURNS ON WHEN YOU ARE TRYING TO GET UP TO SPEEDS OF THE FLOW OF TRAFFIC. I HAVE TAKEN IT TO THE DEALER MANY TIMES TO GET THIS ISSUE RESOLVED AND THEY KEEP SAYING THERE IS NO ISSUE WITH THE CAR WHAT'S SO EVER. I DECIDED TO TRY TO FIGURE OUT WHAT WAS WRONG WITH THE CAR MYSELF BECAUSE THE DEALER WAS NO HELP. WHEN I LOOK IT UP HUNDREDS OF FORUMS SHOW UP TALKING ABOUT IT AND NO ONE CAN FIGURE OUT WHAT IS GOING ON WITH THE CAR AND EVERYONE IS HAVING THE SAME ISSUE AND HOW THE DEALER IS NO HELP AT ALL. ONE PERSON SAID THEY TOOK IT TO THE DEALER AND THERE WAS A FAULTY WIRE ON THE ECU. I THINK ITS THE ECU FAILING AND DOESN'T KNOW WHAT TO DO.

WHILE TRAVELING AT 75MPH, UPHILL, IN 100F WEATHER THE FUEL LOW PRESSURE FUEL SYSTEM DEVELOPED A VAPOR BUBBLE THAT STALLED THE LOW PRESSURE FUEL PUMP AND STARVED THE MOTOR FOR FUEL. THE CAR STALLED ON THE FREEWAY AND WOULD INTERMITTENTLY RESTART UNTIL THE LOW PRESSURE FUEL PUMP FAILED. THE REPAIR REQUIRED ADDITIONAL VALVES AND HOSES HE ADDED TO THE LOW PRESSURE FUEL SYSTEM TO COMPENSATE FOR THE POOR VAPOR MANAGEMENT DESIGN. THE CAR HAD TO BE TOWED TO A DEALERSHIP WHERE THE APPROPRIATE FIX AND TSB WAS EXECUTED. TOTAL COST WAS ~$2200, $715 OF THAT TOTAL COST WERE THE NEW VALVES AND HOSES THAT SHOULD HAVE BEEN PART OF THE INITIAL DESIGN.

I HAVE ENCOUNTERED THE PROBLEM OF AIR BUBBLE FORMATION IN MY FUEL SYSTEM (CODE 16903) WHEN READING CODES IN MY CAR. I THOUGHT IT WAS JUST A FUEL PUMP ISSUE SO I REPLACED IT. I THEN REALIZED IT WASN'T JUST A PUMP ISSUE AS THE CAR KEPT READING THOSE CODES AND KEPT STOPPING. I TALKED TO A LOCAL AUDI DEALERSHIP AND SAID I WOULD HAVE TO GET THE FUEL PUMP VAPOR EXTENSION. WHEN ASKED THEY SAID THAT IT'S ONLY A TSB NOT A RECALL DUE TO IT NOT BEING A SAFETY ISSUE. NOW YOU TELL ME, MY CAR WENT INTO LIMP MODE AND STOPPED ONCE IN THE MIDDLE OF THE HIGHWAY, AND 3 TIMES IN THE MIDDLE OF TRAFFIC 2 WEEKS LATER. I BELIEVE IT'S A SAFETY PROBLEM AS ANYONE COULD'VE RAN INTO ME AND CAUSED BIGGER PROBLEMS. I DON'T THINK I SHOULD PAY 800 DOLLARS FOR MY SAFETY. THAT PIECE SHOULD'VE BEEN INCLUDED IN THE FUEL PUMP ASSEMBLY FROM THE BEGINNING. FROM MY PERSPECTIVE AND THE EVENTS THAT UNFOLDED, THIS IS A SAFETY PROBLEM AND MY CAR NEEDS TO BE FIXED ACCORDINGLY.

WHILE TRAVELING AT 75MPH, UPHILL, IN 100F WEATHER THE FUEL LOW PRESSURE FUEL SYSTEM DEVELOPED A VAPOR BUBBLE THAT STALLED THE LOW PRESSURE FUEL PUMP AND STARVED THE MOTOR FOR FUEL. THE CAR STALLED ON THE FREEWAY AND WOULD INTERMITTENTLY RESTART UNTIL THE LOW PRESSURE FUEL PUMP FAILED. THE REPAIR REQUIRED ADDITIONAL VALVES AND HOSES HE ADDED TO THE LOW PRESSURE FUEL SYSTEM TO COMPENSATE FOR THE POOR VAPOR MANAGEMENT DESIGN. THE CAR HAD TO BE TOWED TO A DEALERSHIP WHERE THE APPROPRIATE FIX AND TSB WAS EXECUTED. TOTAL COST WAS ~$2200, $715 OF THAT TOTAL COST WERE THE NEW VALVES AND HOSES THAT SHOULD HAVE BEEN PART OF THE INITIAL DESIGN.

MY 2014 AUDI S4 HAS A EPC LIGHT THAT KEEPS TURNING ON WHILE DRIVING THAT CAR. THE EPC LIGHT WILL PUT THE CAR INTO LIMP MODE AND WILL HAVE A ROUGH IDLE AND CAN BARLEY DRIVE. WHEN THAT LIGHT TURNS ON YOU HAVE TO PULL OVER IMMEDIATELY AND RESTART THE CAR TO CONTINUE DRIVING AND IS A COMPLETE SAFETY HAZARD BECAUSE IT WILL HAPPEN WHEN YOU ARE ON THE FREEWAY. THE LIGHT MAINLY TURNS ON WHEN YOU ARE TRYING TO GET UP TO SPEEDS OF THE FLOW OF TRAFFIC. I HAVE TAKEN IT TO THE DEALER MANY TIMES TO GET THIS ISSUE RESOLVED AND THEY KEEP SAYING THERE IS NO ISSUE WITH THE CAR WHAT'S SO EVER. I DECIDED TO TRY TO FIGURE OUT WHAT WAS WRONG WITH THE CAR MYSELF BECAUSE THE DEALER WAS NO HELP. WHEN I LOOK IT UP HUNDREDS OF FORUMS SHOW UP TALKING ABOUT IT AND NO ONE CAN FIGURE OUT WHAT IS GOING ON WITH THE CAR AND EVERYONE IS HAVING THE SAME ISSUE AND HOW THE DEALER IS NO HELP AT ALL. ONE PERSON SAID THEY TOOK IT TO THE DEALER AND THERE WAS A FAULTY WIRE ON THE ECU. I THINK ITS THE ECU FAILING AND DOESN'T KNOW WHAT TO DO.

WHILE TRAVELING AT 75MPH, UPHILL, IN 100F WEATHER THE FUEL LOW PRESSURE FUEL SYSTEM DEVELOPED A VAPOR BUBBLE THAT STALLED THE LOW PRESSURE FUEL PUMP AND STARVED THE MOTOR FOR FUEL. THE CAR STALLED ON THE FREEWAY AND WOULD INTERMITTENTLY RESTART UNTIL THE LOW PRESSURE FUEL PUMP FAILED. THE REPAIR REQUIRED ADDITIONAL VALVES AND HOSES HE ADDED TO THE LOW PRESSURE FUEL SYSTEM TO COMPENSATE FOR THE POOR VAPOR MANAGEMENT DESIGN. THE CAR HAD TO BE TOWED TO A DEALERSHIP WHERE THE APPROPRIATE FIX AND TSB WAS EXECUTED. TOTAL COST WAS ~$2200, $715 OF THAT TOTAL COST WERE THE NEW VALVES AND HOSES THAT SHOULD HAVE BEEN PART OF THE INITIAL DESIGN.

THE PASSENGER AIRBAG OFF INDICATOR LIGHT IS ON. CHECKED WITH AUDI AND THEY ARE SAYING THE PASSENGER OCCUPANT DETECTION SYSTEM NEEDS TO BE REPLACED. EAXCT SAME ISSUE AS THE AUDI RECALL 74D5

BRAKES LIGHT CAME ON AND PADS ARE WORN AND ROTORS ARE WARPED AT ONLY 16,000 MILES. HAD THE AUDI DEALER IN WESTLAKE VILLAGE, CALIFORNIA REPLACES BOTH PADS AND ROTORS. SEVEN MONTHS AND 8,000 MILES LATER, WHILE DOING THE MAINTENANCE OIL CHANGE, A DIFFERENT AUDI DEALER IN WOODLAND HILLS, CA NOTIFIED THAT BRAKE PADS ARE WORN AT 4MM AND ROTORS ARE WARPED. THIS WEAR OUT PATTERN IS BEYOND THE MINIMUM EXPECTATION OF THE LIFE OF THE BRAKES UNDER AVERAGE DRIVING CONDITION. BRAKES PADS ARE WORN TOO SOON, AND I DON'T UNDERSTAND WHY THE ROTORS ARE ALSO WARPED AND NEEDED REPLACING TOO FREQUENT. I LIVE IN SOUTHERN CALIFORNIA, WITH NORMAL DRIVING CONDITION, 60% FREEWAY AND 40% SURFACE STREET, I HAVE NEVER HAD BRAKES WORN OUT THIS QUICKLY IN ALL OF MY PREVIOUS 5 CARS. AUDI DEALER AUTOMATICALLY BLAME MY DRIVING CONDITIONS AND SAID THIS IS A WEAR AND TEAR ITEM. I FEEL THEY SOLD ME A DEFECTIVE PRODUCT AND THIS CAR IS A LEMON, BUT AUDI REFUSE TO TAKE IT BACK.

2014 AUDI S4 HAS DANGEROUS STEERING BEHAVIOR. THE STEERING SLIPS AT THE CENTER POSITION, WILL NOT GO STRAIGHT ON THE HIGHWAY, AND REQUIRES CONSTANT STEERING INPUT. THIS IS FURTHER EXACERBATED BY A CONSTANT NOTCHY FEELING AT ANY SPEED BETWEEN THE 10 AND 2 OCLOCK POSITION. IT IS PARTICULARLY BAD IN LONG SWEEPING TURNS WHERE YOU CAN DISTINCTLY FEEL A NOTCH. WHEN IN ONE OF THESE TURNS YOU WILL HAVE CONSTANT LINEAR STEERING FOLLOWED BY A NOTCH THAT WHEN SURPASSED RESULTS IN A LARGE STEERING INPUT WHICH IS UNEXPECTED AND DESTABILIZING TO THE VEHICLE IF AT HIGH SPEEDS. THE PROBLEM IS WORSE DURING COLD TEMPERATURES. THIS IS INTERMITTENT BUT REPEATABLE AND IS A KNOWN ISSUE ON ALL 2013+ S4 & S5 MODELS WITH THE ELECTRIC POWER STEERING. AUDI SHOULD BE REQUIRED TO COME UP WITH A PERMANENT AND SAFE SOLUTION AS THIS IS VERY DANGEROUS. ALSO, AUDIS DRIVER STEERING RECOMMENDATION (DSR) MAKES THE PROBLEM WORSE. DSR IS AN ELECTRONIC PROGRAM THAT DETECTS WHEN THE CAR IS STARTING TO SKID AND THE STEERING'S ECU PROVIDES A PROMPT TO THE DRIVER TO CORRECT THE PROBLEM BY MAKING THE STEERING WHEEL MOVE SLIGHTLY (BUMP). THIS I PARTICULARLY BAD IN WINTER DRIVING CONDITIONS IN WHICH THE CAR HAS LIMITED TRACTION DUE TO SNOW AND ICE AND RESULTS IN CONTINUOUS BUMPING OF THE STEERING WHEEL. COMBINING DSR WITH THE STEERING SLIP + NOTCHY ISSUES RESULTS IN A VERY DANGEROUS STEERING SYSTEM WHICH NEEDS IMMEDIATE RESOLUTION.

2014 AUDI S4 HAS DANGEROUS STEERING BEHAVIOR. THE STEERING SLIPS AT THE CENTER POSITION, WILL NOT GO STRAIGHT ON THE HIGHWAY, AND REQUIRES CONSTANT STEERING INPUT. THIS IS FURTHER EXACERBATED BY A CONSTANT NOTCHY FEELING AT ANY SPEED BETWEEN THE 10 AND 2 OCLOCK POSITION. IT IS PARTICULARLY BAD IN LONG SWEEPING TURNS WHERE YOU CAN DISTINCTLY FEEL A NOTCH. WHEN IN ONE OF THESE TURNS YOU WILL HAVE CONSTANT LINEAR STEERING FOLLOWED BY A NOTCH THAT WHEN SURPASSED RESULTS IN A LARGE STEERING INPUT WHICH IS UNEXPECTED AND DESTABILIZING TO THE VEHICLE IF AT HIGH SPEEDS. THE PROBLEM IS WORSE DURING COLD TEMPERATURES. THIS IS INTERMITTENT BUT REPEATABLE AND IS A KNOWN ISSUE ON ALL 2013+ S4 & S5 MODELS WITH THE ELECTRIC POWER STEERING. AUDI SHOULD BE REQUIRED TO COME UP WITH A PERMANENT AND SAFE SOLUTION AS THIS IS VERY DANGEROUS. ALSO, AUDIS DRIVER STEERING RECOMMENDATION (DSR) MAKES THE PROBLEM WORSE. DSR IS AN ELECTRONIC PROGRAM THAT DETECTS WHEN THE CAR IS STARTING TO SKID AND THE STEERING'S ECU PROVIDES A PROMPT TO THE DRIVER TO CORRECT THE PROBLEM BY MAKING THE STEERING WHEEL MOVE SLIGHTLY (BUMP). THIS I PARTICULARLY BAD IN WINTER DRIVING CONDITIONS IN WHICH THE CAR HAS LIMITED TRACTION DUE TO SNOW AND ICE AND RESULTS IN CONTINUOUS BUMPING OF THE STEERING WHEEL. COMBINING DSR WITH THE STEERING SLIP + NOTCHY ISSUES RESULTS IN A VERY DANGEROUS STEERING SYSTEM WHICH NEEDS IMMEDIATE RESOLUTION.

MY 2014 AUDI S4 HAS A EPC LIGHT THAT KEEPS TURNING ON WHILE DRIVING THAT CAR. THE EPC LIGHT WILL PUT THE CAR INTO LIMP MODE AND WILL HAVE A ROUGH IDLE AND CAN BARLEY DRIVE. WHEN THAT LIGHT TURNS ON YOU HAVE TO PULL OVER IMMEDIATELY AND RESTART THE CAR TO CONTINUE DRIVING AND IS A COMPLETE SAFETY HAZARD BECAUSE IT WILL HAPPEN WHEN YOU ARE ON THE FREEWAY. THE LIGHT MAINLY TURNS ON WHEN YOU ARE TRYING TO GET UP TO SPEEDS OF THE FLOW OF TRAFFIC. I HAVE TAKEN IT TO THE DEALER MANY TIMES TO GET THIS ISSUE RESOLVED AND THEY KEEP SAYING THERE IS NO ISSUE WITH THE CAR WHAT'S SO EVER. I DECIDED TO TRY TO FIGURE OUT WHAT WAS WRONG WITH THE CAR MYSELF BECAUSE THE DEALER WAS NO HELP. WHEN I LOOK IT UP HUNDREDS OF FORUMS SHOW UP TALKING ABOUT IT AND NO ONE CAN FIGURE OUT WHAT IS GOING ON WITH THE CAR AND EVERYONE IS HAVING THE SAME ISSUE AND HOW THE DEALER IS NO HELP AT ALL. ONE PERSON SAID THEY TOOK IT TO THE DEALER AND THERE WAS A FAULTY WIRE ON THE ECU. I THINK ITS THE ECU FAILING AND DOESN'T KNOW WHAT TO DO.