A vehicle diagnostic scan dated 04/15/2026 at approximately 88,502 miles showed a stored transmission electronics fault: P084100, described as “Transmission fluid pressure sensor/switch A range/performance,” with status listed as passive/sporadic. This indicates a transmission / powertrain control concern involving the transmission fluid pressure sensor, transmission electronics, wiring, control logic, pressure monitoring, or related powertrain components. The vehicle also has prior transmission/powertrain history, including a March 2023 transmission-pan-gasket concern documented in service records, so this later transmission electronics fault is being reported in that broader powertrain context. This is being reported as a safety concern because a transmission fluid pressure sensor or transmission-control fault can affect shifting, drivability, delayed engagement, slipping, harsh shifting, limp mode, reduced power, drivetrain damage, or loss of propulsion while driving. Even if the fault is intermittent, a transmission-control issue may create an unsafe condition if it occurs in traffic or during acceleration, merging, turning, or normal driving. No crash, fire, injury, or fatality occurred. The vehicle/component is available for inspection, and the diagnostic scan report, transmission-related records, service records, manufacturer communications, and related communications are available if requested.
Audi A4 won't shift problems
20 of the 2,899 owner complaints about the Audi A4 describe stuck in gear or won't shift, most of them for the 2003 model year.
- owner complaints
- 20
- worst model year
- 2003
- typical repair cost reported
- $3,100
- typical mileage
- 62,000
By model year
- 20183
- 20102
- 20091
- 20082
- 20071
- 20063
- 20052
- 20036
Often reported together
Stalling 3Transmission failure 2Overheating 2Jerking 2CVT failure 2Check engine light 2Sudden acceleration 1Slipping 1
Trouble codes mentioned
P0706 1
What owners say
The vehicle displayed a low coolant warning and the coolant reservoir was low. Audi dealer service records dated on or about 02/14/2025 document the concern as: “client states low coolant warning was on, coolant reservoir is low, diagnose and advise.” The dealer performed coolant-related work involving the thermostat gasket / coolant hoses or connections to the coolant reservoir, ran the vehicle to operating temperature, and rechecked. The concern is being reported because the coolant loss/refill issue continued or remained unresolved afterward. The exact source of coolant loss is unknown, but it may involve the water pump, thermostat, coolant reservoir, coolant hoses/pipes, pressure loss, internal coolant leak, or coolant loss that evaporates before leaving visible residue. This is a safety concern because coolant loss can lead to overheating, warning messages, limp mode, loss of propulsion, engine damage, steam/smoke, or stall risk while driving. No crash, fire, injury, or fatality occurred. The vehicle/component is available for inspection, and Audi service records, coolant-system communications, photos, and water-pump/coolant-related documents are available.
The engine oil level has been gradually dropping and has required monitoring and/or adding oil between normal service intervals. The exact source is unknown. It may involve abnormal oil consumption, an external oil leak, internal engine oil consumption, PCV/oil separator issue, turbo-related oil consumption, gasket/seal issue, or oil loss that is not leaving an obvious visible puddle. This is being reported as a safety concern because low engine oil or abnormal oil loss can lead to low oil pressure, warning messages, engine overheating or damage, smoke, oil contacting hot engine/exhaust components, limp mode, stalling, or loss of propulsion while driving. The issue should be inspected rather than treated as normal maintenance unless a proper diagnosis confirms normal operation. No crash, fire, injury, or fatality occurred. The vehicle/component is available for inspection, and oil-level/refill records, repair records, photos, receipts, and service communications are available if requested.
My parking brake keeps setting itself and then locking in place and it will not unlock now my gear shift will not shift I have no idea what's going on and it keeps happening and then it'll stop and it'll happen again it's going to cause an accident and it burns up oil like crazy I'm going through so much oil it's not even funny
On Sunday December 19, 2021, while driving home the warning light for the battery/alternator flashed on with an associated beep warning. An estimated 30 miles later all electrical and motor functions died while I was in heavy traffic. I was able to pull off onto a narrow shoulder up a steep hill and park. All functions quit, I could not come out of "Park", the emergency brake switch would not release, the emergency flashers did not function. Nothing responded. I called AAA Towing service to be taken to an Audi service repair shop. The towing service had to use a jumper to provide electrical power to release the emergency brake and take the transmission out of "park." The repair service was the "Sport Hous Reno" where the alternator and the battery were replaced. Invoice # 4791, 12-21-2021, total $1,709.12. I do not expect the battery to be covered since it is expendable. However, the alternator malfunction and this model of Audi completely dying placed me in a dangerous situation where I or my family could have been seriously injured. This is not my first Audi, I did have a similar occurrence with another model and when the battery caused a malfunction the Audi computer went in "Limp Mode" and I was able to drive slowly to the dealership. This was not the case, when the electrical system failed it did not go into "Limp Mode," it completely "Died" placing me and my car in a dangerous position.
2003 audi a4 3.0 cabriolet convertible started shifting rough and hesitant and shut off, cranked back up went into limp mode and all the shifting gear lights came on r n d 2 , barely made it back home, put code reader on car had a lot of codes on it I reset codes but rnd2 lights still on , possible bad TCM?
My a4 randomly switches into neutral as I am driving down the highway. I have no control and have coasted to the shoulder of the road on one occasion when "drive" would not re-engage. My dashboard screen flashes over the prnd transmission indicators. The check engine light is on also, so I took the car to the audi dealer in south orlando. I was told that the transmission control module has gone bad and will cost $3100 to repair. The car also will not go into reverse about every 3rd or 4th time I select this gear. My research shows that this same problem was a recall on 2004-2006 models, so I would assume audi will recall this model year as well. My a4 has 62,000 miles on it and has been maintained by the dealer since new. I don't understand how this safety issue has not been elevated to a recall status already given the previous history of similar problems on the same models.
Car stuck in limp mode and car will jump at certain speeds
It happens when I turn the car on and I go to park it. When I pass reverse. It seems to happen a lot more often after it rains. My transmission is going into limp mode due to a major fault. Code p0706: transmission range sensor circuit range/performance the transmission range sensor tells the TCM the position of the gear lever. It also contains a neutral safety switch, which ensures that you can only start your car in neutral or park. Potential causes for this code to set are: faulty transmission range sensor misadjusted transmission range sensor open or shorted transmission range sensor harness faulty PCM it happens to a lot of the a4 audi's. Its dangerous and its not anything that owners of the audis did or did not do. I have never neglected my car. It is something that is enevatable because it was caused during the manufacturing.
Stopped at stop light in rush hour traffic. Light turned green. Attempted to accelerate- but car just jerked and rocked back and forth and then rolled backward- almost rolling into car behind me. Had to call 911 to redirect traffic and get a tow truck. 2nd incident occurred on 7/12/14: picked car up from service shop. Driving home in rush hour traffic. Stalled at traffic light. Restarted car and it was able to move, but wouldn't shift. Had to make an illegal u-turn to get out of traffic and was able to pull off the side of the road. 3rd incident occurred on 8/12/14: pulling out of driveway and car stopped shifting. Stalled in driveway. Had to get towed and was found to have "no problem" as car was operating when arrived at the service shop. 9/9/14- driving to work in rush hour traffic. Going 35mph up a hill and car stopped shifting. Car was still moving (slowly) and I was able to pull into a residential driveway to get out of traffic. Car would not move after restarting. Tow truck came and towed to service center. All issues related to faulty CVT transmission that audi is aware of, but will not take responsibility for due to the car being over 10 years old (it was 10 years 6 months at the first incident). I have contacted audi USA to discuss these safety concerns with the car stalling in traffic and possible recalls that should be issued, but they have offered no assistance.
Related recalls
No recalls on record for this model year.
Questions about the Audi A4 won't shift
Which Audi A4 years have stuck in gear or won't shift problems?
The model years with the most reports are 2003 (6 complaints), 2006 (3 complaints) and 2018 (3 complaints).
How much does it cost to fix stuck in gear or won't shift on the Audi A4?
Owners who mentioned a price put the repair at about $3,100 (median of 5 complaints that include a dollar amount). Costs vary with mileage, warranty and where the work is done.
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