P0700 on Audi: How to Diagnose & Fix
Transmission Control System Malfunction
3 Audi models · 3 documented issues · 3 critical · $1,500-$6,000 repair
P0700 on Audi by model: symptoms, diagnosis and fix
The 2013 settlement covered U.S. 2002-2006 A4 vehicles originally equipped with a factory-installed CVT. It used component-specific branches: TCM for 2003-2006; valve body for 2003-2004; and transmission without valve body/TCM for 2002-2004, subject to maintenance proof. Plaintiffs alleged improper function, while defendants denied defect, wrongdoing and liability and the court did not decide the merits. Not every CVT symptom means the transmission has failed.
How to Fix
Verify the VIN, original U.S. factory-CVT equipment, transmission code, faults, fluid/maintenance records and reproducible behavior. Diagnose the TCM, valve body and mechanical transmission separately and replace only the confirmed component. The historical 10-year/100,000-mile terms and November 18, 2013 reimbursement deadline are expired, so no coverage is available under them; do not buy a TCM, valve body or transmission before the faulty component is confirmed.
Sources for this issue (1)
The Multitronic CVT used in front-wheel drive A4 Avants is prone to premature failure of the chain, pulleys, and control unit. This transmission has a poor reliability record and is expensive to repair.
Common Symptoms
- Shuddering
- Loss of drive
- Jerking during acceleration
- Transmission warning light
How to Fix
Diagnose with a VAG-specific scan tool before replacing parts: many failures are in the transmission control module, which can be repaired or replaced on its own. Chain, pulley or valve-body wear requires a transmission rebuild or exchange unit. In the US, a 2013 class-action settlement extended coverage of 2002-2006 A4 CVT parts to 10 years/100,000 miles, a window that has now expired for these cars.
Sources for this issue (2)
The 2002-2003 S6 (C5, 4.2 V8) uses the ZF 5HP24A five-speed Tiptronic automatic, the all-wheel-drive (quattro) version of the 5HP24. As these transmissions wear, clearance grows between the pressure regulator valve and its bore in the valve body, and line pressure becomes erratic. Pressure spikes cause harsh or banging shifts and a bang on kick-down, and they can break clutch drum "A". A broken drum A shows up as hesitation at takeoff or a failure to engage a forward gear. If pressure leaks away instead, shifts go soft and the clutches can burn. Bore wear can also set slip codes, and the transmission can drop into limp mode. An enthusiast review of these cars calls the transmission a known weak spot.
Common Symptoms
- Harsh or banging shifts
- Bang on kick-down
- Hesitation at takeoff or no forward gear
- Transmission limp mode
- Gear hunting on hills
How to Fix
What to check first: 1) Scan the transmission control module for stored faults. Slip codes and forward slip are among the signs of pressure regulator valve bore wear. 2) Check the ATF level and condition. The 5HP24 is specified for ZF Lifeguard fluid (Lifeguard A / Lifeguard 5), so do not top up with generic ATF. Burnt fluid can mean the clutches have already been damaged by low line pressure, so the problem is more than a valve body fault. 3) Note when the problem happens. Harsh or banging shifts and a bang on kick-down point to the pressure regulator valve. Hesitation at takeoff, or no forward gear at all, can mean clutch drum "A" is already broken. Repair path: if the clutches and drum are healthy, a transmission shop can recondition the valve body. The worn pressure regulator valve bore is the usual target, and aftermarket repair kits are made for it (Sonnax 1767 oversized pressure regulator valve kit for the ZF5HP24/24A, TransGo 5HP-24-PR). If drum "A" is broken, the drum, the pressure regulator valve and the lower valve body all have to be replaced. Ask the shop whether the quote covers only the valve body or also includes the drum. We found no Audi recall or warranty extension that covers this transmission on these cars.
Sources for this issue (7)
- Audi ElsaWeb Model Listing - 4B6 S6 Avant 2002-2003manual
- 2003 Audi S6 Avant - 'transmissions are a known weak spot on these'forum
- 2002 Audi S6 Avant - 'the weak Tiptronic transmission'forum
- ZF 5HP transmission - Wikipediareference
- Sonnax 1767 oversized pressure regulator valve kit (ZF5HP24/24A)parts
- TransGo 5HP-24-PR ZF5HP-24 pressure regulator repair kitparts
- ZF 5HP24 Transmission Problems & Specsarticle
P0700 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0700 mean on a Audi?
P0700 stands for "Transmission Control System Malfunction." P0700 is a general code indicating the transmission control module (TCM) has detected a fault somewhere in the transmission control system and has requested the check engine light be turned on. By itself it doesn't pinpoint the problem — it's an 'umbrella' code that tells you to look for additional, more specific transmission codes stored alongside it. The actual fault could be electrical, a sensor, a solenoid, or an internal transmission issue. You may notice harsh or delayed shifts, slipping, or the transmission going into a protective 'limp' mode. On Audi it is documented across 3 models: A4, A4 Avant, S6.
What are the most common causes of P0700?
The most common causes of P0700 are: Stored companion transmission codes pointing to the real fault, Faulty shift solenoid or pressure control solenoid, Low, dirty, or degraded transmission fluid, Faulty transmission speed or input/output sensor, Wiring, connector, or ground problems at the transmission, Failing transmission control module (TCM), Internal transmission mechanical wear or clutch problems, Valve body fault or sticking valves. The specific cause varies by vehicle.
How much does it cost to fix P0700 on a Audi?
Published repair estimates on Audi range from $1,500 to $6,000 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.