P0000 on Audi: How to Diagnose & Fix
No Fault Found / ISO-SAE Reserved
1 Audi model · 1 documented issue
P0000 on Audi by model: symptoms, diagnosis and fix
Audi TSB 2058890/4 applies to 2018 S5, S5 Cabriolet and S5 Sportback vehicles when the instrument cluster displays “Switch off the engine and check coolant” and the engine control module stores P000000 with symptom code 33688. The code indicates a possible malfunction of the vacuum-switchable mechanical coolant pump on the 3.0L V6 TFSI EA839. The bulletin does not support the former 2.9T label, a universal internal coolant leak, coolant migration into the brake booster or wastegate actuators, or a fixed failure mileage.
Common Symptoms
- “Switch off the engine and check coolant” message in the instrument cluster
How to Fix
Follow the bulletin in order. Verify coolant level; if low, inspect the cooling system for a leak and repair only the identified source or top up per Audi instructions when no leak is found. Check the ECM software level and apply the specified SVM update only when required. If the concern returns or software is current, test vacuum at N649 and inspect the solenoid and hoses. If the vacuum system works, apply vacuum to the pump hose and verify that the pump sleeve clicks; replace the mechanical coolant pump only when the sleeve does not operate. Use current Audi workshop and parts information.
Sources for this issue (1)
P0000 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 P0000 mean on a Audi?
P0000 stands for "No Fault Found / ISO-SAE Reserved." P0000 is a reserved placeholder in the ISO/SAE code range meaning "no diagnostic trouble code reported." It is not a real defect code - a module or scan tool returns it when no fault is stored, when a memory slot is empty, or as a filler in a data record. It is important to read it correctly: if the malfunction indicator lamp is actually illuminated and a generic scanner returns only P0000, the far more likely explanation is that the tool could not communicate with the module that holds the real fault, not that the vehicle is healthy. On VW/Audi this is common because generic OBD-II tools cannot reach most manufacturer-specific modules - a VAG-capable tool (VCDS/ODIS/OBDeleven) is needed to see the actual stored codes. On Audi it is documented across 1 model: S5.
What are the most common causes of P0000?
The most common causes of P0000 are: Genuinely empty fault memory - nothing is wrong, Scan tool could not establish communication with the control module, Generic OBD-II scanner used on a manufacturer-specific module (very common on VW/Audi), Fault memory cleared immediately before the scan, before any monitor could run, Placeholder entry inside a longer diagnostic data record. The specific cause varies by vehicle.
How much does it cost to fix P0000 on a Audi?
Repair costs vary widely with the root cause and Audi model; each issue on this page carries its own estimate where one is published.
Looking for P0000 on a different make?
View P0000 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.