P1093 on Audi: How to Diagnose & Fix
Fuel Rail Pressure Low During Power Enrichment / Fuel Rail Pressure Too Low (manufacturer-specific)
1 Audi model · 1 documented issue · 1 critical
P1093 on Audi by model: symptoms, diagnosis and fix
Audi TSB 2013147/12 applies to 2005-2006 A4 vehicles with the BPG engine and 2007 A4 vehicles with the BWT engine when the MIL is on and P2293 is stored; P0087 or P1093 may accompany it. Audi’s procedure checks fuel pressure and wear at the cam follower, intake camshaft lobe and high-pressure fuel pump. The documents do not publish a universal inspection interval and state the covered condition does not cause stalling.
Common Symptoms
- MIL caused by the diagnosed camshaft/cam-follower/HPFP wear condition
How to Fix
Verify BPG or BWT engine fitment, record the MIL faults and measured fuel-pressure behavior, then follow TSB 2013147/12. Inspect the cam follower and cam lobe and replace only the follower, camshaft and/or high-pressure fuel pump selected by the bulletin’s conditional tree. The 10-year/120,000-mile extension is historical and generally expired; do not promise coverage or buy a parts kit from this record.
Sources for this issue (2)
P1093 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 P1093 mean on a Audi?
P1093 stands for "Fuel Rail Pressure Low During Power Enrichment / Fuel Rail Pressure Too Low (manufacturer-specific)." P1093 is a manufacturer-specific powertrain code indicating insufficient fuel rail pressure. On GM gasoline applications it is typically 'Fuel Rail Pressure Low During Power Enrichment,' meaning the rail could not maintain the pressure the computer commanded during hard acceleration. On many diesel and other applications it is reported as 'Fuel Rail Pressure Too Low' or a fuel rail pressure sensor circuit fault. Low rail pressure can cause hesitation, power loss, and potential lean operation, so it should be addressed promptly. On Audi it is documented across 1 model: A4.
What are the most common causes of P1093?
The most common causes of P1093 are: Weak or failing fuel pump (lift or high-pressure pump), Clogged fuel filter or restricted fuel supply line, Faulty fuel pressure regulator, Faulty fuel rail pressure sensor or wiring, Leaking or returning fuel injectors, Low fuel volume / restricted fuel delivery under load, Air or leaks in the fuel system. The specific cause varies by vehicle.
How much does it cost to fix P1093 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 P1093 on a different make?
View P1093 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.