P1093 on Audi
Fuel Rail Pressure Low During Power Enrichment / Fuel Rail Pressure Too Low (manufacturer-specific)
P1093 on Audi vehicles indicates fuel rail pressure low during power enrichment / fuel rail pressure too low (manufacturer-specific). Au7o has documented this code across 1 Audi model — most commonly on A4. 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. Typical repair costs on Audi range from $150 to $2,500, depending on the specific model and root cause.
Common Causes of P1093
- •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
P1093 on Audi by Model
Audi A4(1 issue)
- 2.0T Cam Follower and High-Pressure Fuel Pump Wear Leading to Fuel Pressure Loss and Camshaft Damage2005-2008
The B7 A4 2.0T FSI is widely known for wear of the cam follower that rides between the intake cam lobe and the high-pressure fuel pump. If the follower coating wears through, it can damage the pump plunger and camshaft, causing fuel pressure faults, drivability problems, and expensive top-end repairs. This issue is heavily documented in TSB-related service discussions, owner forums, and repair guides because periodic inspection can prevent major damage.
Looking for P1093 on a different make?
View P1093 across all makes →Frequently Asked Questions
What does P1093 mean on 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 specifically, this code is documented across 1 model.
What causes P1093 on Audi vehicles?▼
Common causes on Audi: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P1093 on a Audi?▼
Repair costs on Audi range from $150 to $2,500, depending on the specific model and root cause.
Which Audi models have P1093 documented?▼
Au7o has documented P1093 on 1 Audi model: A4.