P0093 on Genesis: How to Diagnose & Fix
Fuel System Leak Detected - Large Leak
1 Genesis model · 1 documented issue · 1 critical
P0093 on Genesis by model: symptoms, diagnosis and fix
The fuel control valve inside the high-pressure fuel pump (HPFP) can stick or allow excess fuel into the system, producing an air/fuel mixture that runs too rich. This causes a reduction or loss of motive power at low speeds, rough running, and check-engine warnings — increasing crash risk. Genesis recalled certain 2019-2023 G70 vehicles under NHTSA campaign 24V-528 (Genesis recall 023G); owner letters mailed September 2024. Many owners also reported the symptom (hesitation/near-stall when driving off within ~30 seconds of a cold start) before the formal recall. The remedy is an ECM software update plus inspection and replacement of the HPFP assembly as necessary, performed free of charge under the recall.
Common Symptoms
- Loss of power or hesitation accelerating from a stop or at low speed
- Engine wants to stall if you drive off within ~30 seconds of starting
- Rough running / engine surging
- Check engine light, sometimes with a fuel-rail-pressure code
- Long crank or hard start
How to Fix
First verify the VIN against Recall 24V-528 (023G) — the fix is free under recall. Dealers apply an updated ECM/engine-control software calibration and inspect the high-pressure fuel pump, replacing the pump assembly if it fails inspection. Out of warranty/recall, the OEM HPFP is replaced; the 3.3T uses Hyundai/Genesis pump 35320-3L000 and the 2.0T uses 35320-2CTB1. After replacement, clear codes and confirm fuel-rail pressure is within spec.
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Sources for this issue (1)
P0093 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 P0093 mean on a Genesis?
P0093 stands for "Fuel System Leak Detected - Large Leak." This code indicates the engine computer detected a large leak in the fuel system, typically a significant drop in fuel rail pressure that it cannot maintain. It is common on high-pressure direct-injection and diesel systems, where the computer watches commanded versus actual fuel pressure. A large pressure loss suggests fuel is escaping or the system cannot build pressure. This can cause hard starting, loss of power, stalling, and is a potential fire hazard if fuel is leaking externally. On Genesis it is documented across 1 model: G70.
What are the most common causes of P0093?
The most common causes of P0093 are: Leaking or cracked high-pressure fuel line or fitting, Faulty fuel injector (leaking or stuck open), Failed high-pressure fuel pump, Damaged or leaking fuel pressure regulator, Loose or degraded fuel system seals/O-rings, Faulty fuel rail pressure sensor, Restricted fuel supply preventing pressure buildup. The specific cause varies by vehicle.
How much does it cost to fix P0093 on a Genesis?
Repair costs vary widely with the root cause and Genesis model; each issue on this page carries its own estimate where one is published.
Looking for P0093 on a different make?
View P0093 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.