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 let excess fuel into the pump as its plunger gradually wears, 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 with the 2.0L turbocharged engine 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, with the HPFP also replaced if the check-engine light is already on, 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 replace the high-pressure fuel pump if the check-engine light is already on; the remedy pump has an updated fuel-control-valve plunger design. Out of warranty/recall, the OEM HPFP is replaced; the recall lists G70 2.0T pumps 35320-2CTB0 and 35320-2CTB1. After replacement, clear codes and confirm fuel-rail pressure is within spec.
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.
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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.