P0093 on Jeep
Fuel System Leak Detected - Large Leak
P0093 on Jeep vehicles indicates fuel system leak detected - large leak. Au7o has documented this code across 1 Jeep model — most commonly on Grand Cherokee. 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.
Common Causes of P0093
- •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
P0093 on Jeep by Model
Jeep Grand Cherokee(1 issue)
- 3.0L EcoDiesel Bosch CP4 High-Pressure Fuel Pump Failure Sending Metal Debris Through Fuel System (Recall Z46)2014-2023
The Bosch CP4.2 high-pressure fuel pump on 3.0L EcoDiesel Grand Cherokees can fail catastrophically and grind metal debris into the fuel rails, lines, and injectors. Because the contamination spreads before symptoms appear, a single pump failure often ruins most of the high-pressure fuel system, and the engine can stall without the ability to restart — a stranding/crash risk. Stellantis issued recall FCA Z46 covering certain EcoDiesel Grand Cherokee (and Ram 1500) vehicles, replacing the pump and contaminated components. Repairs done out-of-warranty commonly run $3,000-$6,000 because the entire fuel system must be cleaned or replaced.
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View P0093 across all makes →Frequently Asked Questions
What does P0093 mean on Jeep?▼
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 Jeep specifically, this code is documented across 1 model.
What causes P0093 on Jeep vehicles?▼
Common causes on Jeep: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0093 on a Jeep?▼
Repair costs vary widely depending on the root cause and specific Jeep model.
Which Jeep models have P0093 documented?▼
Au7o has documented P0093 on 1 Jeep model: Grand Cherokee.