P0093

Fuel System Leak Detected - Large Leak

Fuel system pressure Generic OBD-II High

What it means

P0093 means the computer has detected a large leak in the fuel system, typically because fuel pressure drops or can't be maintained. This is one of the more serious fuel codes: a big leak can cause hard starting, stalling, or loss of power, and raw fuel escaping is a fire hazard. Because it combines a real drivability problem with a safety risk, the car should not be driven until the leak is found and repaired.

High

Can I keep driving? No — a large fuel leak is a safety hazard and can cause hard starting, stalling, or loss of power; stop driving and address it promptly.

Real-world scan data

Seen in

986

scans in the past year

Found in

0.2%

of scans

0.3%

of scans that found faults

Appears alongside · share of P0093 scans

P1093in 31.7% of scans

P0683in 23.7% of scans

P1191in 22.4% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Hard starting, stalling, or no-start
Loss of power or hesitation under load
Strong fuel smell or a visible fuel leak
Check-engine light on

Common causes

Most likely first

Damaged, cracked, or leaking fuel line or fittingLikely
Faulty fuel pressure regulator bleeding off pressureCommon
Leaking or stuck-open fuel injectorCommon
Failing high-pressure fuel pumpLess often
Loose or degraded seals at the fuel railLess often

How to diagnose & fix

Work through it in order

Stop and check for visible fuel leaks or fuel odor immediately — safety first.
Perform a fuel pressure test to confirm the system can't hold pressure.
Inspect fuel lines, fittings, rail, and injectors for leaks.
Check the fuel pressure regulator and high-pressure pump.
Repair or replace the leaking component, then verify pressure holds.

FAQ

Quick answers

Is it safe to drive with P0093?+

No — a large fuel leak is a fire and drivability risk. Have it towed or repaired before driving further.

Can I just clear P0093?+

Don't rely on clearing it; the leak is a physical fault that returns and stays a safety hazard until repaired.

Read & clear P0093 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX