P2542 — Low Pressure Fuel System Sensor Circuit High

What Does P2542 Mean?

P2542 is a diagnostic trouble code indicating: Low Pressure Fuel System Sensor Circuit High. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P2542

⚠️ Check Engine Light (MIL) illuminated
⚠️ Low Pressure Fuel System Sensor reading stuck at maximum value
⚠️ Related system operating erratically or in default mode
⚠️ Reduced engine performance

Common Causes

🔍 Short to voltage in Low Pressure Fuel System Sensor wiring harness
🔍 Corroded or water-damaged Low Pressure Fuel System Sensor connector
🔍 Faulty Low Pressure Fuel System Sensor outputting maximum voltage
🔍 Damaged wiring rubbing against metal components
🔍 ECM/PCM internal fault (rare)

Frequently Asked Questions

What does P2542 mean?

P2542 indicates: Low Pressure Fuel System Sensor Circuit High. The vehicle's computer has detected that the Low Pressure Fuel System Sensor is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P2542?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P2542 for extended periods may cause additional problems.

How much does it cost to fix P2542?

Repair costs for P2542 typically range from $20 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect and repair Low Pressure Fuel System Sensor wiring for short to voltage
🔧 Clean or replace corroded Low Pressure Fuel System Sensor connector
🔧 Replace faulty Low Pressure Fuel System Sensor

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P2542: Low Pressure Fuel System Sensor Circuit High