P2543

Low Pressure Fuel System Sensor Circuit Intermittent

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Unstable engine idling
Reduced engine power
Dips during acceleration
Increased fuel consumption
Check Engine Light Illuminates

Causes

Low fuel pressure sensor malfunction
Open or short circuit in the sensor circuit
Oxidation of contacts in connectors
Problems with the low pressure fuel pump
Fuel pump relay malfunction

How to Fix

Check the integrity of the wiring to the sensor
Clean the contacts in the sensor connectors
Check the functionality of the low fuel pressure sensor
Check the operation of the low pressure fuel pump
Replace sensor if necessary

Related codes

P2540 P2541 P2542