P1243: Second Fuel Pump Faulty or Ground Fault

What does P1243 mean?

P1243 is a diagnostic trouble code indicating "Second Fuel Pump Faulty or Ground Fault". This code relates to your vehicle's fuel system and should be diagnosed to determine the root cause. The severity level helps indicate how urgently this should be addressed.

Symptoms you may notice

• Check engine light (MIL) illuminated on dashboard
• Poor fuel economy
• Rough idle
• Hesitation during acceleration

Common causes

• Faulty fuel system component
• Wiring or connector issue in the related circuit
• Failed sensor providing incorrect readings
• Software/calibration issue requiring ECU update
• Related component causing secondary fault

What should you do?

Schedule a diagnostic appointment at your earliest convenience. The vehicle is generally safe to drive short distances, but the underlying issue should be addressed to prevent it from worsening.