P1243
Second Fuel Pump Faulty Or Ground Fault
P1243 is an OBD-II diagnostic trouble code meaning: Second Fuel Pump Faulty Or Ground Fault. Common causes: malfunction of the second fuel pump, damage to the pump ground circuit. Estimated repair cost: $56–167.
Symptoms
- Unstable engine operation under load
- Loss of power during acceleration
- Difficulty starting the engine
- Floating idle speed
- Check Engine Light Illuminates
Causes
- Malfunction of the second fuel pump
- Damage to the pump ground circuit
- Oxidation of contacts in the fuel pump connectors
- Problems with the fuel pump relay
- Open or short circuit in wiring harness
How to Fix
- Check the operation of the second fuel pump
- Inspect the pump ground circuit for damage.
- Check the contacts in the fuel system connectors
- Test fuel pump relays and fuses
- Diagnose the fuel pump wiring harness
Related codes
Error P1243 by Vehicle Brand
FAQ
What does the P1243 code mean?
P1243 is an OBD-II diagnostic trouble code that indicates: Second Fuel Pump Faulty Or Ground Fault
What causes a P1243 error code?
The most common causes of P1243 include: Malfunction of the second fuel pump; Damage to the pump ground circuit; Oxidation of contacts in the fuel pump connectors; Problems with the fuel pump relay.
How do I fix a P1243 diagnostic trouble code?
To fix P1243: Check the operation of the second fuel pump. Inspect the pump ground circuit for damage.. Check the contacts in the fuel system connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1243?
Limited driving only, diagnose soon
How much does it cost to fix P1243?
The estimated repair cost for P1243 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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