p1473 evap control system ldp open circuit
P1473 EVAP Control System LDP Open Circuit
- OBD2 Code: P1473
- Description: EVAP Control System LDP (Leak Detection Pump) Open Circuit
- Definition: This code indicates that there is an open circuit in the Leak Detection Pump of the Evaporative Emission Control System, which may affect the vehicle’s ability to detect fuel vapor leaks.
P1473 – Evap Control System LDP Open Circuit
Typical severity: Moderate
Common Causes
P1473 – Evap Control System LDP Open Circuit
Common Causes:
- Faulty Leak Detection Pump (LDP)
- Open or short circuit in the wiring to the LDP
- Corrosion or poor connection at the LDP connector
- Fuel tank pressure sensor malfunction
Common Misdiagnosis
OBD2 Code: P1473
Description: EVAP Control System LDP Open Circuit
Common Misdiagnosis: Replacing the Leak Detection Pump (LDP) without checking for wiring issues or connector problems.
Common Diagnostic Steps
OBD2 Code: P1473
Description: EVAP Control System LDP Open Circuit
- Check the LDP (Leak Detection Pump) electrical connector for corrosion or damage.
- Inspect the wiring harness and connectors for any signs of wear, damage, or disconnection.
- Test the voltage supply to the LDP using a multimeter to ensure it is receiving power.
- Verify the ground connection for the LDP is secure and free from corrosion.
- Use a scan tool to clear the code and perform a drive cycle to see if the code returns.
- If necessary, replace the Leak Detection Pump if it is found to be faulty after testing.