POST UPDATED IN February, 2023

P1495 Code failures by brands


Description of DTC code P1495

The EVAP System (Evaporative Emissions System) avoids the exhaust vapors go into the environment, so the pollution is reduced. This system detects leaks and checks for blockages.

On the other hand, throughout its self-diagnostics, the PCM previously inspects the LDP (Leak Detection Pump) for mechanical or electrical faults inside the EVAP. If the first checks are passed, the PCM uses the pump to seal the vent valve. Consequently, it pumps air into the system to be pressurized.

When leaks are detected, the PCM will continue to pump the LDP to replace the escaping air. The same control module determines the severity of the leak by considering how fast/long to pump the LDP while attempting to maintain system pressure. If the PCM has noticed that the pump solenoid has not changed its state when this is activated, the P1495 OBD2 fault code will be stored.

Symptoms of fault code P1495

Causes of OBD2 P1495

The P1495 OBDII diagnostic code is set for one of the following reasons:

  • EVAP Leak Detection Pump cables or connectors may be damaged.
  • The LPD circuit may have poor voltage causing an open circuit.
  • The Leak Detection Pump may be faulty.

Possible solutions of the DTC code P1495

Steps to solve the OBD2 DTC P1495:

  • First, consult the TSBs (Technical Service Bulletins).
  • Check that all EVAP Leak Detection Pump circuit wiring and connectors are in good condition. If you discover deficiencies due to burns or corrosion, make the appropriate corrections.
  • Verify that the LPD circuit is working properly. Measure the power supply and the reference voltage. Check that these values match those specified by the manufacturer. If you find an out-of-range value, make the necessary repairs.


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