P1495 on 2002 Town & Country Limited
Just bought this van last week. Had the code when we purchased it. It says that the leak detection pump solenoid circuit has a problem:
- Engine Light ON (or Service Engine Soon Warning Light)
- Possible a noticeable fuel odor caused by the release of fuel vapors
- Leak Detection Pump (LDP) harness is open or shorted
- Leak Detection Pump (LDP) poor electrical connection
- Faulty Leak Detection Pump (LDP)
P1495 CHRYSLER Description
The Evaporative emissions system is design to prevent the escape of fuel vapors from the fuel system. Leaks in the system, ca allow vapors to escape into the atmosphere. The leak detection system tests for EVAP system leaks and blockage.
During the self-diagnostics, the Powertrain Control Module (PCM) first checks the Leak Detection Pump (LDP) for electrical and mechanical faults. If the first checks pass, the PCM then uses the LDP to seal the vent valve and pump air into the system to pressurize it. If a leak is present, the PCM will continue pumping the LDP to replace the air that leaks out. The PCM determines the size of the leak based on how fast/long it must pump the LDP as it tries to maintain pressure in the system.
When is the code detected?
Malfunction is detected when the Powertrain Control Module (PCM) detected the pump solenoid did not change status when activated,
I have replaced the pump and had the battery disconnected the entire time. After I reconnected it and started the engine, the check engine light was still illuminated. Did the key-dance and have the same code. I checked the fused ignition output for voltage and it is steady system voltage. Checked the solenoid control circuit wire for both open and short conditions and it checked out. I did not check the sense circuit due to it being late last night and forgot. Would this error be present if there were a vacuum leak in the system? A visual check of the vacuum lines I could get my hands on did not show anything apparent.