Faulty leak detection pump solenoid with an open or shorted internal coil; Damaged, chafed or corroded wiring between the pump and the powertrain control module; Corroded, loose or water-contaminated connector at the leak detection pump; Poor power supply or earth to the solenoid circuit, such as a blown fuse or relay feed fault (circuit layout depends on model and year); Internal driver fault in the powertrain control module; Outdated powertrain control module software where the manufacturer has issued a revision for this fault.

P1495

Leak Detection Pump Solenoid Circuit Open Or Shorted.

Jeep
Powertrain
Manufacturer code
Low severity

How this code is built

P: SystemPowertrain
1: Defined byThe manufacturer
4: AreaAuxiliary emission controls
95: FaultThe specific fault in that area

What it means

P1495 on a Jeep means the powertrain control module has found a fault in the electrical circuit that operates the leak detection pump (LDP) solenoid, which is part of the evaporative emission system's leak test. The module saw an open circuit or a short (to ground or voltage) when it commanded or monitored the solenoid. As a result the EVAP leak test cannot run properly and the warning light is normally turned on.

Symptoms

Malfunction indicator lamp on
EVAP monitor will not complete or shows not ready at an emissions test
Usually no change in driveability
Fuel smell around the car in some cases, if a vent or vapour line is also faulty
Possible difficulty refuelling if the vent side of the system is affected

Possible causes

Faulty leak detection pump solenoid with an open or shorted internal coillikely
Damaged, chafed or corroded wiring between the pump and the powertrain control modulelikely
Corroded, loose or water-contaminated connector at the leak detection pumplikely
Poor power supply or earth to the solenoid circuit, such as a blown fuse or relay feed fault (circuit layout depends on model and year)possible
Internal driver fault in the powertrain control modulerare
Outdated powertrain control module software where the manufacturer has issued a revision for this faultrare

How to diagnose

Read all stored and pending codes and record the freeze frame data, then note any other EVAP codes that may point to a common cause.
Visually inspect the leak detection pump, its vacuum and vapour lines, and the harness and connector for damage, water ingress, corrosion or rodent damage.
Check the relevant fuses and the power feed to the pump against the wiring diagram for your model and engine.
Disconnect the connector and check for bent, pushed-out or corroded terminals, and check the terminal tension.
Measure the solenoid coil resistance and compare it with the manufacturer's specification for your vehicle; an open or very low reading indicates a failed solenoid.
With the connector disconnected, test the wiring for continuity, and for shorts to earth and to voltage, between the pump and the control module.
Use a scan tool's bi-directional test, if supported, to command the solenoid and confirm it operates and the circuit responds.
Clear the code and road test, then confirm the EVAP monitor runs and completes without the fault returning.

How to fix

Replace the leak detection pump or its solenoid if the coil is open, shorted or out of specification.
Repair or replace damaged wiring and use proper sealed joints, and re-secure the harness away from heat and sharp edges.
Clean or replace the corroded or damaged connector and terminals.
Restore the power or earth supply by replacing the faulty fuse or repairing the cause of the blown fuse.
Update the powertrain control module software only if a manufacturer bulletin confirms it for this fault, or repair or replace the module if its driver is proven faulty.

Can I keep driving?

Low severity

The car can normally be driven as the fault only affects the EVAP leak test, but book it in soon to turn off the warning light and pass an emissions test. If you smell fuel, have it checked promptly.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.