Faulty leak detection pump solenoid or pump assembly (internal open or short); Damaged, chafed or corroded wiring to the pump solenoid (open circuit or short to earth or voltage); Corroded, loose or water-damaged connector at the pump or control module; Blown fuse or a fault in the power supply feeding the solenoid circuit; Damaged or kinked vent hose or pipework around the pump causing the pump to be disturbed or the harness to be strained; Fault inside the engine control module driver circuit.

P1495

Leak Detection Pump Solenoid Circuit Open Or Shorted.

Pontiac
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 Pontiac means the engine control module has detected an open or short circuit in the leak detection pump (LDP) solenoid circuit, part of the evaporative emission system. The module monitors the solenoid's control circuit and sets the code when the electrical readings do not match what it expects. The code relates to the circuit, not necessarily to a physical vapour leak. Which models use this pump varies, so check the applicable wiring diagram.

Symptoms

Check engine light on
Evaporative system monitor will not complete, so an emissions test may fail
Possible fuel smell if the EVAP system is not sealing properly
Usually no change in driveability
Other EVAP codes stored alongside it

Possible causes

Faulty leak detection pump solenoid or pump assembly (internal open or short)likely
Damaged, chafed or corroded wiring to the pump solenoid (open circuit or short to earth or voltage)likely
Corroded, loose or water-damaged connector at the pump or control modulelikely
Blown fuse or a fault in the power supply feeding the solenoid circuitpossible
Damaged or kinked vent hose or pipework around the pump causing the pump to be disturbed or the harness to be strainedrare
Fault inside the engine control module driver circuitrare

How to diagnose

Read the stored codes and freeze frame data, note any other EVAP codes, then record and clear them to see if P1495 returns.
Visually inspect the leak detection pump, its connector and the harness for damage, rubbing, corrosion, water ingress or previous repairs.
Check the relevant fuse and confirm the solenoid circuit has a correct power supply, following the wiring diagram for the model and engine.
Disconnect the pump connector and measure the solenoid resistance, comparing with the manufacturer's specification for that model.
Check the control wire for continuity, and for shorts to earth or voltage, between the pump connector and the control module.
Using a scan tool with bi-directional control, command the pump solenoid and listen or check for operation and any circuit status change.
Check the module connector pins for tension, corrosion or bent terminals before suspecting the control module.

How to fix

Replace the leak detection pump or solenoid if its resistance is out of specification or it does not operate.
Repair or replace damaged wiring and ensure it is properly routed and secured.
Clean or replace corroded or damaged connectors and terminals.
Replace the blown fuse after finding and correcting the cause of the overload.
Repair or replace the engine control module only if the circuit and components are proven good and the driver fault is confirmed.

Can I keep driving?

Low severity

The car is normally fine to drive as this is an emissions-related circuit fault. Book it in for repair soon, particularly if an emissions test is due or you notice a fuel smell.

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