Question about 1995 Saab 900

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Intermittent ignition cutting out. Won't do it when a mechanic is there! Not relay or fuel pump, guessing ignition switch. Happens at 5 mph or 90! Starts again no problem, ignition lights go dim when it happens.

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If the car is AT, check the neutral safety/AT range switch. If this is not the problem, or if the car is manual trans, check your battery via an actual load test and inspect the main positive battery cable while you are at it. Low voltage can cause this exact problem. As well, the 1995 model year in particular had some issues with cable rot due to excessive battery outgassing. If the battery and cable are good to go, check the crank angle sensor first and then the DIC, although these usually fail without causing light dimming.

Posted on Apr 27, 2009

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DTC P1495 - Leak Detection Pump Solenoid Circuit

WHEN MONITORED: Immediately after a cold start, with battery/ambient temperature between 4.4 °C (40 °F) . F and 32 °C (90 °F) . Coolant temperature within -12 °C (10 °F) of battery/ambient

SET CONDITION: The state of the solenoid circuit does not match the PCM's desired state.

POSSIBLE CAUSES:
* Wiring Harness Intermittent
* Leak Detection Pump
* Fused Ignition Switch Output
* LDP Solenoid Control Circuit Shorted To Ground
* LDP Solenoid Control Circuit Open
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Leak Detection Pump System
The evaporative emission system is designed to prevent the escape of fuel vapors from the fuel system. Leaks in the system, even small ones, can allow fuel vapors to escape into the atmosphere. Government regulations require on-board testing to make sure that the evaporative (EVAP) system is functioning properly. The leak detection system tests for EVAP system leaks and blockage. It also performs self-diagnostics. During 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.

SYMPTOM: P1490-LOW SPEED FAN CONTROL RELAY CIRCUIT
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Notes
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Hope helps (remember comment and rated this).

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