20 Most Recent 2004 Lexus GS 300 Questions & Answers

I do think you have a leaking engine cylinder gasket or a cracked cylinder head.

If the security light is flashing, then the alarm has disabled the engine. Try locking with key remote and unlocking again with key(not remote) and see if that works. OR put key in turn to ACC and leave for about 5-6mins, switch off and back on to start engine, think thatshould do it. Let me know if it worked, which one.

If the immobilizer is worth anything, it will not work at all.

The purge valve is mounted in the engine compartment, probably on the firewall. It is held on by two bolts. It has an electrical connector and two vacuum hoses and looks like the pic below. . Release the connector and unscrew the two bolts. Move the vacuum lines from the old valve to the new one. Bolt the new valve down and connect the wiring harness.

Check behind the ash tray.

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fit a new battery and get a scanner tool to reset the ECM/immobilizer mobile mechanics should have a scanner for the job

remove under panel or remove grill if possible

IS THE BATTERY INDICATOR GOES IN YOUR DASHBOARD,IF THERE IS,YOUR ALTERNATOR IS NOT CHARGING THE BATTERY THATS WHY YOUR CAR IS SHOUTOFF.CHECK YOUR ALTERNATOR FIRST,

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please make an obd check system

Trust what the AA says .. It does sound like you have an airlock .. and the airlock is likely to be in the heater matrix, as opposed to the radiator. Bleed the heating system: Set your heater controls to hot and fully open. Let the engine work until it reaches normal operating temperature. Check your coolant level to see if it has dropped. You can always bleed the coolant system by leaving the coolant bottle cap off for 10 minutes whilst the engine ticks over. It isn't your water pump.