'94 Gs300

[dlash]

Need help........check engine light, trac off light & trac light keep coming on. Have taken to local Lexus dealer, spent $83.00 on diagnostic check and advised of code 71 which they state is EGR related. Also advised these items needed replaced (EGR valve, EGR modulator valve, EGR VSV and decarbon the connector tube from EGR valve to manifold).

Everything has been addressed and lights continue to come on. I have reset system and started and idled car to normal operating temperature and allowed to run for as long as 20 minutes with no lights appearing. However, when I drive the car, particularly at 50 miles per hour or above, lights will then come on and stay on until I reset system again.

Could it be something other than emissions, i.e. traction control system ?

[TurboGS300]

doublecheck all the items below!! <_<

Open in EGR gas temp circuit

short in VSV circuit for EGR

EGR hose disconnected, valve stuck

clogged EGR gas passage

ECM

[dlash]

doublecheck all the items below!! <_<

Open in EGR gas temp circuit

short in VSV circuit for EGR

EGR hose disconnected, valve stuck

clogged EGR gas passage

ECM

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rechecking items visually and manually disconnecting/reconnecting harnesses.however,having difficulty getting info on how and location points for testing circuits.proceeding slowly.thanks for your info.

[dlash]

thanks to turbogs300 code 71 problem solved by cleaning out the egr passages in the intake manifold.....carbon build up completely shut off tube.

[TurboGS300]

Sweet man, good job <_< Make sure you keep up on that stuff, so it doesn't get clogged again