Question Asked: service engine soon light
February 27, 2011, 10:41 AM
to clear the diagnostic codes ,can I remove the powertrain control module bat fuse to turn light off. The codes are reading 171 and 174,also eng coolant light coming on ,but not low and no coolant loss.
Question Asked: onstar engine problem
February 07, 2011, 02:33 PM
the check light stays on. Had diagnostic test at GM garage, it coded PO 171 and PO 172; meaning leaking head gaskets and leaking intake manifold. Car never has overheated and have added very little antifreeze. Two other tests run and they both coded PO 171 and PO 174.Noticeable surge with small miss at idle speed.Have 94,000 miles,would like to keep. Any help would be appreciated.
Question Asked: EGR removal diagrahm
November 16, 2010, 10:49 AM
where can I find diagrahm for removing and cleaning an EGR valve on my 2001 cad. dts? Will this help the o2 sensor to function properly?
Question Asked: service engine light
November 14, 2010, 10:37 AM
had diagnostic test run from GM garage;results were code 170/171,intake leaks and head gasket.A second opinion gave different results-oxygen sensors.Service engine light stays on,what to do? Engine has never overheated,and no anti freeze loss. Does have small pulsing noticeable on rpm hand;also poor gas mileage.
Question Asked: intake,head gasket problem
November 04, 2010, 04:36 PM
had diagnostic test runwith these code results: PO171,PO172 intake leak,intake leak;head gaskets blown.My question-can problem be resolved without major expense. Service manager recommended exchange motor or trade it.I love my car,give me a better senario! Car is getting terrible gas mileage(15.4)engine pulsing somewhat;has not overheated.Give this ol boy some good news(70& retired)
Problem Reported: Rough Idle Due to EGR Valve Sticking Open
September 15, 2010, 10:07 PM
<p>The <a id="ce_8609" class="ct_glossary tooltip" href="/exhaust-gas-recirculation-valve">EGR valve</a> may stick open, causing a rough idle and/or the <a id="ce_5700" class="ct_how_to tooltip" href="/understanding-the-check-engine-light">Check Engine Light</a> to illuminate.</p>