Auto Repair Manual Free Download and ReviewsFree download ebook pdf files automotive manual

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Tests/Procedures: Potential Causes: Tech Tips: Diagnostic Codes: 1. Replace the thermostat and test drive to see if the code returns. Thermostat This code indicates the engine has not reached a set temperature based on engine run time. P0128 Reported Fix Details 2003 Chevrolet Trailblazer, 4.2L * Replaced Engine Thermostat – We replaced thermostat (with housing) and refilled system with fresh coolant. Cleared code and test drove. now vehicle comes up to operating temp as it should. 2003 Chevrolet Trailblazer, 4.2L * Thermostat – Replaced the t-stat and alol is fine. Did notice that ect at cruise warm is around 210F . Seems high , will watch on other vehicles. 2005 Chevrolet Trailblazer, LS 4.2L * Replaced Engine Thermostat – replaced thermostat NOTE: it is on the side of the engine at the lower radiator hose 2005 Buick Rainier, 4.2L, Vin S, Eng Cfg L6, USA/Canada * Thermostat – DTC P0128, Engine not reaching operating temperature, Replaced thermostat, retest OK Confirmed Fix Engine Thermostat Engine Thermostat Engine Thermostat Engine Thermostat

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Tests/Procedures: 1. Ground the Violet/Yellow wire (disarm circuit) that goes to either front door and the theft alarm module. Have the keys out of the ignition and all doors closed when grounding the wire. This should disarm the theft alarm system and prevent the
theft alarm from arming. 2. Check that the interior lights do not stay on due to the wire being grounded. If they do, the illuminated entry relay will need to be removed or another method of disabling the theft alarm will have to be used. 3. Another method if the theft alarm module is faulty would be to disconnect the module and replace the Powertrain Control Module (PCM) with a new one. Potential Causes: Disarm Circuit — Ground disarm circuit. Powertrain Control Module (PCM) Disconnected Theft Alarm Module

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Audi S6 Avant 2002-2004, Audi RS6 2003-2004 – 4.2 Liter V8 5V Engine Mechanical,
Secondary air system The secondary air system is designed to enable catalytic converter to heat up and reach its operating temperature more quickly after a cold start. Principle of operation
Due to extra mixture enrichment during cold-start phase, an increased amount of unburnt hydrocarbons is carried in exhaust gas. The secondary air system improves the afterburning(oxidation) process in the catalytic converter, and in this way reduces toxic emissions. Heat generated by oxidation accelerates “light off” of catalytic converter and significantly improves
exhaust gas quality during warm-up