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Chris Altmeyer

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Everything posted by Chris Altmeyer

  1. My 2004 C2 Cab has me stumped with regards to how a slow warm up due to Tiptronic coolant valve failure will affect the emissions system and O2 sensor readings. I have a CEL P0131 and I have a new O2 sensor (sensor 1, bank 1). I have read that extended warm up can cause the O2 sensor to throw a code. I have determined that the trans cooler control valve has a blown diaphragm so that will affect the secondary air system and create a vacuum leak while the change over valve is open. My durametric also confirms that my readiness of the secondary air system has failed - all other emission systems say ready. My question is will the trans cooler being in the default open position substantially affect engine warm up and therefore also contribute to the O2 sensor reading improperly and taking too long for signal to reach the ECU? Does the secondary air injection system have anything to do with introducing additional air into the intake system? Thanks
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