https://wiki.ross-tech.com/wiki/index.php?action=history&feed=atom&title=P026A%2F000618 2026-04-23T20:40:34Z Revision history for this page on the wiki MediaWiki 1.43.3 https://wiki.ross-tech.com/wiki/index.php?title=P026A/000618&diff=9662&oldid=prev 2025-03-13T16:24:28Z

<p>Created page with &quot;== P026A/000618 - Charge Air Cooler: Efficiency Below Threshold - MIL ON == ==== Possible Symptoms ==== * Malfunction Indicator Lamp (MIL) active * Reduced engine output =...&quot;</p> <p><b>New page</b></p><div>== P026A/000618 - Charge Air Cooler: Efficiency Below Threshold - MIL ON ==<br /> <br /> ==== Possible Symptoms ====<br /> <br /> * Malfunction Indicator Lamp (MIL) active<br /> * Reduced engine output<br /> <br /> ==== Possible Causes ====<br /> <br /> * Intercooler restricted (internal or external)<br /> * Faulty sensor<br /> * ECM firmware issue<br /> <br /> ==== Special Notes ====<br /> <br /> * On some TDI CR engines, a faulty G42 / G31 sensor at the top of the intercooler may report a much higher than possible temperature:<br /> ** IDE04938 - Sensor for temp after charge air cooler: raw value<br /> ** [https://forums.ross-tech.com/index.php?threads/32948/ Case Study - P026A/000618 - Charge Air Cooler: Efficiency Below Threshold - MIL ON]<br /> <br /> * When found in a Touareg with the 3.0L TDI CNRB engine, there may be a firmware update for this:<br /> ** https://static.nhtsa.gov/odi/tsbs/2013/SB-10067148-5290.pdf<br /> <br /> [[Category:Fault Codes]]</div>

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