A guy i work with had that code & replaced the computer-i gave him a hand & what we found was a tiny hole chaffed into the bottom of the vacuum hose between the egr control solenoid/regulator and the egr valve. simply disconnect hose at both ends, plug one end & suck on the other and it should hold vacuum on your tongue. also make sure hose is not plugged. if you find it not holding vacuum then look at bottom side of (usually green) hose where it can chaff on the intake manifold (2.5l) these plastic lines can be repaired by cutting & rejoin with a short piece of rubber w/washer hose. this code 332 means that there is low/no egr flow detected & nothing else under the hood other than a egr type repair is going to help so one has to zone in on the egr system with a good understanding of it-it is usually one of the easier codes to fix. other likely possibilities (as last posting mentioned) is plugged egr ports below throttle body-(using a vacuum pump or an old piece of vacuum line, suck the egr valve open at idle-if the idle doesn't drop then the ports are plugged). Finally egr pressure (dpfe) sensor reading low is a common cause as they slowly deteriorate on the inside. Please imform us of your findings.
