This bulletin applies to 2010-2017 Chevy Equinox and 2012-2016 Captiva vehicles, equipped with a 2.4L engine. The SES light may be on and a rough running condition may be noted.
DTC P0172 may be set. In most cases, the crankcase will have obvious fuel contamination. This may be the result of the high pressure fuel pump leaking fuel into the crankcase when the plunger is depressed.
If diagnosis does not isolate the cause of the concern, check the low side fuel pressure leakdown with a mechanical gauge. If fuel pressure leakdown is present with the J37287 fuel one shut-off adapter installed and closed, replace the high pressure fuel pump.
Also, be sure to change the engine oil and filter.
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety ofspecialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.
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