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P0442 Diagnostic and Fix for 2002 Chevrolet Express 1500: Starting Issues and EVAP Leak Solutions

Model: 2002 chevrolet express 1500 Fault Code: P0442 Posted: 2015-09-11 12:28

I've been experiencing difficulty starting my 2002 Chevrolet Express 1500 for several months. The vehicle typically only starts when I wiggle the shifter, which allows it to crank. Recently, the check engine light activated, and a diagnostic test revealed code P044-than indicates a small leak in the evaporative emission (EVAP) system. While this is often referred to as a 'gas cap code,' I've already checked and resecured the gas cap—ensuring it's tightened to 1-2 clicks with clean, undamaged seals. The issue persists despite these steps. Additionally, my vehicle fails to crank properly when in gear or when attempting to start from neutral; there is no audible sound of the starter, though I confirm that power is present at the ignition switch. As a mother of six, this vehicle is essential for daily use, and I'm seeking affordable, reliable solutions without costly repairs. Could this be related to an electrical issue such as a faulty ignition switch or neutral safety switch? Any guidance on how to test these components using a digital multimeter (DVOM) or test light would be greatly appreciated.

Related fault codes

P0442

Comments (3)

Anonymous 2015-09-11 12:59

This appears to involve multiple potential issues. First, confirm whether the shifter is being wiggled to achieve engine cranking—yes? Do you have a remote starter? Please respond with 'NO'. Try shifting into neutral and holding it for a few seconds; this often helps resolve starting problems. Two key electrical components to consider: 1. The ignition switch (not the key lock)—this controls power flow to the engine. 2. The neutral safety switch—prevents starting when in gear. Both require testing with a digital multimeter or test light for proper diagnosis. The P0442 code specifically points to a small leak in the EVAP system, commonly caused by an improper gas cap. Use only an original equipment manufacturer (OEM) gas cap and ensure it's securely tightened to 1-2 clicks. Inspect the seal for nicks or tears. For reference on ignition switch replacement: https://www.youtube.com/watch?v=XSApoE5tUtQ

Anonymous 2015-09-11 13:11

No, I do not have a remote starter. The shifter wiggling is necessary—though it's not gentle; it takes up to five minutes to get the engine to crank. When I shift into neutral and back out, the vehicle does not crank at all. There’s no sound from the starter, but I can confirm that power is reaching the ignition system. I’ve never experienced this before—this seems like a new issue. Where exactly is the ignition switch located? I've had recurring problems with my 2002 Chevrolet Express 1500. The gas cap was checked and reinstalled, but the check engine light remains on after four days. Any insight into what might be causing this?

Anonymous 2015-09-11 13:53

The issue is likely electrical in nature and requires hands-on testing. The ignition switch is a known failure point for vehicles of this model year—definitely worth investigating. I recommend reviewing the video I linked, which demonstrates how to replace the ignition switch. A third possibility exists: a faulty starter relay. This component is typically located in the underhood fuse box and should be checked against the wiring diagram. While these issues may seem complex, they are all within reach of basic troubleshooting with proper tools.