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1998 Toyota Camry P0402 Code: EGR Valve Replacement Not Resolving Issue

Model: Toyota Camry Fault Code: P0402 Posted: 2006-10-07 15:17

Hi, I'm having trouble with my 1998 Toyota Camry that has been throwing up a P0402 diagnostic code. I've already cleaned the EGR valve and associated hoses and intake manifold—there's only a thin circular black ring of carbon near the opening, which is minimal. After clearing the code, it returns after just 4 to 5 engine starts. I recently replaced the EGR valve with a new one from AutoZone, as the MAP sensor tested fine and I cleaned the vacuum modulator filter using compressed air. However, even with this replacement, the P0402 code reappears consistently. All hoses appear properly connected, and I haven-'t tested the EGR Vacuum Solenoid Valve (EGR VSV) yet—this component was not evaluated in my previous checks. Given that the issue persists despite replacing the main EGR valve, I'm wondering what else could be causing this. Could there be a problem with the EGR VSV operation? Does it require specific lubrication or cleaning to function properly under certain engine conditions? Any real-world experiences or troubleshooting tips for P0402 on 1998 Toyota Camry models would be greatly appreciated. Thanks in advance! Tommy

Related fault codes
P0402
Comments (3)
Anonymous 2006-10-07 17:20

I noticed a confusion in my earlier post—this vehicle is actually showing P0401, not P0402. This distinction matters significantly as the codes indicate different issues. Thanks for pointing that out. Tommy

Anonymous 2006-10-08 11:28

When testing the EGR valve, make sure to apply vacuum and confirm that the engine stalls—this is a key indicator of proper EGR function. If the engine doesn't stall under vacuum, it may suggest a faulty or improperly functioning EGR valve or solenoid. Also ensure the EGR VSV is fully operational when vacuum is applied.

Anonymous 2006-10-11 23:00

I experienced intermittent P0401 issues two months ago. After replacing the EGR VSV on September 22, the code hasn't returned since. The old valve tested fine during my diagnostics—so I suspect it wasn’t failing outright but rather malfunctioning under specific engine conditions. If you're not ready to spend around $70 for a new solenoid, try removing and cleaning the EGR VSV manually. There may be lubricants or cleaners available specifically designed for solenoid valves. After cleaning, I believe it could restore proper operation during critical driving scenarios. Reference: http://www.obd-codes.com/forums/viewtopic.php?t=742 Kody