Nissan Altima 2003 (2.5 ) have the ENGINE light on.
Asked by altima135 Apr 17, 2022 at 05:54 PM about the 2003 Nissan Altima 2.5 S
Question type: Maintenance & Repair
Nissan Altima 2003 engine light on, sometime go off and the reading with
the computer said:
Primary Fix
Replace Evaporative Emissions (EVAP) control Valve
Parts required:
AC Delco GM Original Equipment
12690512 Vapor Canister Purge Valve
a Mechanic said to change the GAS cap and light still on
Need your advice to correct that, and where is that part, and also if is
something i can change myself.
Thanks
3 Answers
The first thing we need to know is exactly what codes do you have when you scanned the computer. Most auto parts stores will scan the computer for free. Once we have the codes we can proceed. The gas cap and oxygen sensor are always the "go to" things when the check engine light comes on. Unfortunately these usually don't fix the problem. Proper diagnosis is the key to not wasting time and money trying to fix your vehicle. Jim
Hello, about the service engine light on in the nissan altima 2003 2.5s the code show is : P0442 (evap) SYSTEM LEAK DETECTED ( Small leak .04 inch) another code: Secondary DTCs P0458 Evaporative Emission System Leak Detected ( very small leak)
Ok, you're going to need a smoke test to find this leak. The shop will force harmless smoke into the EVAP system through the gas tank. Then put the vehicle up on their lift and inspect the EVAP system hoses and other components to see where the smoke comes out. Where there's smoke, there's a leak. Because the computer has the ability to detect a leak too small for the naked eye to see, the smoke test is the only way to find it. Hope that helps! Jim
