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P0341, P0442, P0404 Fault Diagnosis and DIY Fixes for 2000 Saturn SL2

Model: 2000 Saturn SL2 Fault Code: P0341 Posted: 2013-06-14 11:06

My 2000 Saturn SL2 recently triggered three check engine light codes: P0341 (Camshaft Position Sensor Performance), P0442 (Evaporative Emission System Small Leak Detected), and P0404 (Exhaust Gas Recirculation Valve Open Position Performance). I purchased this used car from a college friend of my girlfriend, who is moving for work. While the price was reasonable, these codes appeared shortly after purchase. I have limited experience with automotive diagnostics and am wondering if any of these issues can be resolved through DIY repairs. If not, what would be a typical cost range for professional fixes? Additionally, I'd appreciate guidance on whether these codes are related to common mechanical or electrical problems in the 2000 Saturn SL2. Any advice on how to diagnose or fix them at home would be greatly appreciated. Thank you for your time and insight. Tony

Related fault codes

P0341P0404P0442

Comments (5)

Anonymous 2013-06-14 11:10

I recently noticed a wire near the transmission oil filter that had been cut. I spliced it back together and wrapped it with electrical tape. Not sure if this was related to any of the codes, but wanted to share in case it helps others.

Anonymous 2013-06-14 12:28

DTC P0341: The 2000 Saturn SL2 does not use a traditional camshaft position (CMP) sensor. Instead, it relies on a unique system that detects cylinder firing during compression—specifically for the #4 cylinder. Issues with secondary ignition components (such as coil packs, spark plug wires, or connectors) can trigger this code. A missfire or low compression may be at play. Check freeze frame data to identify when the fault occurred. DTC P0442: This indicates a small leak in the evaporative emission system. The gas cap is often the root cause—ensure it's properly tightened and sealed. Gas caps are not inexpensive, and using low-quality or expired caps can lead to recurring issues. DTC P0404: Points to an EGR valve that may be stuck open. Inspect the EGR pipe for carbon buildup and ensure the electrical connector is secure and fully connected. A clogged or improperly seated EGR valve can cause performance issues and trigger this code. For DIYers, these are manageable with basic tools—but always verify if the vehicle was operating normally before and after repairs. Also, confirm that all components were in good condition prior to any modifications.

Anonymous 2013-06-14 12:41

Thanks for the detailed breakdown! I recently discovered another issue: my EGR valve wasn't fully seated in its gasket or seal housing—it was only lightly resting on top. After pushing it all the way back into place, the fit improved significantly. Could this have contributed to one or more of these codes? For example, could a misaligned EGR valve cause P0404 or affect overall engine performance?

Anonymous 2013-06-14 15:19

I'm wondering if this model uses a DOHC (Dual Overhead Cam) configuration. Could the PCV valve—located near the oil fill cap on top of the engine—also be involved in these issues? The EGR valve is bolted directly to the engine block, so it's worth checking its position and function.

Anonymous 2013-06-14 16:53

Thanks for the clarification! I confirmed with my friend that it was indeed the EGR valve. After some research, I found that the PCV valve is located right next to the oil cap on top of the engine. Was this a potential contributing factor? It seems like both the EGR and PCV systems could play roles in emissions-related codes.