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Showing results for tags 'Knock Sensor circuit P 0325'.
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Greetings! I think I've figured out where to post this on the forum. I am a brand new Subaru owner. 1997 Legacy Outback Wagon with standard engine. I love it. 232K miles, and two codes for the SEL prevent me from passing inspection in NJ P 0325 Knock Sensor Circuit P 0420 Cat Efficiency Bank 1 The knock sensor is seems fairly straight forward. I will replace it and hope the code goes away. At first, I thought I would have to replace the whole catalytic converter...but I got advice here NOT to do that. The mechanic I hope to trust here said that the P 0420 (which he knew off the top of his head) would NOT BE CLEARED by replacing the O2 sensors as a few experts here previously suggested. He says a flush of the cat system would clear the code temporarily, but that the CAT EFFICIENCY reading implies that the two sensors are working, and the cat is clogged. His price is around $170 for chemicals and labor and he thinks that the code will clear in order to pass inspection. Advice is welcome. I like the idea of the price for the one year of inspection, I'll prove that the O2 sensors work and save up for a new Cat system later. However, with the knock sensor code, it does seem interrelated according to postings here. I don't know which road to travel? Nearly broke, but must get the car passed the NJ state inspection system which is entirely code-based. Sincerely! Erik