1997 Nissan Maxima with P1445 and P0130 Codes: How to Fix for NJ Inspection Pass?
I own a 1997 Nissan Maxima with 235,000 miles. It has an automatic transmission—there were two versions available that year, but I'm unsure which one my car has. The vehicle has performed well overall, but it's now failing New Jersey inspection due to the following OBD-II diagnostic codes: P1445, P0130, and P0325. I believe the knock sensor issue (P0325) will not trigger the check engine light or cause a failure in NJ inspections. However, I'm concerned about potential engine damage if left unaddressed. According to technical databases: - P144-5: Purge Volume Control Valve Circuit malfunction - P0130: Upstream O2 Sensor (Bank 1) circuit malfunction (Bank 1 is the side of the engine facing the firewall) I'm looking for advice on which components to replace or repair to pass inspection. Any insights on the most likely causes and cost estimates? Thanks in advance, Tony
The P1445 code indicates a fault in the Purge Volume Control Valve circuit. The most common cause is a failed purge valve, located at the top of the intake plenum. Nissan offers an updated purge valve with a new bracket and hoses. If the bracket and hoses have already been replaced, only the valve itself needs to be swapped. Replacement valves typically cost between $150 and $200. While this is the most frequent failure, other issues could also cause the code. A full system test is recommended to confirm the exact root cause. You'll need to decide whether to repair or replace components based on your budget and inspection requirements. Regarding P0130: This points to a malfunction in the upstream O2 sensor for Bank 1 (the side of the engine facing the firewall). The O2 sensor itself is the most likely culprit. A circuit test should be performed to verify the issue, especially at 235,000 miles when wear and aging are common. Good luck with your repair and inspection pass!