1999 Buick Century Q&A
1999 Buick Century Question: EGR valve or what? Can I drive for a couple of weeks with no damage to car?
Just bought this car 3 weeks ago. Last week service engine soon light illuminated and stayed on. Advance Auto tested and code was P0550. Gas cap is good, so they suggested Fuel Injector Cleaner and reset light. 2 days later when I went to start the car, it hesitated just for a second before starting and light was on againand has been on now for 3 days. Should I try the cleaner again or replace the EGR valve? They told me that it could be that. I don't have money to do a full engine scan right now (about $90+) and will be starting a much needed job in about a week. Would it hurt to drive it for 2 weeks until I get a paycheck? Also would it hurt if I start using higher octane fuel? I now use 87. - evepuma
I could be wrong but I thought this code was for power steering pressure sensor. If it is, you could probably drive for a couple of weeks, but check your power steering fluid level. - csubak30
C Subak30 is right it is a power steering pressure sensor code (P0550), it sends a signal to the computer to raise the idle speed when the steering pump puts pressure on the engine, does the engine stall on tight steering turns if not drive it for a while, but do get it fixed! - patrick mannion