SPONSORED LINKS

OBD2 Codes. CAT, O2 Sensor, or Something Else?

Tiny
FBOENING
  • MEMBER
  • 2000 SUBARU LEGACY
  • 180,000 MILES
I have a 2000 Subaru Legacy L Sedan. It died while driving home. The lights, radio, and power all work, so I don't think it's the battery or alternator. I checked the belts, and the car has gas and oil. I borrowed an OBD2 scanner from AutoZone and it pulled these codes: P0328, P0340, P0420, P0031, P0336 (PENDING), P0341 (PENDING), and P0340 (PENDING). I think P0328 can be disregarded because this code has been on for years (just haven't replaced the Engine Knock Sensor). How do I know if it's possibly the CAT or O2 sensors, or something else fuel or ignition related? Any suggestions would be appreciated. Thank you!
SPONSORED LINKS
Friday, March 23rd, 2012 AT 2:16 AM

5 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The question here is what is it doing now-Died while on the move-start by checking the fuel pressure if its within specs and report back the pressure readings
Was this
answer
helpful?
Yes
No
Friday, March 23rd, 2012 AT 4:22 AM
Tiny
FBOENING
  • MEMBER
  • 3 POSTS
How do I check the fuel pressure? Will I be able to get an accurate reading if the car won't start? Where do you hook up a gauge, and can I check the pressure by priming the fuel system by cycling the key?
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Friday, March 23rd, 2012 AT 4:38 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Use a fuel pressure tester-Hook it up on the fuel rail test port and turn key to run then read the pressure and then comeback with the readings for interpretation- I recommend you get repair manual
Was this
answer
helpful?
Yes
No
Friday, March 23rd, 2012 AT 7:24 AM
Tiny
FBOENING
  • MEMBER
  • 3 POSTS
I had my neighbor look at the car. The timing belt is not turning while trying to start the car. He said his friend had the same problem, the timing belt had slipped, and the pistons bent the exhaust valves. If this happened to me, what are the chances I could replace the timing belt and tensioners and the exhaust valves would still be intact? Do you know ballpark what it costs to do the timing belt/tensioners? Or replace the exhaust valves?
Was this
answer
helpful?
Yes
No
Monday, March 26th, 2012 AT 5:56 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The cost of repairs varies with location
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Monday, March 26th, 2012 AT 6:16 PM

Please login or register to post a reply.

Related Oxygen Sensor Replace/Remove Content

Oxygen Sensor Replacement
VIDEO
Oxygen Sensor Replacement
Instructional repair video
Oxygen Sensor Replacement
GUIDE
Oxygen Sensor Replacement
An oxygen or lambda sensor is used to determine the engine exhaust mixture which can then be controlled by the computer. These sensors are equipped with a heater that can...
VIEW MORE

Sponsored links