 Computer/cel, Computer/CEL |
|
 |
||||||||||||||||||
 |
|
|||||||||||||||||
 |
 |
|
||||||||||||||||
 |
||||||||||||||||||
  |
|
| Do you like Volvo-Forums.com? Link to us and help spread the word about our forum. Thanks! | |
| Computer/cel, Computer/CEL |
 Sep 25 2008, 09:09 PM
Post
#1
|
|
|
Newbie Group: Members Posts: 1 Joined: 28-September 07 Member No.: 33,069 Status:  Location: USA Drives: 1996 Volvo 850 GLT  |
When I check my DTC codes with my reader I get P0410 Secondary Air Injection System. While the Check Engine Light (CEL) is on the Fuel System is running in open loop and things look fine, but when I erase the DTC, turning the CEL off the fuel system then goes into closed loop and I get a "fault with at least one oxygen sensor". There are two oxygen sensors (pre and post cat) and I just replaced both of them with $100 "Walker" Oxygen Sensors. I have also tested and found to be working my Air Pump, Relay, and SAS Valve(Air Pump Check Valve). I don't think that a ground signal is ever sent to the air pump to turn it on during normal operation, but I can ground the relay and turn the pump on by applying a ground wire myself. I can't figure it out and it's very frustrating, any help would be greatly appreciated. Thank you very much.
|
 |
 
|
|
Sep 30 2008, 02:31 AM
Post
#2
|
|
|
Expert  Group: Members Posts: 533 Joined: 17-June 06 Member No.: 15,939 Status: Location: Victoria, Australia Drives: '88 240 Wagon, '95 850 T5 Wagon, '00 Nissan ST Twin cab ute. |
QUOTE(thedawgfather @ Sep 26 2008, 01:09 PM) When I check my DTC codes with my reader I get P0410 Secondary Air Injection System. While the Check Engine Light (CEL) is on the Fuel System is running in open loop and things look fine, but when I erase the DTC, turning the CEL off the fuel system then goes into closed loop and I get a "fault with at least one oxygen sensor". There are two oxygen sensors (pre and post cat) and I just replaced both of them with $100 "Walker" Oxygen Sensors. I have also tested and found to be working my Air Pump, Relay, and SAS Valve(Air Pump Check Valve). I don't think that a ground signal is ever sent to the air pump to turn it on during normal operation, but I can ground the relay and turn the pump on by applying a ground wire myself. I can't figure it out and it's very frustrating, any help would be greatly appreciated. Thank you very much. [right][snapback]92583[/snapback][/right] You appear to have a fair knowledge of computer controlled engine management systems so I won't avance any of my theories except to say - I've heard replacing the oxygen sensors in the cat. with non-standard sensors can end up being a real PITA. |
|
|
|
|
Oct 5 2008, 11:23 PM
Post
#3
|
|
 Veteran  Group: Admin Posts: 7,248 Joined: 1-March 05 Member No.: 3,464 Status: Location: Kuala Lumpur, MALAYSIA Drives: 1996 Volvo 855 T5 FWD, 1989 Honda Civic 2-Door |
Dawgfather,
What was the original complain with the old O2 sensor? You may want to know that the old O2 sensor CAN be cleaned (i've cleaned mine a coupled of time already) using petrol. Just soak them in a petrol-safe contained and stir the container a bit. Leave so that the petrol could work its way to the sensor heads and inner parts to loosen the carbon buildups. |
|
|
|
|
Oct 6 2008, 03:36 PM
Post
#4
|
|
 Veteran  Group: Super Mod Posts: 3,344 Joined: 9-August 07 Member No.: 31,123 Status: Location: Brooklyn, New York Drives: 1996 Volvo 850 R,1968 SS clone Camaro,1963 pan/shovel chopper, 1949 Panhead bobber, 1967 Triumph Bonneville, 1967 Honda 175, 1999 Suzuki Hayabusa, 1996 Impala SS big-block, 2004 Mercedes E500 (the mrs.), 1934 Dodge, |
+1 on both posts. as to generic O2 sensors, i would steer clear of them. had trouble with some generics years ago on a different car (pontiac) and those weren't as sophisticated as the volvo, and it caused me weeks of hair pulling, and i had a loooot of hair them :grin:
|
|
|
|
|
Link To Us| If you found our site useful please link to us <a href="http://www.volvo-forums.com">Volvo-Forums.com</a>. |
Time is now: 21st November 2008 - 07:47 AM |
||
| © 2004 Volvo-forums.com | ||
