Want to remove/disable your rear O2 sensor without a CEL? Here's how..
Evolved Member
Joined: Feb 2006
Posts: 1,345
Likes: 1
From: MA
I'm using the 50Ohm 10W, and its been working for several weeks.
even @ 15V it would still only suck down 4.5W so im happy enough with the 10W rating.
*bump* for full ecu fix. not too fond of running around with a non weather proofed resistor on my under carriage
TIA mrfred!!!!
any ideas? has this happened to anyone?even @ 15V it would still only suck down 4.5W so im happy enough with the 10W rating.
*bump* for full ecu fix. not too fond of running around with a non weather proofed resistor on my under carriage
TIA mrfred!!!!
Last edited by EvoBroMA; Apr 28, 2008 at 08:40 AM.
EvoM Guru
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Joined: Mar 2006
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From: Tri-Cities, WA // Portland, OR
currently im using zt2 to send out narrowband voltage. ill double check on my connections and make sure everything is in place. ill also double check for exhaust leak that may cause the problem. tnx!
Evolved Member
Joined: Feb 2006
Posts: 1,345
Likes: 1
From: MA
EvoM Guru
iTrader: (50)
Joined: Mar 2006
Posts: 9,675
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From: Tri-Cities, WA // Portland, OR
I've been trying to get at this heater check routine from a few different angles. Today, I think I found the periphery bit that controls the O2 heater check. It appears to be periphery2, bit 11. Not sure what effect it will have on the OBD-II test readiness state. Here's what to do:
Change Periphery2 from EFDF to E7DF
If I am interpretting the ROM code correctly, there is no way to disable just the rear O2 heater. This will disable both the front and rear O2 heater checks, so beware of that limitation. If someone could try this and report back to me, I would appreciate it. Also, could you use ScanTech to observe the "Readiness" condition for the heater check?
Change Periphery2 from EFDF to E7DF
If I am interpretting the ROM code correctly, there is no way to disable just the rear O2 heater. This will disable both the front and rear O2 heater checks, so beware of that limitation. If someone could try this and report back to me, I would appreciate it. Also, could you use ScanTech to observe the "Readiness" condition for the heater check?
EvoM Guru
iTrader: (50)
Joined: Mar 2006
Posts: 9,675
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From: Tri-Cities, WA // Portland, OR
If you sniff around a bit there, I think you'll see that:
Periphery00 -> FFFF6BB2
Periphery0 -> FFFF6BB4
Periphery1 -> FFFF6BB6
Periphery2 -> FFFF6BB8
Periphery3 -> FFFF6BBA
Periphery4 -> FFFF6BBC
Overall, its kinda of a nifty find. Should make it relatively straightforward to determine what each bit in the periphery settings does now.
EvoM Guru
iTrader: (50)
Joined: Mar 2006
Posts: 9,675
Likes: 132
From: Tri-Cities, WA // Portland, OR
I've been trying to get at this heater check routine from a few different angles. Today, I think I found the periphery bit that controls the O2 heater check. It appears to be periphery2, bit 11. Not sure what effect it will have on the OBD-II test readiness state. Here's what to do:
Change Periphery2 from EFDF to E7DF
If I am interpretting the ROM code correctly, there is no way to disable just the rear O2 heater. This will disable both the front and rear O2 heater checks, so beware of that limitation. If someone could try this and report back to me, I would appreciate it. Also, could you use ScanTech to observe the "Readiness" condition for the heater check?
Change Periphery2 from EFDF to E7DF
If I am interpretting the ROM code correctly, there is no way to disable just the rear O2 heater. This will disable both the front and rear O2 heater checks, so beware of that limitation. If someone could try this and report back to me, I would appreciate it. Also, could you use ScanTech to observe the "Readiness" condition for the heater check?