'03 EX-L Intermittent CEL p2195, p0171
Super Moderator : And A Texan
Joined: Feb 2007
Posts: 9,652
From: Katy, TX
Look for a wire in the harness to be gnawed (sp?) through. I had this problem w/ knock sensor on my MDX. This might explain 2195.
Note wire could be damaged anywhere between sensor and ECM. Some wires are more attractive to rodents than others due to insulation components (soy based plastics).
good luck
Note wire could be damaged anywhere between sensor and ECM. Some wires are more attractive to rodents than others due to insulation components (soy based plastics).
good luck
Super Moderator
Joined: Oct 2010
Posts: 7,098
From: United States
If it was a rodent that made a nest from the hood insulation or something else, then inspect along the engine wire harness wiring for the AF ratio sensor (attach are images of the connectors and routing for the sensor in the engine compartment). In the wire routing diagram, #8 is connector C201 and #26 is the connector for the AF sensor.
Honda sells rodent repellent tape.
Honda sells rodent repellent tape.
Super Moderator
Joined: May 2010
Posts: 11,834
From: Kenton, TN
I'm not trying to derail this thread by my comment.
O2's/AF Sensors wear out over time - most suppliers give them ~100K miles.
Give everything a good inspection for signs of "chewing" and then go back to where the others were going before I got everything "off track".
O2's/AF Sensors wear out over time - most suppliers give them ~100K miles.
Give everything a good inspection for signs of "chewing" and then go back to where the others were going before I got everything "off track".
Super Moderator
Joined: Oct 2010
Posts: 7,098
From: United States
I also agree, if there is no wire damage, it may just the be A/F sensor needing replacement as previously mentioned. My opinion is that if it is the A/F sensor, it may also take care of the other code P0171; as they are both related to a lean condition.
The service manual states in part if codes such as P2195 is indicated at the same time as P0171, to troubleshoot those codes (for example, P2195) first, then recheck for P0171.
The service manual states in part if codes such as P2195 is indicated at the same time as P0171, to troubleshoot those codes (for example, P2195) first, then recheck for P0171.
Super Moderator
Joined: May 2010
Posts: 11,834
From: Kenton, TN
I also agree, if there is no wire damage, it may just the be A/F sensor needing replacement as previously mentioned. My opinion is that if it is the A/F sensor, it may also take care of the other code P0171; as they are both related to a lean condition.
The service manual states in part if codes such as P2195 is indicated at the same time as P0171, to troubleshoot those codes (for example, P2195) first, then recheck for P0171.
The service manual states in part if codes such as P2195 is indicated at the same time as P0171, to troubleshoot those codes (for example, P2195) first, then recheck for P0171.
Thread Starter
|
Member
Joined: Feb 2013
Posts: 185
From: Northern VA
It's okay! 
Better to be safe than sorry.
I checked all of the wiring, and saw no signs of chewing. Just two other small nests. I did notice the A/F sensor was a little slimy, and smelled a bit of ATF. My ATF is a little low, but no signs of drippage or leaks. Next pay period, I'll be replacing that.
Better to be safe than sorry. I checked all of the wiring, and saw no signs of chewing. Just two other small nests. I did notice the A/F sensor was a little slimy, and smelled a bit of ATF. My ATF is a little low, but no signs of drippage or leaks. Next pay period, I'll be replacing that.
Super Moderator
Joined: Oct 2010
Posts: 7,098
From: United States
An O2 sensor wrench and a breaker bar makes it easier. Other wrenches would work, as long as you don't round off the sensor nut and able to get enough leverage on it to loosen it.
The O2 sensor wrench/socket should be 22mm.
The O2 sensor wrench/socket should be 22mm.