1995 3.9 cel
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Recovery Vehicle
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1995 3.9 cel
Keep getting a CEL with code 45, (3.9 V8)
Only started getting it after I tinkered with the base idle screw (I realize now this was unwise). Reset it with battery disconnect but it comes back every other day or so.
Could this be entirely unrelated? I have it set to idle around 600-700rpm at the moment and it runs fine. Before it ran and drove with no codes but damn when I would shift into neutral at a stop it would drop so low I worried it would cut out. Should I be trying to get it to idle back lower and the code will stay away? I have a shop I trust but they're so darn busy around the holidays.
Can't get new tags until I pass Smog here in CA... so this gets annoying when the CEL is an auto fail.
Only started getting it after I tinkered with the base idle screw (I realize now this was unwise). Reset it with battery disconnect but it comes back every other day or so.
Could this be entirely unrelated? I have it set to idle around 600-700rpm at the moment and it runs fine. Before it ran and drove with no codes but damn when I would shift into neutral at a stop it would drop so low I worried it would cut out. Should I be trying to get it to idle back lower and the code will stay away? I have a shop I trust but they're so darn busy around the holidays.
Can't get new tags until I pass Smog here in CA... so this gets annoying when the CEL is an auto fail.
Last edited by DavC; Dec 21, 2016 at 02:29 PM.
TReK
Joined: Mar 2010
Posts: 2,779
Likes: 627
From: NYC
I did a bit of digging and came up with a few other possibilities.... might be related to your ignition amplifier or a bad relay.
Code 44 and 45. Looks like I got a Heated O2 problem. | Land Rover and Range Rover Forums
And a primer on setting your base idle to review...
http://c7743.r43.cf2.rackcdn.com/Dow...le-air-gap.pdf
found this....
Hopefully this gets you going in the right direction.
Code 44 and 45. Looks like I got a Heated O2 problem. | Land Rover and Range Rover Forums
And a primer on setting your base idle to review...
http://c7743.r43.cf2.rackcdn.com/Dow...le-air-gap.pdf
found this....
Code 44 - Lambda sensor A - left bank
Code 45 - Lambda sensor B - right bank
If one of these fault codes (#44 or #45) is displayed check the wiring to that particular lambda sensor. In addition this fault will be displayed if the vehicle has a condition which causes it to run very lean or very rich on one side (example - a vacuum leak or a bad injector). This code often appears in conjunction with the misfire codes in cases of bad ignition misfire (cross-firing plug wires)
If both codes are displayed, the voltage supply to the heater coils of the sensors must be checked. Check for 12V appearing on the O2 signal lead, and check the heater circuit for shorts.
Land Rover Troubleshooting: retrieving fault codes
Code 45 - Lambda sensor B - right bank
If one of these fault codes (#44 or #45) is displayed check the wiring to that particular lambda sensor. In addition this fault will be displayed if the vehicle has a condition which causes it to run very lean or very rich on one side (example - a vacuum leak or a bad injector). This code often appears in conjunction with the misfire codes in cases of bad ignition misfire (cross-firing plug wires)
If both codes are displayed, the voltage supply to the heater coils of the sensors must be checked. Check for 12V appearing on the O2 signal lead, and check the heater circuit for shorts.
Land Rover Troubleshooting: retrieving fault codes
Hopefully this gets you going in the right direction.
Last edited by WaltNYC; Dec 22, 2016 at 09:29 AM.
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Recovery Vehicle
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Guys,
Thanks, you brought up some interesting points. I will attempt to try and not break anything else. Thanks for the injector fuse tip! Cross your fingers for me that she passes emissions...
Thanks, you brought up some interesting points. I will attempt to try and not break anything else. Thanks for the injector fuse tip! Cross your fingers for me that she passes emissions...
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Recovery Vehicle
Joined: Oct 2014
Posts: 1,222
Likes: 130
Just an update for posterity:
Tried a few times to adjust idle and clear the code, checked fuses, BUT;
it ended up being the passenger side precat 02 sensor. New one in and CEL 045 stayed off. Went to smog the next day and passed. FINALLY got tags!
Tried a few times to adjust idle and clear the code, checked fuses, BUT;
it ended up being the passenger side precat 02 sensor. New one in and CEL 045 stayed off. Went to smog the next day and passed. FINALLY got tags!
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