Morning guys. Yesterday I changed the PCV and the charcol canister. I was so proud of myself... Today I got codes 24, 31, and 71... At the moment, the truck is running fine, actually, better than ever. I'll go over what I did and make sure everything is connected, but I would appreciate your thoughts on what could it be. Thanks!
Codes 24, 31, 71 (1 Viewer)
- Thread starter PFMFJ80
- Start date
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iptman
SILVER Star
What do those map to in the FSM?
iptman
SILVER Star
For Sale - 40, 50, 60, and 80 series FSM for a hell of a price.
Grab the 1990 version. I haven't downloaded it but the file name suggests it covers the FJ80.
Grab the 1990 version. I haven't downloaded it but the file name suggests it covers the FJ80.
OTRAMM
Supporting Vendor
I can look it up when I get to the shop tomorrow.
- Thread starter
- #6
Thanks Guys!
Here are the codes:
24 - Intake Air Temperature Sensor signal.
31 - Air Flow Meter signal (Vacuum Sensor signal).
71 - EGR System.
I had not reset the ECU after my work yesterday. I just did that. Hopefully they don't come back and it was just the ECU relearning...
Here are the codes:
24 - Intake Air Temperature Sensor signal.
31 - Air Flow Meter signal (Vacuum Sensor signal).
71 - EGR System.
I had not reset the ECU after my work yesterday. I just did that. Hopefully they don't come back and it was just the ECU relearning...
Trollhole had some you could download.
The Alldata DIY online manual is very good for this truck.
- Thread starter
- #9
UPDATE - The truck is not running....
So I'll make this short:
- March 11 I got the following codes:
24 - Intake Air Temperature Sensor signal.
31 - Air Flow Meter signal (Vacuum Sensor signal).
71 - EGR System.
- I reset the EFI and did not get any codes until Saturday (65 miles after the reset), where I got code 71 (EGR system).
- I used the car today with no issues. Running great. I got home, put the kid to sleep and jumped in the truck to go out to buy something we needed...it did not start. It cranks, but makes no sign of wanting to start and NO CEL. I don't think I hear the fuel pump either.
I've been reading the John Held guide on this but ... I'm pretty lost when it comes to these diagnostic tests and measurements of voltage. I need help guys. I'll try to go over the FSM and figure it out, but any input is greatly appreciated!
So I'll make this short:
- March 11 I got the following codes:
24 - Intake Air Temperature Sensor signal.
31 - Air Flow Meter signal (Vacuum Sensor signal).
71 - EGR System.
- I reset the EFI and did not get any codes until Saturday (65 miles after the reset), where I got code 71 (EGR system).
- I used the car today with no issues. Running great. I got home, put the kid to sleep and jumped in the truck to go out to buy something we needed...it did not start. It cranks, but makes no sign of wanting to start and NO CEL. I don't think I hear the fuel pump either.
I've been reading the John Held guide on this but ... I'm pretty lost when it comes to these diagnostic tests and measurements of voltage. I need help guys. I'll try to go over the FSM and figure it out, but any input is greatly appreciated!
- Thread starter
- #10
30 Minute Update (LOL) - It was the EFI relay. I switched it for the horn relay and she fired right up! Whew! I read some posts on how it could be the AFM and, since I got those codes before, I was panicking.....Hahaha. Thanks for understanding!
Glad you got it figured out 
