|
Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
|
Thread Tools | Search this Thread |
10-19-2020, 09:48 PM | #1 |
Car Goes Bang
Join Date: Sep 2017
Drives: 2013 FRS, 2014 BRZ
Location: Indiana
Posts: 32
Thanks: 13
Thanked 19 Times in 13 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
Engine Code P0451 problems
It's been a long ride, but at this point I'm getting close to the end of my rope...
I have a CEL with a P0451 code that I can not figure out where it is coming from and no amount of searching for this specific to our cars is yielding results. I just got done replacing the evap canister and canister pump module (yes getting those out is a pain even after dropping the dif) and I am still getting this damn error (shows up after 2 starts). Odd thing is it is the only error I get (i.e. no large of small leak errors). However, as the car drives it causes issues with running due to what I assume the learning part of the ECM and the interplay with the evap solenoid. Clearing the error even when the evap solenoid is deleted from the 'circuit' changes the engine RPM so it is still effecting the learned part of the tune regardless (went into limp mode on one trip when the evap solenoid was in and tank was full). Given there are no leak errors I assumed that it must be the sensor on the canister but no dice. Anybody have any ideas what is going on with this? BTW I would be very appreciative if anyone has the expected voltage/resistance/etc for the canister module so I can at least check the damn thing with a voltmeter and hope to chase it back to the ECM. I have the wiring diagram. Background impacting this issue: - New IAG Stage 2 FA20 12.5:1 (newly installed by 'high end' performance shop after Toyota destroyed my engine with the valve spring recall...) - Edelbrock SC with Delicious Tuning FlexFuel kit (updated tune but having issues getting it done due to this problem/ currently running pump gas) - New fuel pump, fuel pressure sensor, and Radium fuel filter (fuel pressure is good) - New fuel pump hanger (and hanger on the other side). Both threaded locking caps and gaskets seem fine and in place but I have not done a pressure test on the tank...) - New evap solenoid - New gas cap - New charcoal canister - New canister pump module (sensor unit next to the charcoal canister) - All hoses/connectors I could see appear in decent shape. The only screwy thing is the performance shop initially put the wiring harness for the evap solenoid from the edelbrock kit and not the DT kit onto the evap solenoid. They then doubled back the DT kit plugs onto themselves. Weirdly this keeps the supercharger coolant pump from running. They ran the car 500 miles at low/mid RPM during break in an never caught it. After correcting the wiring everything seems to work, but I still get the 451 code. No clue if this would have anything to do with it but... There are a lot of other mods but they likely would not impact this. |
10-19-2020, 10:11 PM | #2 | |
Senior Member
Join Date: Aug 2014
Drives: 2013 FR-S
Location: Northwest Iowa
Posts: 7,354
Thanks: 454
Thanked 4,542 Times in 2,947 Posts
Mentioned: 59 Post(s)
Tagged: 5 Thread(s)
|
Quote:
Sent from my ONEPLUS A5010 using Tapatalk |
|
10-19-2020, 10:49 PM | #3 | |
Car Goes Bang
Join Date: Sep 2017
Drives: 2013 FRS, 2014 BRZ
Location: Indiana
Posts: 32
Thanks: 13
Thanked 19 Times in 13 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
Quote:
BTW AFR, LTFT and STFT seem fine when everything is cleared and not in check mode at the sensor. |
|
10-19-2020, 11:01 PM | #4 | |
Senior Member
Join Date: Aug 2014
Drives: 2013 FR-S
Location: Northwest Iowa
Posts: 7,354
Thanks: 454
Thanked 4,542 Times in 2,947 Posts
Mentioned: 59 Post(s)
Tagged: 5 Thread(s)
|
Quote:
Have you talked to Zach yet? He might know something that Bill doesn't. He's one smart cookie. Zach isn't with Delicious anymore. I don't recall which shop he went to... Racers line? Counter space garage? Sent from my ONEPLUS A5010 using Tapatalk |
|
10-19-2020, 11:12 PM | #5 |
Senior Member
Join Date: Jun 2018
Drives: TRD R.S. 1.0 FRS
Location: California
Posts: 181
Thanks: 87
Thanked 50 Times in 35 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
https://www.ft86club.com/forums/showthread.php?t=88940
Old thread that talks about potential resolution. Usually if youre getting evap codes and youre using a flex fuel kit or aftermarket market 02 sensor, one of those uses the evap input so you’ll need to get it disabled in your tune. Thats what my tuner did. I didnt have P0451 like yours but i had a few like P0452 after i used the evap input for my wideband 02 sensor |
|
|
Tags |
p0451 |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Problems related to code: P0451 | Teratorry | Issues | Warranty | Recalls / TSB | 1 | 07-23-2020 01:52 PM |
P0451, P0451, P0453 Fix? | jaimeFRS | Scion FR-S / Toyota 86 GT86 General Forum | 3 | 04-29-2020 03:01 PM |
Problems updating form ZA1JA01G to ZA1JD00G ROM - fixed disable U0155 code in rom | steve99 | Software Tuning | 38 | 09-03-2014 06:44 PM |
Engine problems | Gerri | Engine, Exhaust, Transmission | 2 | 08-14-2012 07:14 AM |