Code 22 diagnosis

[belair7mgte]

So yesterday I took my 87 Supra turbo out, and once I got home I heard a high pitch squeeling noise and saw coolant leaking out with a lot of white smoke pouring out from around the thermostat housing (possibly somewhere underneath?) I also checked my codes today and the only one that came up was code 22 meaning there's something malfunctioning in my water temp sensor circuit. I just replaced the radiator with a fluidyne and I also replaced the thermostat...I did some research on the smoke issue and someone stated it may be the heater core, but would that even fix the code issue?

Thanks!

Rob

 

[jdub]

Coolant leaks around the T-stat housing:
- Did you replace the T-stat gasket?
- Turbo coolant lines
- 90 deg rubber hose from the block hardline to the bottom of the water neck
- Gasket between the water neck and head

A leak like this is not going to cause a ECU temp sensor failure. Fix the leak, pull the EFI fuse to reset, and recheck codes after you drive it.

 

[belair7mgte]

Well I did replace the thermostat gasket, and I did take it for a drive just now and the same smoke issue came right back up with a huge coolant leak but once I reset the fuse code 51 came up instead which is A/C switch circuit, A/C switch, A/C amplifier, Throttle position sensor circuit, or the Throttle position sensor...which led me to remember I also have an idle issue on occasions where the car starts but simply idles out..any ideas?

 

[jdub]

Fix the coolant leak.

 

[Who]

I cant believe you have a coolant leak, smoke and steam but you are driving around town and you keep chasing codes?? Oh yeah and lets not forget you have a idle problem as well. Please park the car, remove / move the power steering reservoir and replace the 90deg. hose, and both turbo lines first. :aigo:

 

[belair7mgte]

haha naw I discovered the coolant leak after I drove it around town, I might just get a whole new 7mgte engine, not too sure though, how much would it cost to simply replace the motor?

 

[jdub]

You want to replace the motor because of a coolant leak?!?!

:nono:

 

[belair7mgte]

noo not because of a coolant leak, its just my motor has a ton of miles on it and my friend is giving me a deal for a 7m with a bunch of internals in it, saving me like a grand in the long run for an almost new engine