coolant change and now 4 dtc's

[vailskier3]

did my coolant change today, and when i started her up with the new green prestone coolant, i threw these codes. any ideas why?

[PCM] P0116 - Engine Coolant Temperature (ECT) Sensor Performance (Old) (Immature)
[PCM] P0134 - HO2S Circuit Insufficient Activity Bank 1 Sensor 1 (SES) (Pending) (History) (Immature)
[PCM] P0520 - Engine Oil Pressure Sensor/Switch Circuit Malfunction (History) (Immature)
[PCM] P2432 - Secondary Air Injection System Air Flow/Pressure Sensor Circuit Low (Pending) (Old) (History) (Current) (Immature)

[Explicit_Spade]

Does your motor leak at all?

[vailskier3]

no...

[Explicit_Spade]

The reason I ask is because with coolant, oil and airflow issues, its possible that a head gasket could be bad. Hopefully someone has an alternate solution.

Another question, did you make sure there was no air in the system?

[Slick2500]

I highly doubt changing your coolant would cause all those sensors to go bad. Did you get water on anything or anywhere, accidentally pull a wire out or forget to hook something back up?

[vailskier3]

well, i probably did get some air in there...idk, the secondary air one could be due to my headers???? maybe???

[motorking]

did my coolant change today, and when i started her up with the new green prestone coolant, i threw these codes. any ideas why?

[PCM] P0116 - Engine Coolant Temperature (ECT) Sensor Performance (Old) (Immature)
[PCM] P0134 - HO2S Circuit Insufficient Activity Bank 1 Sensor 1 (SES) (Pending) (History) (Immature)
[PCM] P0520 - Engine Oil Pressure Sensor/Switch Circuit Malfunction (History) (Immature)
[PCM] P2432 - Secondary Air Injection System Air Flow/Pressure Sensor Circuit Low (Pending) (Old) (History) (Current) (Immature)

Hi,
I am the tech manager at Prestone and a mechanic as well. I doubt any of these are related to changing your coolant. If you tell me the year of your car and send your email address to me at Jay.Buckley@Honeywell.com, I will look up and email you troubleshooting instructions for each code.

[BillBoost37]

Being that you changed coolant.. check the grounds on the front of the transmission. Also check your fuses.

This shouldn't be a head gasket, especially since they are the least common gasket to ever go on these motor.s