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A. Penland
A. Penland, Ford Senior Master Technician, ASE
Category: Lincoln
Satisfied Customers: 6535
Experience:  ASE Master Certified. ASE Gasoline Engine Performance Certified,Ford Senior Master Technician
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P1299 code, P1299. Can I reset it by unplugging the battery,

Customer Question

P1299 code
JA: Just to clarify, what's the exact code? And have you tried to reset it?
Customer: P1299. Can I reset it by unplugging the battery
JA: What is the model/year of your Lincoln?
Customer: 2001 ls
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: The dealership told me I had a blown head gasket, bought a used engine with 65000 miles and had it installed. Still had the same problem, overheating. But not all the time. Can't trust it to drive it regularly
JA: Anything else you want the mechanic to know before I connect you?
Customer: No
Submitted: 9 months ago.
Category: Lincoln
Expert:  A. Penland replied 9 months ago.

Is the engine actually overheating?
What engine does your LS have?

Customer: replied 9 months ago.
3.9l. The funny thing about it is, when I took the car back to the mechanic to see why it was running hot, it hasn't ran hot since, I have driven it about 500mi. And hasn't ran hot once but it's still throwing that code.
Customer: replied 9 months ago.
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Expert:  A. Penland replied 9 months ago.

Did you use the sensors from the used engine or the old engine?

Customer: replied 9 months ago.
I didn't mean to end my chat with the expert
Customer: replied 9 months ago.
That I dont no. I will replace them , if I need to. I got about 3000 tied up in this motor.
Expert:  A. Penland replied 9 months ago.

First make sure all the air is purged from the cooling system properly and that the engine is not actually overheating. That code is caused by the engine running too hot. Not actually by a bad sensor.