Code 1258 on 2008 buick enclave

Question

Changed out thermostat and engine temperature sensor

Answer 1

Hi there

Since it's an over temp issue, check and make sure the cooling fans are working and that the car is full of coolant. If there is an air pocket in the heater core it could give you this same code.

P1351 FORD - Ignition Diagnostic Monitor Circuit Input Fault

Read more: https://www.autocodes.com/p1351_ford.html