P1258 PONTIAC - Engine Coolant Overtemperature Protection Mode Active
- Faulty Engine Coolant Temperature
- Engine Coolant Temperature harness is open or shorted
- Engine Coolant Temperature circuit poor electrical connection
- Engine Light ON (or Service Engine Soon Warning Light)
P1258 Pontiac DescriptionIn order to reduce the engine temperature the Powertrain Control Module (PCM) has the ability to disable a number of fuel injectors during an engine over temperature condition. The PCM considers the engine over temperature whenever the Engine Coolant Temperature (ECT) reaches a predetermined temperature. This DTC sets in order to show that the PCM detected an over temperature condition and that the system engaged the protection mode.
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