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At this point DTC P1299 is set in the PCM which can be retrieved using a scan tool.Īir is drawn into the deactivated cylinders. This indicates that long term engine damage can occur and vehicle emissions will beĪffected. The RPM will be limited belowģ,000 RPM initially then will slowly be ramped down with time to as low as 800 RPM. Will start to control the engine by cutting out 2 cylinders and restricting load. Stage 2 of the strategy commences if the lamp and temperature gauge are ignored by the driver. ![]() This indicates to the driver that the engine is approaching critical limits and should be stopped.Īt this point DTC P1285 is set in the PCM which can be retrieved using a scan tool. If the engine is not switched off and the temperature continues to rise, the Powertrain Check Lamp is The PCM, which moves the temperature gauge pointer into the red zone. Stage 1 of the strategy commences if the engine starts to overheat. The reason is that a good CHT sensor is able to reliably track engine block temperature atĪll times, while the ECT sensor will fail to do so when the engine coolant is dumped. Open loop mode is made based on sensor availability and sensor failures. When the engine starts to overheat, the decision to go into closed loop or At least that would be my best guess.Ī strategy called Fail Safe Cooling is built into the PCM that will control the engine if it starts to overheat.įail Safe Cooling has two modes: A ‘Closed Loop’ mode that relies on CHT sensor and an ‘Open Loop’ Your truck is probably employing one of these failure modes due to a failed sensor. Thanks.įrom the Ranger factory service manual. The engine will continue to operate at a reduced power level.Īnyway, open to the fact that I have probably done what I can at this point but figured would see what the internet thought. Powertrain Control system has detected an engine overheat condition. Engine control system has detected the engine has reached an 'Overtemperature condition' Engine control system has detected that two of the engine temperature sensors are reporting temperature readings that differ by an amount greater than expected Timing feels to convenient for it to not be the cold, although it worked fine for several even colder days and through colder nights leading up to this.įord App shows multiple Engine light alerts Although knowing my luck they will pull it into the heated shop, it will sit for a few hours, and then when they get to it everything will be working fine. I am currently waiting on a tow (sometime in the next 8-12 hours if i am lucky) as I am not confident in limping the truck to the dealer in this weather but was wondering if anyone here had any thoughts because if i can get it out of limp mode i can drive it to the dealer sooner, as it is definitely getting checked either way. I also noticed the truck shows an outdoor temperature of -29C when the interior of the garage is significantly warmer than that. As of this morning, Truck seems pretty much thawed, and the engine bay is warmish but I am still getting the same issues. I limped the truck into a detached garage where it could warm up a little bit (unfortunately still below freezing) more hoping that it was just a symptom of extreme cold, mostly hoping I could get it out of Limp mode to drive it to Dealer. ![]() Truck started fine yesterday after being plugged in overnight for the cold but within a minute gave me an engine coolant overheat warning and put the truck in Limp mode. Not awesome but not uncommon either, this is my 3rd winter with the truck and have a new issue I have not had with this truck ![]() For context, in Alberta Canada where we are currently experiencing unseasonably cold weather, daytime highs in the -26C range.
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