Question about 2000 Ford F350 Super Duty Super Cab

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Engine light comes on

Service soon light comes on temperature gauge go in red service code is P1299 loss power turned engine off went back to normal keep doing it

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  • Anonymous Mar 17, 2014

    service engine soon light came on, 2006 galant, code p0401. light went off next day. what happened?

  • Anonymous Mar 27, 2014

    service engine light came on,oil light came on

  • Anonymous Mar 29, 2014

    turned truck off when I turned it on the light didnt return, is the code still stored

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You are dealing with a bad temperature switch

Posted on Jun 18, 2008

  • B J WILSON Jun 18, 2008

    a bad temperture switch gives it a false reading so the ecm tells it to shut down

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Hi there!

P1299 Cylinder head over temperature protection active.

I would want to know why this is overheating. It could be a fuel issue, timing is too advanced (due to faulty sensors) or just a duff temperature sensor itself.

Needs investigation though as performance will be affected.

(If this assists in a solution, please rate as Fixya! Thanks.)

Posted on Jun 18, 2008

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Cooling problem,code#P1299,on a 06 Ford Escape 2.3l


P1299 - Cylinder Head Over Temperature Protection Active Description: Indicates an engine overheat condition was detected by the cylinder head temperature (CHT) sensor. An FMEM strategy called fail-safe cooling was activated to cool the engine. Possible Causes:
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Your PCM is going into fail-safe cooling mode. If temps really are normal then you may have a bad CHT (cylinder head temperature) sensor. Disconnect battery (negative wire) for one minute to get rid of code then road test your car to see how soon the P code comes back.

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Engine RPM/Vehicle Speed Limiter The powertrain control module (PCM) will disable some or all of the fuel injectors whenever an engine rpm or vehicle overspeed condition is detected. The purpose of the engine rpm or vehicle speed limiter is to prevent damage to the powertrain. The vehicle will exhibit a rough running engine condition, and the PCM will store a Continuous Memory DTC P1270. Once the driver reduces the excessive speed, the engine will return to the normal operating mode. No repair is required. However, the technician should clear the PCM and inform the customer of the reason for the DTC.
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Fail-Safe Cooling Strategy The fail-safe cooling strategy is activated by the PCM only in the event that an overheating condition has been identified. This strategy provides engine temperature control when the cylinder head temperature exceeds certain limits. The cylinder head temperature is measured by the Cylinder Head Temperature (CHT) sensor. For additional information about the CHT sensor, refer to PCM Inputs for a description of the CHT sensor. Note: Not all vehicles equip with a CHT sensor will have the fail-safe cooling strategy.
A cooling system failure such as low coolant or coolant loss could cause an overheating condition. As a result, damage to major engine components could occur. Along with a CHT sensor, the fail-safe cooling strategy is used to prevent damage by allowing air cooling of the engine. This strategy allows the vehicle to be driven safely for a short time with some loss of performance when a overheat condition exist.
Engine temperature is controlled by varying and alternating the number of disabled fuel injectors. This allows all cylinders to cool. When the fuel injectors are disabled, their respective cylinders work as air pumps, and this air is used to cool the cylinders. The more fuel injectors that are disabled, the cooler the engine runs, but the engine has less power.
Note: A wide open throttle (WOT) delay is incorporated if the CHT temperature is exceeded during WOT operation. At WOT, the injectors will function for a limited amount of time allowing the customer to complete a passing maneuver.
Before injectors are disabled, the fail-safe cooling strategy alerts the customer to a cooling system problem by moving the instrument cluster temperature gauge to the hot zone and a PCM DTC P1285 is set. Depending on the vehicle, other indicators, such as an audible chime or warning lamp, can be used to alert the customer of fail-safe cooling. If overheating continues, the strategy begins to disable the fuel injectors, a DTC P1299 is stored in the PCM memory, and a malfunction indicator light (MIL) (either CHECK ENGINE or SERVICE ENGINE SOON), comes on. If the overheating condition continues and a critical temperature is reached, all fuel injectors are turned off and the engine is disabled.

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