![]() Return to idle and verify hot air is still coming from the heater. ![]() Maintain engine speed of 2,000 rpm for 3-5 minutes or until hot air comes from the heater. Reopen the heater air bleed to release any trapped air and close again. Start the engine and turn the heater to the defrost (90?F) position.Ĭlose the heater air bleed when a steady stream of coolant escapes during engine idle.Īllow the engine to idle for 5 minutes, add coolant to the degas bottle as needed to maintain the cold fill MAX mark. * Install the engine fill cap until contact is made and then tighten an additional 45 degrees (1/8 turn). (Usually if they do fail, they fail with a P1289 error.)Īdd coolant to the degas bottle allowing the system to equalize until no more coolant can be added.ĬAUTION: Care must be taken to make sure the accessory drive belt does not become contaminated with engine coolant.Īdd as much coolant as possible to the engine fill. It is possible that the sensor has failed, but that is very rare. It is rare, but sometimes the wire to the head temperature sensor does gets damaged and shorted to the engine somewhere. The most common cause for this error is failure to properly bleed the cooling system. P1299 is cylinder head over temperature protection active. Okay, P1229 is not a valid code for this car.Īre you sure it was P1229, or could it have been P1299? Thnaks to all that answered you were a big help! We would like to keep this car at least another year. I’d like to replace whatever parts noramlly go out so I’m not stuck on the side of road. The car has 170K and we just bought new tires. Which has 3 possibilities low engine coolant, drive belt off, or failed cylinder head temperature sensor. Yesterday we took it to Auto Zone and they checked for the code it is failing code p1229. ![]() ![]() The temperature on the car is now running normal. When he replaced the thermostat this time he found the old thermostat?s opening mechanism was sticking. He had to replace the housing, the plastic part behind the housing, and thermostat. When he took the thermostat housing apart he found the tabs that hold the thermostat in position were broken and the thermostat was hanging closed intermittingly. The dealership suggested we might want to replace the thermostat for $200. My husband replaced the pressure cap because the bottle and hose had burst. The dealership replaced the bottle in 2007, it overheated again and the dealership replaced the water pump hose that burst. ![]()
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