Locate and repair the source of the engine oil contamination. If there has not been a recent gasket replacement, Check the vehicle's warranty history to determine if any engine gasket Flush the cooling system and install new DEX-COOL(R) mixture as outlined in Re-install the low coolant sensor into the vehicle andĦ. Use Brake Parts Cleaner to flush removed deposits from the lowĬoolant sensor probe. Using a small wire brush or emery cloth, polish the low coolant level sensor ^ Light is on - Replace the low coolant sensor and re-checkĥ. Key on and the engine off, observe the low coolant light for at least 15 Sharp probe (3) attached to the ground wire, ground the coolant sensor probe Connect a ground wire (1) to the battery negative terminal. With the key off, connect the coolant level sensor into the vehicle's wiring ^ Light is on - Chassis wiring or instrument cluster concern.įollow the appropriate diagnostic information in SI.Ĥ. With the key on, the engine off and the coolant level sensor disconnectedįrom the vehicle wiring harness, observe the low coolant light: Refer to Coolant Level Module Replacementģ. If the low coolant light operates properly,ĭiagnose the cooling system for loss of coolant as outlined in SI. If the coolant is low, add proper amount of 50/50 Verify that the coolant is at proper level in the radiator and Flush cooling system only when instructed byġ. Discoloration of theĬoolant recovery bottle is normal and does not necessarily indicate thatĬoolant contamination is present. "aftermarket" over-the-counter sealing and cooling supplements mayĪffect the operation of the low coolant level sensor. Systems, other than what is approved and recommended by GM. Important: No coolant supplements should be used in GM cooling This film results inĪ false activation of the coolant level indicator.ĭiagnose low coolant level system operation and check the sensorįor oil contamination using the procedure listed below. Once in the coolant, the oil leavesĭeposits on the level sensor creating an insulating film. Possible sources of oil contamination are internalĮngine leaks, improper service procedures, or the addition of some types ofĪnti-leak additives to the cooling system. The cause of this condition may be due to engine oilĬontaminating the coolant. Some customers may comment that the low engine coolant level Operation/Check Sensor for Oil Contamination) Low Engine Coolant Level Indicator Always On (Diagnose Low Coolant Level System Refer to Coolant Level Module Replacement in Engine Cooling. Replace the engine coolant level indicator module.noticed there is a green and yellow male wire connection is not read more. Right front turn signal on 1999 buick century will not blink. Turn the ignition switch to the RUN position. Buick Century: Right front turn signal on 1999 buick century.Disconnect the engine coolant level indicator module connector.The engine coolant level indicator module is on the right side of the radiator just down below from the radiator cap ! The engine coolant level switch grounds the indicator with the coolant level in the coolant reservoir below the minimum recommended level. Good solid reliable car.Hi Tammie, Is the coolant level low ? If not , It has been a great car for 12 years and it will most definitely last another 12. It has spent most of it's life outside, but the paint still looks very good. In 12 years time I have spent under 4000 on maintenance and 2500 of it was on the semi restoration this year. It runs and drives like brand new no issues at all. New tires, brakes, struts, motor/tranny mounts, tires, headlights,exhaust system, wheel bearings, paint touch up, a few other piddly things. This year (2015), the car was showing some signs of wear, and since it ran and drove quite well still, I decided to do a semi restoration. I have done all of the regular maintenance such as oils, filters, brake pads,coolant, tune up, -again cheap and easy. The cost and level of difficulty were low, though. A few things have gone wrong such as power windows, a blower resistor, led resistor in gauge cluster, and a/c clutch coil. It has to do with the coolant level module located on the radiator. As far as reliability, the car has failed to start only one time-when the original battery gave out after six years. This problem is a common problem with all of these cars. I have had it for 12 years and have put about 100,000 on it.
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