When i drive the vehicle normally, and the vehicle has reached normal operating temp, the temp light( blue ) comes on and flashes repeatedly for several minutes then goes off. And will return when ever it feels like it. The vehicle is operating normally and feels like its running fine, aswell the coolant reseviour is full when cold and at normal operating temp. * NOTE: the bottom part of the air intake filter box has been removed and has a performance K&N air filter. Increased air into the engine shouldnt have caused this. All sensors are still connected. Whats going on here? has anyone had this happen? If you have the answer to my question i would be very greatful! Thanks
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It could be a plugged heater core or heater control problem. I assume the blower is working, but the air is cold. The first thing to check is the coolant level, make sure there is coolant in the resivoir. Next see if the temerature gauge reaches the normal operating temperature range. If the gauge reads cold most of the time, it would tell you that the thermsotat is faulty and not allowing the engine to reach full operating temperature. If your car doesn't have a temp gauge, the blue cold engine light might stay on for an extended period of time. The thermostat is supposed to not allow coolant flow in the radiator until the engine reaches operating temperature. If you drive the car for a couple of minutes, from cold start, the radiator or upper hose should be cool until the engine reaches operating temp.
1. Cycle the ignition key ON-OFF-ON-OFF-ON within 5 seconds. To cycle the ignition key ON means to turn it only as far as it takes to get the radio to come on. It does not mean to turn the engine on.
2. Count the number of times the "check engine" lamp on the instrument panel flashes on and off. The number of flashes represents the code. There is a slight pause between the flashes representing the first and second digits of the code. Longer pauses separate individual codes. For example, flash-flash-flash [pause] flash-flash represents the code 32.
A code of "55" represents end of error codes. If this is all you get then no error codes are stored in the computer. This is the normal condition
CODE Description of Trouble Code 11 Timing belt skipped 1 tooth or more from initial learned value, Intermittent loss of either camshaft or crankshaft position sensor, No crank reference signal detected during engine cranking 12 Direct battery input to PCM was disconnected within the last 50 key-on cycles (normal) 13 No change in MAP from start to run 14 MAP sensor voltage too low 15 No vehicle speed sensor signal 17 Closed loop temp not reached or engine cold too long 21 02s sensor problem (oxygen sensor), upstream or down stream 22 Engine coolant temp sensor out of range 23 Intake air temp sensor out of range 24 Throttle Position sensor out of range 25 Idle air control motor circuits, target idle not reached (+/- 200),vacuum leak found 27 Injector control circuit 31 Evap purge flow monitor failure or evap solenoid circuit 32 EGR system failure 33 A/C clutch relay circuit 34 Speed control Solenoid circuits 35 Rad Fan control relay circuit 37 Torque converter clutch solenoid CKT or park/neutral switch failure 41 Generator field not switching properly 42 Fuel pump relay control ckt, Auto shutdown relay control ckt, No ASD relay output voltage at PCM, Fuel level sending unit volts out of range, Fuel level unit No change over miles 43 Multiple/ single cylinder misfire 44 Battery temp sensor volts out of range 46 Charging system voltage too low 51 Fuel system lean 52 Fuel system rich 53 Internal control failure 54 No Cam signal at PCM 55 End of error messages (If you get this only, no errors were found) 62 PCM failure SRI mile not stored 63 PCM Failure EEPROM write denied 64 Catalytic Converter Efficiency Failure 65 Power steering switch failure
The blue coolant temperature light comes on when the coolant is below 177 degrees. That is the bottom threshold for the Overdrive to engage. In other words, the OD will not activate, (actually, it is prevented from engaging) until the coolant temperature reaches 177 degrees F. This is purposely done, because allowing the OD to engage sooner will allow excessive emissions, with a colder engine.
There is no need to wait until the blue light goes off to start driving. Your transmission just won't make the final shift until the optimum temperature is reached. This is a normal condition.
If you have an actual issue, your 'check engine' light will illuminate, and it will stay on.
If the light goes out after engine gets alittle warm, this is normal. Since there is no temp guage, VW uses this light to inform that the engine is cold. When that same light flashes red, it means that the coolant is low or the engine is overheating.