Question about 2000 Saturn SL

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Engine Coolant Temperature sensor

I've replaced the ICV and the TCP, carbed-spayed the vaccum hoses and still have a high idle once the car reaches running temperature
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Choke stuck . check and see if the car has a senor on the carb and spray around the base of the carb . but i think the high ide senor is bad .

Posted on Jan 21, 2009

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Engine revs up and down when reaching operating temperature, replaced all sensors sonata 2.5 v6 1999


Check coolant level to make sure it is full. Low coolant can cause surging idle. Also, check throttle plate for dirty/coking causing minimum idle to be affected. If throttle plate is dirty, clean with carb cleaner and retest

Oct 12, 2015 | Cars & Trucks

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it would usually be the tps (throttle positioning sensor) but you can also check the icv (idle control valve)

Dec 31, 2013 | Cars & Trucks

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P0128 code on 2006 ford escape, solutions?


Diagnostic Test Code (DTC) P0128 has a generic description of "Coolant Temperature Below Thermostat Regulating Temperature".

The Poertrain Control Module (PCM) checks the coolant temperature at startup. It then calculates the period of time that it should take for the engine to reach operating temperature (or thermostat regulated temperature). After the calculated period of time, the PCM again checks the coolant temperature. If it has not reached operating temperature, a code P0128 flag is set in mode 6.

If the engine still has not reached operating temperature after 5 more minutes of continuous engine operation, code P0128 is set in continuous memory and the Check Engine (or Malfunction Indicator Light "MIL" is turned on.

Possible causes:

> A stuck-open engine coolant thermostat (MOST common)
> A skewed Engine Coolant Temperature (ECT) or Cylinder Head Temperature(CHT) sensor (working, but not reading correct temperature)
> Low engine coolant level (causing the sensor to not read correctly)

First, the engine coolant (antifreeze) level should be checked. If it is low, it is recommended to perform a cooling system pressure test to find out WHY.

Then, the actual engine temperature should be measured with an infrared thermometer near the ECT or CHT. The reading from the thermometer should be checked against the live sensor data with a scan tool. (PLease note that MOST generic OBD code readers CANNOT perform this function.)

If the reading from the thermometer and the sensor data is within 10 degrees F of each other, replace the thermostat. Otherwise, the sensor circuit should be checked for high resistance (loose or corroded connector, damagd wire, etc.). If no high resistance is measured in the rest of the circuit, the sensor should be replaced.

Jan 03, 2012 | Ford Escape Cars & Trucks

1 Answer

Service engine soon light on and engine idles fast.


Look for vacuum leaks anywhere between the throttle plate/s and cylinder heads. Throttle body gasket or intake manifold gaskets could be bad. A vacuum hose could be bad. Also, try pinching the hose to the brake booster and seeing if the idle returns to normal. You can use aerosol carb cleaner to help find the leak. Spray a little around and listen for the engine speed to increase. When it does, you've found your leak.

You may also have a bad throttle position sensor and/or a bad coolant temperature sensor. Find a buddy with a scan tool and have them tell you what codes are stored. That should get you pointed in the right direction.

Sep 12, 2011 | 1999 Chevrolet Silverado 1500

1 Answer

Engine miss fires after reaches normal running temp. I have a 91 chevrolet 1 ton van with a 350 4bolt engine and a turbo 400 transmission


most likely its a vaccum leak, once it gets warm, the hose or gasket expands causong it to misfire, what you need to do is after it warms up, get a carb spray and spray around the engine slowly so you can notice the change in the idle, once you locate the change in idle area, thats where the problem is, good luck

Mar 10, 2011 | 1991 Chevrolet C/K 3500

1 Answer

2001 town&country had replaced radiator but now fan stop working van is not over heating and heat is good hanve no other problem just fan s not working olease help me to find out waht could be problem


ANY TIME YOU CHANGE RADIATOR ONCE YOU GET THE NEW RADIATOR IN PLACE.FILL RADIATOR WITH ANTIFREEZE CRANK VECHICLE UNTIL THERMOSTAT OPEN. WHEN YOU TOUCH THE TOP RADIATOR HOSE.IF TOP HOSE HOT THERMOSTAT OPEN.CHECK RADIATOR COOLANT LEVEL IF DROPPED ANY.ADD COOLANT UNTIL LEVEL QUIT DROPPING. WHEN COOLANT LEVEL QUIT DROPPING YOUR COOLANT LEVEL IS CORRECT. NO MORE AIR IN COOLANT SYSTEM OR AROUND COOLANT TEMPERATURE SENSOR COOLANT FAN SHOULD TURN ON ONCE ENGINE GET TO CERTAIN COOLANT TEMPERATURE.SEE IF COOLANT TOO LOW NOT ENOUGH COOLANT REACH COOLANT TEMPERATURE SENSOR. SENSOR CANT TURN ON FANS IF ITS NOT IN HOT COOLANT. WHICH DECREASE ITS RESISTANCE WHICH CLOSE OR GROUND CIRCUIT CAUSING COOLING FANS TURN ON.

Nov 25, 2010 | Chrysler Town and Country Cars & Trucks

1 Answer

My 2002 xterra has started running hot..code po 217 came on..after gas cap was put on wrong..cleared code put gas cap on right then fine for 2 weeks..when idleing heat gauge rises high..as soon as i rev...


Hi Code P 0217 does point to the thermostat but it also points to the wiring, cooling system, and the temperature sensor, to check the thermostat start engine then once the temperature gauge in the car reaches normal the thermostat should open and the top hose that goes into the radiator will warm up quickly as the thermostat opens, if the thermostat is stuck in it's open position the top hose will start warming up before the engine reaches it's working temperature, hopefully i have explained it clearly,

Mar 17, 2010 | 2003 Nissan Xterra

1 Answer

The check engine light on a 2001 beetle read code PO118 engine coolant temperature circuit high input. what do i do?


16502/P0118/000280 From Ross-Tech Wiki Jump to: navigation, search Contents [hide] if (window.showTocToggle) { var tocShowText = "show"; var tocHideText = "hide"; showTocToggle(); } 16502/P0118/000280 - Engine Coolant Temperature Sensor (G62): Signal too High Possible Symptoms
  • Difficulties with starting a cold engine.
  • Starting the engine when engine is warmish or warm, idle rpm immediately is 1200 - 3000 rpm.
  • RPM at idle is irregular.
  • With all engine temperatures idle rpm will often vary between 900 - 1000 rpm.
  • With engine warm (90 °C) the engine temperature suddenly drops (70 °C) and slowly comes back to 90 °C.
  • Bad acceleration during warm-up.
  • Diesel Engines: Glow plug indicator may be on for a longer than normal time or at ambient temperatures where it shouldn't come on at all.
Possible Causes
  • The electrical signal coming from G62 is too low
  • Wiring and/or connections faulty (short circuit?)
  • Engine Coolant Temperature Sensor (G62) faulty
Possible Solutions
  • Check wiring and connections
  • Check / Replace Engine Coolant Temperature Sensor (G62)
Special Notes
  • In many cars between MY 1995-2002 the G2/G62 had a bad reputation for failing often. The original G2/G62 sensor is black and the improved replacements are green.

Jan 26, 2010 | 2000 Volkswagen Beetle

2 Answers

High Idle between 1900 and 2100 rpm's


Check vacuum lines/hoses and air idle screw. Also helps to know if it started all of a sudden or you bought it like this???

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