Question about 1989 Ford Bronco

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How do i fix a code 21 coolant temp sensor out of range and a code 24 air intake temp sensor out of range

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  • 141 Answers

Both these sensors share the same ground or power supply i would check that first before replacing them

Posted on Dec 09, 2012

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: ATS(Air temp sensor) CTS( Coolant temp sensor)

I have a 351 but they are common sensors and should be located same places. ATC is on the side or bottom of the air intake filter box. The CTS should be located on the goose-neck where your Thermostat is housed; this is comming off the intake mannafold and into the radiator.

Posted on Oct 03, 2008

  • 141 Answers

SOURCE: Coolant temp is normal while idling, cools off when fans cut in

i would check to see if the stat is working right, do you have rear heat on this vech? . if you do you may have a air pocket, the windstars have a metal tube coning from the water pump that gose to the heater core lines for the rear heat and they like to fail. they get a pin hole leak that hard to find, the water pump also likes to fail also, not moving a enough fluid under load the ends of the inmpler wear down

Posted on Dec 23, 2008

  • 169 Answers

SOURCE: sensor locations

air intake look at snorkel it could be part of mass air flow check intake for eng coolant

Posted on Aug 29, 2009

MrBirdMan64
  • 183 Answers

SOURCE: Why would my 1990 Mustang GT be runing extremely

The coolant temp. sensor you replaced - was the new one plastic or metal? There is a reported very high failure rate in the plastic sensors, and it is recommended that you go back to the metal style. Check the signal wire for the sensor - it should be less than .7 volts. If it is out of range, replace the sensor with a metal one.

It could also be caused by excessively high fuel pressure - caused by a sticking fuel pressure regulator, or a restricted fuel return line.
If you are able to check fuel pressure, it should have 35 - 45psi with key on, pump running - and 30 - 45 psi idling

Let me know how you make out!

Posted on Mar 30, 2010

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What does error codes 40 and 41 mean on my 1999 mitsubishi eclispe mean


11 Oxygen sensor fault.
12 Airflow sensor fault.
13 Intake air temp sensor fault.
14 Throttle position sensor (TPS) fault.
15 Idle speed control (ISC) motor position sensor fault.
21 Coolant temp sensor fault.
22 Crankshaft position (CKP) sesnor fault.
23 Camshaft position (CMP) sensor fault.
24 Vehicle speed sensor (VSS) fault.
25 Barometric (BARO) pressure sensor fault.
31 Knock sensor fault.
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36 Ignition timing adjustment signal fault.
39 Oxygen (O2) sensor fault.
41 Injector(s) fault
42 Fuel pump fault.
43 EGR fault.
44 Ignition coil (cylinders #1 & #4) fault.
52 Ignition coil (cylinders #2 & #5) fault.
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55 Idle air control (IAC) valve position sensor fault.
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Why are so many trouble diagnostic codes being thrown


sounds like you speed sensor and your throttle poistion sensor

Sep 02, 2014 | Cars & Trucks

1 Answer

Codes diagnostic


Code 13 is a problem with the intake air temp sensor.
Code 15 is a problem with the idle speed control motor sensor circuit.
Code 21 is a problem with the coolant temp sensor.
And code 24 is a vehicle speed sensor fault.
You would need to erase the codes and see how many come back again before you start testing components. Something may have happened to the engine wiring harness.

May 08, 2013 | 1992 Mitsubishi Mighty Max

1 Answer

Code 21


Code 21 is for coolant temp sensor out of range. Usually caused by a faulty sensor or connector at the sensor.
The sensor is telling the computer the coolant temp is 300 degrees or minus 50 degrees.

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My 2003 kia spectra comes up with P116 and P128 error messages. What do I need


p0116 is-- engine coolant tempurature ckt/range performance----- p0 128 is--coolant temp below thermostat regulating temperature. to fix these 2 codes are similar, change coolant tempurature sensor and thermotat all should be ok. make sure coolant in radiater is full. hope this helps you.

A code P0128 may mean that one or more of the following has happened:

  • Low engine coolant level
  • Leaking or stuck open thermostat
  • Faulty cooling fan (running too much)
  • Faulty coolant temperature (ECT) sensor
  • Faulty intake air temperature (IAT) sensor

Feb 07, 2011 | 2003 Kia Spectra

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Jaguar xj6 4.0 1990. showing fault code fuel 14, fail 14. what does this code mean ?


2 airflow sensor out of operating range 3 coolant temp sensor out of operating range 4 oxy sensor indicates full rich 5 throttle potentiometer/airflow sensor... (low throttle pot signal with high airflow sensor signal) 6 throttle pot/airflow sensor...... (high throttle pot signal with low airflow sensor signal) 7 throttle pot...idle fuel adjustment failure(idle speed??) 8 intake air temp sensor...open or shorted circuit to sensor 11 Throttle pot at idle: Throttle pot idle trim out of normal range 12 Airflow meter: MAF signal out of range 14 Coolant thermistor: Resistance out of range or static during engine warm up 16 Air thermistor: Resistance out of range 17 Throttle pot: Out of range 18 Throttle pot/Airflow: Low throttle pot signal at high airflow 19 Throttle pot/Airflow: High throttle pot signal at low airflow 22 Fuel pump drive: ECU output to fuel pump relay 23 Fuel supply: Engine running too rich 24 Ignition Drive: ECU output to ignition Amp 26 Air leak: Engine running too lean 29 ECU self check 33 Injector Drive: ECU output to injectors 34 Injector: Looks for Injector dribble 37 EGR Drive: ECU output to EGR switching valve 39 EGR check sensor: EGR not working (normally pipe blocked) 44 Lambda (O2) sensor: Poor mixture control rich or weak (or misfire) 46 Idle speed Control valve: ECU output to Coil AB 47 Idle speed Control valve: ECU output to Coil CD 48 Idle Speed Control Valve: Stepper motor grossly out of position 66 Air pump: ECU output to air pump relay 68 Road speed sensor: Seen speed < 5km/h at high engine airflow 69 Drive/Neutral switch: Seen cranking in "D" or high airflow in "N" 89 Purge Valve drive: ECU output to purge valve
this is all I could find

Nov 09, 2009 | 1990 Jaguar XJ6

1 Answer

I need all the engine diagnostic codes for a 94 plymouth sundance


11 Timing belt2.gif 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/ECM 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 failur

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1 Answer

My 1995 neon has ~105K miles, just passed emmissions with flying colors 1 week ago, and the ''check engine light'' came on. I have checked oil, coolant, brake juice, fan belt and air conditioner belt. Car...


the light has nothing to do with oil or coolant levels. it comes on for one of the following reasons. You will need to have the system computer memory tested to see which fault the system has.
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

Jun 11, 2009 | 1995 Dodge Neon

1 Answer

Codes 21 & 24


HI
the (ECT)coolant temp sensor have two wire and you can test it by (AVO meter) the two wire :-
the 1st is ground from ECM
the 2nd is have 5 volt whine disconnect the connector
of (ECT) and less then whine connected the (ECT)
the (ECT)was electronic thermo resistor
the one wire sensor work to coolant temp gage in dashboard

the (VSS) locate in trans axle it was electromagnetic sensor send signal to determine the distance in (KILOMETER)

with my best wishes

Jul 03, 2008 | Hyundai Motor 1991 Scoupe

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