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My 1991 dode dakota is throwing code 23* Charge air tempature sensor circuit. How do i fix it?

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Check to make sure the intake temperature sensor, located in the intake tube near the mass air sensor, is connected and works, check with an ohm meter and see if it ohms out or if its an open circuit. if its open replace it. also check any wires and connectors for wear/corrosion.

Posted on Mar 28, 2011

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Can you tell me the location of code reader 1991 capri ?


1991 is pre-OBD2. code readers will not work.
sorry.
however, all is not lost. Many cars have an alternate way of reading codes from the computer.
Toyota has a block under the hood and you short couple wires together and count engine light flashes
Chrysler you can turn the ignition key on and off a few times and count engine light flashes
in your case for GMs from 1982 to 1995
1: find the 12 pin connector under the dash and short the upper two rightmost terminals.
with the ignition "ON" and engine not running. The system will enter the diagnostic mode. In this mode, the computer will display a Code 12, three consecutive times, by flashing the "CHECK ENGINE", "SERVICE ENGINE SOON" or "MALFUNCTION INDICATOR LAMP" or light. A Code 12 consists of one flash, a short pause, then two flashes in rapid succession.
2:. After Code 12 is displayed, any stored trouble codes will be displayed by flashing the "CHECK ENGINE", "SERVICE ENGINE SOON" or "MALFUNCTION INDICATOR LAMP" light. All codes are displayed 3 times each then a code 12 will repeat. In the diagnostic mode, the computer will also energize all computer controlled relays and solenoids.

Tech -- GM 2 Digit codes for 82 and up (non OBD-II)
code - code definition
12- diagnostic mode
13- 02 sensor or circuit
14- coolant sensor or circuit/ high temp indicated
15- coolant sensor or circuit/ low temp indicated
16- system voltage out of range
19- crankshaft position sensor or circuit
21- throttle position sensor or circuit- voltage high
22- throttle position sensor or circuit- voltage low
23- mixture control (m/c) solenoid or circuit (carbureted models)
23- manifold air temperature (mat) sensor or circuit (1990 and earlier models)
23- intake air temperature (iat) sensor circuit (fuel-injected models)
24- vehicle speed sensor (vss) or circuit
25- manifold air temperature (mat) sensor or circuit - high temperature indicated (1990 and earlier models)
25- intake air temperature (iat) sensor or circuit - high temperature indicated (1991 and later models)
26- quad driver module circuit
27- quad driver module circuit
28- quad driver module circuit
29- quad driver module circuit
31- park/neutral position (pnp) switch circuit
32- baro sensor or circuit (carbureted models)
32- egr circuit (fuel-injected models)
33- manifold absolute pressure (map sensor signal voltage high
33- mass air flow (maf) sensor or circuit - excessive airflow indicated
34- manifold absolute pressure (map) sensor signal voltage low 34- mass air flow (maf) sensor signal - low airflow indicated
35- idle speed control (isc) switch or circuit (shorted) (carbureted models)
35- idle air control (iac) valve/ circuit
38- brake switch circuit
39- torque converter clutch (tcc) circuit
41- no distributor signals to ecm, or faulty ignition module ( carbed models)
41- cylinders select error- mem-cal or ecm problem ( fuel-injected models
41- cam sensor circuit (3.8 engine)
42- bypass or electronic spark timing (est) circuit
43- low voltage at ecm terminal l (carbureted models)
43- knock sensor circuit
44- oxygen sensor or circuit - lean exhaust detected
45- oxygen sensor or circuit - rich exhaust detected
46- power steering pressure switch circuit
48- misfire diagnosis
51- prom, mem-cal or ecm problem
52- calpak or ecm problem
53- egr fault (carbureted models only)
53- system over-voltage (ecm over 17.7 volts)
54- mixture control (m/c) solenoid or circuit (carbureted models)
54- fuel pump circuit (1986 and later models)
55- oxygen sensor circuit or ecm
55- fuel lean monitor (2.2l engine)
61- oxygen sensor signal faulty (possible contaminated sensor)
62- transaxle gear switch signal circuits
63- manifold absolute pressure (map) sensor voltage high (low vacuum detected)
64- manifold absolute pressure (map) sensor voltage low (high vacuum detected)
66- pressure sensor or circuit air conditioning

May 20, 2014 | 2002 Subaru Forester

1 Answer

Hi i have 1990 buick lesabre limited and the service engine light is on and im getting 13 different codes i believe there a is a bad censor cause the rest of the codes but i dont know here are the codes...


First thing I would do is reset ALL the codes. Do you have your own code sensor OBD2? A soon as the check engine light comes on, pull over and shut off the car and then re-read the codes.
Let me know what you find.
Good Luck

Oct 27, 2013 | Cars & Trucks

1 Answer

Stuck in 3rd, throwing codes 21,22,23. Will manually shift into second. 93 gc with 4.0 42re transmission


Code 21 is "O2 Sensor shorted to voltage"
Code 22 is "Engine coolant temperature sensor voltage low"
Code 23 is "Air intake temperature sensor circuit out of range" (Voltage too high or voltage too low)

I would personally work the codes from the lowest to the highest number. Shorted oxygen sensor circuits have been known to wreak all kinds of havoc with the powertrain control module. It could be the oxygen sensor itself, but be sure to check the oxygen sensor wires to make sure they are not shorted against the exhaust manifold or engine/transmission assemblies.

Fix one thing at a time, then disconnect the battery to reset the computer and drive the vehicle for a while to see if the other codes come back and to see if this helps your shifting problems.

If the other codes return, then you must diagnose each circuit and repair as necessary and retest between each step.

Aug 25, 2011 | Jeep Grand Cherokee Cars & Trucks

1 Answer

What do i do for code 23


Nice Jeep, I have one '93 GC Limited 5.2L V8, monster engine!!!!

About your fault code, this 23 MAT sensor or circuit, and this appears when the air charge temperature sensor signal is out of range - that is, giving a voltage not expected by the computer programmers. The power limited light will come on and the computer will assume that the temperature from the sensor is 70° F. On turbo models, the air charge sensor is located on the intake manifold. On TBI models (fuel injected, no turbocharger) the sensor is referred to as the throttle body temperature sensor and is located on the throttle body.

Possible Reasons for Chrysler Computer Fault Code 23:
- Defective Air Charge Temperature Sensor - The sensor should measure 5,290 ohms to 5,610 ohms at 77 degrees for the 1984 model year. For later models, the measurement should be between 9,120 and 10,880 ohms at 77 degrees.
- Poor wiring or connection - Read the page 'How to troubleshoot drivability issues'. Check the wiring and connections between the sensor and the logic module. Check the harness from the sensor to the computer. Inspect every connector. Clean and re-grease the connectors with dielectric grease. When setting ignition timing it may be necessary to disconnect the sensor from the harness.

Hope helps (remmeber to comment and rate this)


Its possible that you are interesting in other infomation in this links:
- read_check_engine_codes
- yourself_ecu_reset_procedure

Feel free to shared this info

Sep 29, 2010 | 1995 Jeep Grand Cherokee

1 Answer

For sevice code 23 what do i do


Nice Jeep, I have one '93 GC Limited 5.2L V8, monster engine!!!!

About your fault code, this 23 MAT sensor or circuit, and this appears when the air charge temperature sensor signal is out of range - that is, giving a voltage not expected by the computer programmers. The power limited light will come on and the computer will assume that the temperature from the sensor is 70° F. On turbo models, the air charge sensor is located on the intake manifold. On TBI models (fuel injected, no turbocharger) the sensor is referred to as the throttle body temperature sensor and is located on the throttle body.

Possible Reasons for Chrysler Computer Fault Code 23:
- Defective Air Charge Temperature Sensor - The sensor should measure 5,290 ohms to 5,610 ohms at 77 degrees for the 1984 model year. For later models, the measurement should be between 9,120 and 10,880 ohms at 77 degrees.
- Poor wiring or connection - Read the page 'How to troubleshoot drivability issues'. Check the wiring and connections between the sensor and the logic module. Check the harness from the sensor to the computer. Inspect every connector. Clean and re-grease the connectors with dielectric grease. When setting ignition timing it may be necessary to disconnect the sensor from the harness.

Hope helps (remmeber to comment and rate this).

Sep 29, 2010 | 1995 Jeep Grand Cherokee

2 Answers

1991 olds cutlass calais 2.5 engine ran the self dignostics and got code 33 need to what code 33 is.


It's the maf/map sensor circuit.
maf--- mass air flow sensor
map--- manifold absolute pressure.--- check the small vaccum hose from the map sensor to the source, could be brittle and leaking air.
Have both the map and maf sensor checked for proper voltage, one or both could be bad. A repair shop shouldn't charge much to do that.

May 05, 2010 | 1991 Oldsmobile Cutlass Calais

2 Answers

Code p1784 is pressure switch circuit:LR How to


you'll need to have a transmission shop check the wiring harness in the transmission first ,then they can repair it,this is not a job to be doing yourself,

Jan 26, 2010 | 2000 Dodge Dakota Quad Cab

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