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KA24DE Diagnostic Trouble Codes

Code
Detected Items
Malfunction is detected when ...
Check Items (Possible Cause)

11
Camshaft position sensor circuit
- Either 1 degree or 180 degrees signal is not detected by the EDM for the first few seconds during the engine cranking- Either 1 degree or 180 degrees signal is not detected by the ECM often enough while the engine speed is higher than the specified rpm
- The relation between 1 degree and 180 degree signals is not in the normal range during the specified rpm
- Harness or connectors (The sensor circuit is open or shorted.)
- Camshaft position sensor
- Starer motor
- Starting system circuit (EL selection)- Dead (Weak) battery

12
Mass air flow sensor circuit
- An excessively high or low voltage is entered to ECM
- Voltage sent to ECM is not practical when compared with the camshaft position sensor signal and throttle position sensor signals.
- Harness or connectors (The sensor circuit is opened or shorted.)
- Mass air flow sensor

13
Engine coolant temperature sensor circuit
- An excessively high or low voltage from the sensor is detected by the ECM
- Harness or connectors (The sensor circuit is opened or shorted.)
- Engine coolant temperature sensor

14
Vehicle speed sensor circuit
- The almost 0 MPH signal from the sensor is detected by the ECM even when vehicle is driving
-Harness or connectors (The sensor circuit is open or shorted.)
- Vehicle speed sensor

21
Ignition signal circuit
-The ignition signal in the primary circuit is not detected by the ECM during engine cranking or running.
-Harness or connectors (The ignition primary circuit is open or shorted.)
- Power transistor unit- Camshaft position sensor
- Camshaft position sensor circuit

25
Idle speed control function
-The idle speed control function does not operate properly.
- Harness or connectors (The valve circuit it shorted.)
- IACV
-AAC valve
- Harness or connectors (The valve circuit is open.)

28
Cooling fan circuit
- Cooling fan does not operate properly. (Overheat)
- Cooling system does not operate properly. (Overheat)
- Engine coolant was not added to the system using the proper filling method.
- Harness or connectors. (The cooling fan circuit is open or shorted.)
- Cooling fan
- Radiator hose
- Radiator
- Radiator cap
- Water pump
- Thermostat

31
ECM
- ECM calculation function is malfunctioning
- ECM (ECCS control module)

32
- EGR function
- The EGR flow is excessively low or high during the specified driveing condition.
- EGR valve stuck closed, open, or leaking- Passage obstructed
- EGR and canister control solenoid valve
- Tube leaking for EGR valve vacuum
- EGRC-BPT valve leaking

33
Front ocygen sensor circuit
- An excessively high voltage from the sensor is detected by the ECM
- The voltage from the sensor is constantly approx. 0.3V.
- The specified maximum and minimum voltages from the sensor are not reached.
- It takes more than the specified time for the sensor to respond between rich and lean.
- Harness or connectors (The sensor circuit is open or shorted.)
- Front oxygen sensor- Injectors
- Intake air leaks- Fuel pressure

34
Knock sensor circuit
- An excessively low or high voltage from the sensor is detected by the ECM.
- Harness or connectors (The sensor circuit is open or shorted.)
- Knock Sensor

35
EGR temperature sensor circuit
- An excessively low or high voltage from the sensor is defected by the ECM, evn when engine coolant temperature is low or high.
- Harness or connectors (The sensor circuit is open or shorted.)
- EGR temperature sensor

36
EGRC-BPT valve function
- EGRC-BPT valve does not operate properly
- EGRC-BPT valve- Rubber tube (obstructed or misconnected)

37
Closed loop control
- The closed loop control function does not operate even when vehicle is driving in the specified condition.
- The front oxygen sensor circuit is open or shorted.- Front oxygen sensor

41
Intake air temperature sensor circuit
- An excessively low or high voltage from the sensor is detected by the ECM.
- Voltage sent to ECM is not practical when compared with the engine coolant temerature sensor signal.
- Harness or connectors (The sensor circuit is open or shorted)
- Intake air temperature sensor

43
Throttle position sensor circuit
- An excessively low or high voltage from the sensor is detected by the ECM.
- Voltage sent to ECM is not practical when compared with the mass air flow sensor and camshaft position sensor signals.
- Harness or connectors (The sensor circuit is open or shorted.)
- Throttle position sensor

55
No failure
- No malfunction related to OBD system is detected by either ECM or A/T control unit.
- No failure

65
No. 4 cylinder misfire
- (Three-way catalyst damage) The misfire occurs, which will damage three way catalyst by overheating.
- (Exhaust quality deterioration) The misfire occurs, which will not damage three way catalyst but will affect emission deterioration.
- Improper spark plug
- The ignition secondary circuit is open or shorted.
- Insufficient compression
- Incorrect fuel pressure
- EGR valve
- The injector circuit is open or shorted.
- Injectors
- Lack of fuel
- Magnetized flywheel (drive plate)

66
No. 3 cylinder misfire
see above
see above

67
No. 2 cylinder misfire
see above
see above

68
No. 1 cylinder misfire
see above
see above

71
Multiple cylinder misfire
see above
see above

72
Three way catalyst function
- Three way catalyst does not operate properly.
- Three way catalyst does not have enogh oxygen storage capacity.
- Three way catalyst
- Exhaust tube
- Intake air leak
- Injectors- Injector Leak

76
Fuel injection system function
- Fuel injection system does not operate properly.
- The amount of mixture ratio compensation is excessive (The mixture ratio is too lean or too rich.)
- Intake air leak
- Front oxygen sensor
- Injectors
- Exhaust gas leak
- Incorrect fuel pressure
- Mass air flor sensor
- Lack of fuel

77
Rear heated oxygen sensor circuit
- An excessively high voltage from the sensor is detected by the ECM.
- The specified maximum and minimum voltages from the sensor are not reached.
- It takes more than the specified time for the sensor to respond between rich and lean
- Harness or connectors (The sensor circuit is open or shorted.)
- Rear heated oxygen sensor
- Fuel pressure
- Injectors
- Intake air leaks

82
Crankshaft position sensor (OBD) circuit
- The proper pulse signal from the sensor is not detected by the ECM while the engine is running at the specified rpm.
- Harness or connectors (The sensor circuit is open or shorted.)
- Rear heated oxygen sensor
- Fuel pressure
- Injectors
- Intake air leaks

84
A/T diagnosis communication line
- An incorrect signal from A/T control unit is detected by the ECM.
- Harness or connectors (The communication line circuit is open or shorted.
- Dead (Weak) battery
- A/T control unit

95
Crankshaft position sensor (OBD)
- The chipping of the flywheel or drive plate gear tooth is detected by the ECM
- Harness or connectors
- Crankshaft position sensor (OBD)
- Flywheel

98
Engine coolant temperature sensor function
- Voltage sent to ECM from the sensor is not practical, even when some time has passed after starting the engine
- Engine coolant temperature is insufficient for closed loop fuel control
- Harness or connectors (The swith circuit is open or shorted)
- Neutral position switch
- Inhibitor switch

103
Park/Neutral position switch circuit
- The signal of the park/neutral position switch is not changed in the process of engine starting and driving.
- Harness or connectors (The valve circuit is open or shorted)
- EGR and canister control solenoid valve

-
Signal circuit from A/T control unit to ECM
- ECM recieves incorrect voltage from A/T control unit continuously
- Harness or connectors (The circuit between ECM and A/T control unit is open or shorted)

111
Inhibitor switch circuit
-A/T control unit does not recieve the correct voltage signal from the switch based on the gear position.
- Harness or connectors (The switch circuit is open or shorted)
- Inhibitor switch

112
Revolution sensor
- A/T control unit does not recieve the proper voltage signal from the sensor
- Harness or connectors (The switch circuit is open or shorted)
- Revolution sensor

113
Improper shifting to 1st gear position
- A/T can not be shifted to the 1st gear position even electrical circuit is good
- Shift solenoid valve A
- Shift solenoid valve B
- Overrun clutch solenoid valve
- Line pressure solenoid valve
- Each clutch
- Hydraulic control circuit

114
Improper shifting to 2nd gear position
- A/T can not be shifted to the 2nd gear position even electrical circuit is good
see above

115
Improper shifting to 3rd gear position
- A/T can not be shifted to the 3rd gear position even electrical circuit is good
see above

116
Improper shifting to 4th gear position or TCC
- A/T can not be shifted to the 4th gear position or perform lock-up even electrical circuit is good
T/C clutch solenoid valve

118
Shift solenoid valve A
- A/T control unit detects the improprt voltage drop when it tries to operate the solenoid valve
- Harness or connectors (The switch circuit is open or shorted)

121
Shift solenoid valve B
- A/T control unit detects the improprt voltage drop when it tries to operate the solenoid valve
- Harness or connectors (The switch circuit is open or shorted)
- Shift solenoid valve A

123
Overrun clutch solenoid valve
- A/T control unit detects the improprt voltage drop when it tries to operate the solenoid valve
- Harness or connectors (The switch circuit is open or shorted)
- Shift solenoid valve B
- Overrun clutch solenoid valve

124
T/C clutch solenoid valve
- A/T control unit detects the improprt voltage drop when it tries to operate the solenoid valve
- Harness or connectors (The switch circuit is open or shorted)
- T/C clutch solenoid valve

125
Line pressure solenoid valve
- A/T control unit detects the improprt voltage drop when it tries to operate the solenoid valve
- Harness or connectors (The switch circuit is open or shorted)
- Line pressure solenoid valve

126
Throttle position sensor
- A/T control unit recieves an excessively low or high voltage signal from the sensor
- Harness or connectors (The switch circuit is open or shorted)
- Throttle position sensor

127
Engine speed signal
- A/T control unit does not recieve the proper voltage signal from the ECM
- Harness or connectors (The switch circuit is open or shorted)

128
Fluid temperature sensor
- A/T control unit recieves an excessively low or high voltage signal from the sensor
- Harness or connectors (The switch circuit is open or shorted)
- Fluid temperature sensor

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