ECM- CODIGOS - ANTERIOR A 1995
MECANICA AUTOMOTRIZ

G.MOTORS
CHEVROLET-PONTIAC- BUICK- OLDSMOBILE, CADILLAC

ECM - CODIGOS DE DIAGNOSTICO  1995 Y ANTERIORES

 10.....Memory calibration error, or PCM Keep ALive RAM reset

11.....MIL lamp circuit, or EEPROM failure

12.....No timing/injector reference signal received by PCM while engine cranking

13.....Oxygen Sensor circuit (voltage stays between 0.35-5.5 volts) during closed loop, or left O2 sensor failure

14.....Coolant Temperature Sensor reading too high

15.....Coolant Temperature Sensor circuit reading too low

16.....Battery voltage out of range (too high or too low)

17.....Oxygen sensor voltage not changing (stays between 0.3 and 0.6 v), or left O2 sensor, or crankshaft position sensor

18.....Fuel injector driver circuit, or camshaft position sensor, or loop overrun

19.....Fuel pump circuit, or ignition control signal fault

20.....Fuel pump circuit

21.....Throttle Position Sensor (TPS) voltage too high or shorted

22.....Throttle Position Sensor (TPS) voltage too low or open

23.....Manifold Air Temperature (MAT) Sensor open or reading low, or Electronic Spark Timing (EST) bypass circuit, or feedback carburetor mixture control solenoid

24.....Vehicle Speed Sensor (VSS) circuit

25.....Manifold or Intake Air Temperature (MAT or IAT) sensor reading high, or bypass monitor Electronic Spark Timing enable

26.....Quad-driver module fault, or no throttle switch input

27.....Quad driver module #2 circuit fault, or open throttle switch

28.....Quad driver module #3 circuit fault, or 3/4 gear switch

29.....Secondary air injection pump circuit, or 3/4 gear switch

30.....Idle Speed Control circuit, or Throttle Position Sensor (TPS) reading out of range

31.....Manifold Absolute Pressure (MAP) sensor voltage high, or fuel injector malfunction, or P/N switch, or wastegate overboost

32.....Exhaust Gas Recirculation (EGR) problem, or Manifold Absolute Pressure (MAP) sensor voltage low

33.....Mass Airflow (MAF) Sensor circuit voltage high, or Manifold Absolute Pressure (MAP) sensor high

 34.....Mass Airflow (MAF) sensor circuit low, or Manifold Absolute Pressure (MAP) Sensor circuit low voltage

 35.....Idle Air Control (IAC) circuit, or short in throttle switch

36.....Transmission shift/solenoid, or improper timing signal

37..... Manifold Air Temperature (MAT) reading high or shorted

38.....Manifold Air Temperature (MAT) reading low or open

39.....Torque Converter Clutch (TCC) fault

40.....Power steering switch circuit, or O2 sensor voltage not changing

41.....Camshaft sensor circuit, or electronic spark timing (EST) circuit error

42.....Electronic Spark Timing (EST) bypass circuit (no change in signal), or left O2 sensor reading lean

 43.....Electronic Spark Control (ESC) bypass circuit, or Knock sensor open or grounded, or left O2 sensor reading rich

44.....Oxygen Sensor reads lean (low voltage of 0.2 or less), or left O2 sensor reading lean

45.....Oxygen Sensor reads rich (high voltage of 0.75 or more), or left O2 sensor reading rich

46.....PASS Key circuit, or fuel enable failure

47.....No Knock sensor signal, or ECM data link problem

48.....No mass airflow sensor (MAF) signal when engine on, or EGR not responding to off idle open command

 49.....AIR management system or vacuum leak

50.....Low ignition voltage (below 8.0 volts)

51.....Program Read Only Memory (PROM) or ECM error, or mixture control solenoid on feedback carburetor circuit

 52.....Fuel CALPAK missing, ECM has lost primary battery power, or engine oil temperature sensor circuit

 53.....No distributor reference pulses, or EGR solenoid circuit, or high battery voltage (over 17v), or Passkey circuit

54.....Carburetor mixture control solenoid, or idle speed control circuit, or fuel pump circuit

55...ECM fault, or Throttle Position Sensor misadjusted, or EGR #3 solenoid

56.....Bad coolant, or injector fault, or variable fuel sensor, or 3/4 gear switch/solenoid

57.....Boost control error, or 3-4 gear switch/solenoid, or transmission fluid too hot

58.....Anti-theft system, or transmission temperature too high

59.....Transmission Fluid temperature less than -31degrees F

60.....Transmission not in drive

61.....O2 sensor degraded, or cruise control vent solenoid

62.....Engine oil temperature too high, or cruise control vacuum solenoid

63...No change in right oxygen sensor signal, or cruise control servo

64...Right O2 sensor reading lean (low voltage below 0.2v), or cruise control system

65...Right O2 sensor reading rich (high voltage over 0.7v), or cruise control servo position sensor

66.....A/C pressure sensor circuit open or shorted, or cruise control circuit

67.....No change in A/C system pressure when clutch engages (low refrigerant or failed compressor), or cruise control

68.....A/C clutch relay circuit stuck on, or cruise control system

69.....A/C clutch relay stuck open or not working, or traction control remained active with cruise control on

 70.....A/C clutch relay circuit voltage out of range, or throttle position sensor signal intermittent

71.....A/C evaporator temperature sensor

72.....Intermittent coolant temperature reading, or erratic Manifold Absolute Pressure (MAP)sensor signal

73.....Coolant temperature sensor signal intermittent

74.....Intermittent Manifold Air Temperature (MAT), or oil temperature sensor

75...Ignition system voltage low, or air temperature sensor, or vehicle speed sensor circuit

76.....Manifold Absolute Pressure (MAP) out of range, or transmission fluid too hot

77.....Cooling fan relay #1 control circuit, or EGR #3 solenoid

78...Cooling fan relay #2 and #3 control circuits

79.....Transmission fluid temperature too hot

80.....Fuel system rich, or Throttle Position Sensor "Idle Learn" not complete after an EPROM reset

81.....Transmission 2-3 shift solenoid circuit

82.....Transmission 1-2 shift solenoid circuit

83.....Torque Converter Clutch PWM solenoid circuit, or Crankshaft position signal not received with cam pulses

84.....Transmission 3-2 shift solenoid circuit

85.....Torque converter Clutch solenoid stuck on, or "idle learned" throttle angle was more than 3.9 degrees

86.....Torque Converter Clutch Solenoid B stuck on, or transmission input and output speed did not agree

87.....Torque Converter Clutch Solenoid B stuck off

88.....ECM reset, or Torque converter clutch did not disengage when commanded OFF

89.....Transmission gear shift time too long

90.....Brake switch input circuit

91.....Park/Neutral switch circuit, or PRND321 indicator problem

92.....Heat windshield request

93.....Traction control system signals were not received by PCM

94.....Transmission gear selected did not match with the gear commanded

95.....Engine stall

96.....Torque Converter Clutch overstress (large throttle angle applied with transmission in gear and brakes on)

97.....Shift from P/N to Drive/Reverse at high throttle angle

98.....Shift from P/N to Drive/Reverse at high throttle angle, or Tach output voltage signal out of range

 99.....Cruise control servo

106.....Sudden vehicle deceleration without brake switch being activated

108.....Program Read Only Memory (PROM) error

109...PCM has lost primary battery power

110.....Generator remained OFF after being commanded ON

112...EPROM error. Replace PCM PROM

117.....Shift "A" or "B" solenoid output out of range

119.....Open or shorted fuel injector circuit

120.....A/C low side temperature sensor out of range

121.....A/C high side temperature sensor out of range

122.....A/C coolant temperature sensor out of range

123.....Low A/C refrigerant pressure

124.....A/C compressor circuit failed to engage

125.....A/C high pressure switch staying on

126.....A/C high pressure switch disabling A/C compressor clutch

128.....A/C disabled because of high refrigerant pressure

131.....No knock sensor signal.

132.....Knock sensor voltage out of range

133.....Loss of communication between PCM and ABS module

134.....Loss of communication between PCM and instrument panel cluster (PIC)

135.....Loss of communication between PCM and HVAC module

136.....Loss of communication between PCM and air bag diagnostic energy reserve module (DERM)

137.....Loss of ABS/traction control data

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