Saturn >> S-Series 1.9L (1992 – 1995)

Model Year Engine identification System
S-Series  1.9L 1992-95 VIN  position 8 =  7/9/8 GM

General information

  • Malfunction indicator lamp (MIL) will illuminate if certain faults are recorded .
  • ECM operates in backup mode if sensors fail, to enable vehicle to be driven to repair shop.
  • Trouble codes can be displayed by the MIL or by using a Scan Tool connected to the data link connector (DLC).

Accessing

Models with data link connector (OLe) terminal B connected

  • Access data link connector (DLC).
  • Jump data link connector (DLC) terminals A and B 1.
  • Switch ignition ON . Do NOT start engine.
  • Count MIL flashes. Note trouble codes. Compare with trouble code table.
  • Firstly trouble code 12 will be displayed 3 times.
  • Trouble codes consist of 2 groups, displayed as follows:
o First group indicates the ‘tens’ of the trouble code 2 [A] .
o Second group indicates the ‘units’ of the trouble code 2 [C].
o A short pause separates each group 2 [B].
o A long pause separates each trouble code 2 [D].
o For example: Trouble code 12 displayed 2. Start of diagnosis.
• Each additional trouble code will now be displayed 3 times, in ascending order.
NOTE: If no additional trouble codes are stored, code 12 will continue to be displayed.
• Trouble codes can also be displayed by using a Scan Tool connected to the data link connector (DLC) 1.

Models without data link connector (OLe) terminal B connected

• Trouble codes can only be displayed by using a Scan Tool connected to the data link connector (DLC).

Erasing

NOTE: Disconnecting battery ground lead may cause driveability problems until the engine management system relearns basic values.
  • Ensure ignition switched OFF.
  • Disconnect battery ground cable for 30 seconds.
  • Reconnect battery ground cable.
  • Repeat checking procedure to ensure no trouble codes remain in ECM fault memory.
NOTE: Disconnecting battery ground lead may also erase memory from electronic units, such as radio.
• Trouble codes can also be erased by using a Scan Tool connected to the data link connector (DLC) 1

Trouble code  identification

Flash code Fault location Probable cause
11 Transaxle trouble code logged Check transaxle
12 Start of diagnosis No engine speed (RPM) signal received
13 Oxygen sensor (02S)/heated oxygen sensor (H02S) Wiring open circuit, 02S/H02S, ECM
14 Engine coolant temperature (ECT) sensorvoltage low Wiring, ECT sensor, ECM
15 Engine coolant temperature (ECT) sensorvoltage high Wiring open circuit, ECT sensor, ECM
16 System voltage high/low Wiring, battery, alternator
19 Crankshaft position (CKP) sensor, 6X signal -circuit malfunction Wiring, CKP sensor, ECM
21 Throttle position (TP) sensor -voltage high Wiring, TP sensor, ECM
22 Throttle position (TP) sensor -voltage low Wiring open circuit/short circuit to ground, TP sensor, ECM
23 Intake air temperature (IAT) sensor -voltage high Wiring, IAT sensor, ECM
24 Vehicle speed sensor (VSS) -‘-no signal Wiring, VSS, ECM
25 Intake air temperature (IAT) sensor -voltage low Wiring short circuit to ground, IAT sensor, ECM
26 Engine control module (ECM), quad driver! output driver -circuit malfunction Wiring, ECM controlled components, ECM 0
27 Engine control module (ECM), quad driver! output driver -circuit malfunction Wiring, ECM controlled components, ECM 0
32 Exhaust gas recirculation (EGR) solenoid Wiring, poor connections, EGR valve, ECM
33 Manifold absolute pressure (MAP) sensor voltage highllow Wiring, hose blockedlleaking, MAP sensor, ECM
34 Manifold absolute pressure (MAP) sensor voltage low Wiring open circuit/short circuit to ground, MAP sensor, ECM
35 Idle air control (lAC) valve Wiring, lAC valve, intake system leaking, fuel system, PCV valve, AlC system, mechanical fault, ECM
41 Ignition control, bypass signal -circuit malfunction Wiring, poor connections, ICM, ECM
42 Ignition control, timing signal -circuit malfunction Wiring, poor connections, ICM, ECM
43 Knock sensor (KS) -circuit malfunction Wiring, KS, ECM
44 Oxygen sensor (02S)!heated oxygen sensor (H02S) -mixture lean Wiring open circuit/short circuit to ground,injector(s) blocked, fuel contamination, fuel pressure low, exhaust system leaking, 02S!H02S, ECM
48 Ignition control system, reference signal -circuit malfunction Wiring, ICM, ECM
49 Idle air control (lAC) valve -malfunction Wiring, lAC valve, intake system leaking, fuel system, PCV valve, AlC system, ECM
51 Engine control module (ECM), PROM -malfunction Poor connections, incorrect programming, ECM
52 System voltage highllow Wiring, alternator, battery
53 Knock sensor (KS), knock present -unable to rectify Wiring, mechanical fault, ECM
54 Engine control module (ECM), sensor supply voltage -circuit malfunction Wiring, poor connections, ECM
55 Engine control module (ECM) -malfunction Engine control module (ECM)
58 System voltage -sharp voltage changes Wiring, alternator
61 Ignition control system, 6X signal -circuit malfunction Wiring, ICM, ECM
63 Cruise control system -performance low Wiring, poor connections, accelerator cable sticking
67 Steering wheel position sensor -voltage high! low Wiring, poor connections, steering wheel position sensor
71 Engine coolant temperature (ECT) sensor voltage low Wiring, ECT sensor, ECM
72 Engine coolant temperature (ECT) sensorvoltage high Wiring open circuit, ECT sensor, ECM
73 Engine coolant temperature (EeT) sensor sharp voltage changes Wiring, ECT sensor, ECM
74 Engine coolant temperature to transmission fluid temperature -signal variation Wiring, ECT sensor, TFT sensor, ECM
75 Intake air temperature (JAT) sensor sharp voltage changes Wiring, JAT sensor, ECM
76 Throttle position to manifold absolute pressure -signal variation Wiring, TP sensor, MAP sensor, ECM
83 Engine coolant ‘low’ warning lamp switch Coolant level low, wiring, engine coolant ‘low’warning lamp switch
84 Engine control module (ECM) to transmission control module (TCM) -communication malfunction Poor connections, incorrect programming, ECM