check engine light
08 July 2010, 08:55 PM
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check engine light
Evening all, dont now know if im being too cautious, but on way home from work check engine light came on for about 4 seconds then went out. car is running fine and cant see any leaks etc. Has this happened to anyone else??? 
08 July 2010, 09:03 PM
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a code will be stored in the ECU and the fault logged, get it to a man with a box of tricks who can read the codes for you and take his advise on where to go next.
The bloke will plug in and take less than a minute to tell you what the code is. Most places will do it for free
The bloke will plug in and take less than a minute to tell you what the code is. Most places will do it for free
08 July 2010, 10:08 PM
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Well he could do that on any model to be honest but he'll miss out on the advise of where to go next. They may well be able to fix it there and then or at least start the ball rolling in ordering the parts.
If he just checks it himself and comes back on here for further advise and confusion, a million different issues and fixes will be suggested and he'll STILL have to go to the garage in the end armed with said info from forum only to find out it was something completely different.
If he just checks it himself and comes back on here for further advise and confusion, a million different issues and fixes will be suggested and he'll STILL have to go to the garage in the end armed with said info from forum only to find out it was something completely different.
11 July 2010, 08:28 AM
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Hi all
found this extremely useful when I had similair issues with my classic impreza
One of the most useful functions on the Classic Impreza is the ECU Fault Code reading function.
If you are having engine running issues or have had the 'Check Engine Light' (CEL) come on whilst driving, you can use the following easy to follow info to see what the problem is.
Most of the time the fault code that you see will be the cause of the problem but some times the failure of certain systems/sensors will cause an extra, non related fault code to be stored that can be missleading, a good example of this is the 'Neutral Position' Switch in the gearbox if this fails it shows itself as a 'Cylinder Missfire' fault.
How to read your ECU Fault Codes.
Scoobypedia Link......How to read ECU Fault Codes (Scoobypedia)
http://www.scoobypedia.co.uk/index.p...odeDefinitions
If you look under the dash on the drivers side you should find a pair of BLACK (1 pin) connectors and a pair of GREEN (2 pin) connectors situated very close together.
The black (1 pin) connectors are for reading the ECU Fault codes, the green (2 pin) connectors are for a system self test function that runs the rad fans, fuel pump and the wastegate solenoid valve.
For reading the ECU Fault Codes we are only interested in the BLACK (1 pin) connectors, with the ignition 'OFF' connect the BLACK (1 pin) connectors together and turn the ignition to the 'ON' position (Dash lights on engine off), now look at the 'Check Engine Light' it should now be flashing.
How to read the flashing Check Engine Light
A steady even spaced flash = no stored faults.
A slow flash = x10
A fast flash =x1
So for example if you see 2 slow flashes and 6 fast flashes your fault code is '26', the function can show you multiple codes too so it is handy to have a notepad and pen handy to write the codes down as you read them, if there are multiple codes they will be shown in a looped sequence with a pause between codes ie (2 slow - 6 fast - PAUSE - 3 slow 4 fast - PAUSE) once the last code in the sequence has been flashed the sequence repeats so dont panic if you did not catch the code the first time round. It is worth watching the sequence for a few loops to ensure you have taken down the correct codes.
Once you have finnished reading the Fault Codes, simply turn off the ignition and disconnect the BLACK (1 pin) connectors.
What the ECU Fault Codes mean.
Scoobypedia Link.....List of Subaru Fault Codes (Scoobypedia)
Once you are happy with the codes you have read, compare them to the list below to see what the code/s mean.
1 Engine Speed Signal Circuit
11 Crankshaft Position Sensor
12 Starter Signal
13 Camshaft Position Sensor
14 Fuel Injector No. 1 (Legacy, Impreza, Justy, SVX)
15 Fuel Injector No. 2 (Legacy, Impreza, Justy, SVX)
16 Fuel Injector No. 3 (Legacy, Impreza, Justy, SVX)
17 Fuel Injector No. 4 (Legacy, Impreza, SVX)
18 Fuel Injector No. 5 (SVX)
19 Fuel Injector No. 6 (SVX)
21 Engine Coolant Temperature Sensor
22 Knock Sensor
23 Mass Air Flow Sensor Circuit
24 Idle Control System Malfunction
24 ISC Valve (Stick)
24 Open/Short in ISC Valve Circuit
26 Intake Air Temperature Sensor
27 ATF Temperature Sensor Circuit
28 Knock Sensor #2
29 Crankshaft Position Sensor 2
31 Throttle Position Sensor Circuit
32 A/F Sensor #1 System
32 A/F Sensor #2 System
32 Oxygen Sensor
33 Vehicle Speed Sensor
35 CPC System
36 Turbine Speed Signal
37 Rear O2 Sensor Circuit / A/F Sensor Circuit Malfunction
38 Torque Control Signal #1
38 Torque Control Signal #2
38 Torque Control Signal System
38 Torque Permission Signal
39 Traction Control System
41 Air/Fuel Adaptive Control
42 Idle Switch
43 Accelerator Pedal Switch
44 Turbocharging Pressure Control Signal
45 Pressure Sensor
46 Neutral or Parking Switch or Circuit
47 Fuel Injector
48 Lean Burn System
49 CO Resistor
51 Neutral Position Switch
52 Parking Brake Switch (Exc. Justy)
53 Antenna
53 Anti-Quick Operation Mode
53 Communication Error (Time Over)
53 EGI Control Module EEPROM
53 IMM Circuit Failure (Except Antenna Circuit)
53 IMM Control Module EEPROM
53 Key Communication Failure
53 Reference Code Incompatibility
53 Use of Unregistered Key
54 Air Intake System
55 EGR Valve Lift Sensor
56 EGR System
57 Canister Control System
58 Air Control System
61 Air Suction Control Solenoid Valve
62 Exhaust Manifold Valve Negative Pressure Control Solenoid
64 Relief Valve Control Solenoid Valve 1
64 Relief Valve Control Solenoid Valve 2
65 Differential Pressure Sensor
66 Twin Turbocharger System(H)
66 Twin Turbocharger System(S)
66 Twin Turbocharger System(T)
66 Two Stage Twin Turbocharger System
67 Exhaust Manifold Valve Positive Pressure Control Solenoid
68 Turbocharging Pressure Control Output Signal #2
71 Shift Solenoid Valve
72 Shift Solenoid #2 Circuit
73 Low Clutch Timing Solenoid Circuit
74 Brake Clutch Timing Solenoid Circuit Malfunction
75 Line Pressure Duty Solenoid Circuit
76 Brake Clutch Pressure Duty Solenoid Circuit Malfunction
77 Lock-Up Duty Solenoid Circuit
78 Tiptronic Solenoid System
79 Transfer Clutch Duty Solenoid Circuit
81 Torque Up Control Valve
85 Charger System Circuit Malfunction
86 CAN (Communication System)
87 Variable Induction Solenoid Valve Circuit Malfunction
88 Fuel Pump Circuit Malfunction
89 VVT Systems (L)
89 VVT Systems ®
91 TCS Relief Valve
92 Electrical Generation Control Signal Circuit Malfunction
93 Vehicle Speed Sensor #1 Circuit
94 Lateral G Sensor Signal Circuit Malfunction
found this extremely useful when I had similair issues with my classic impreza
One of the most useful functions on the Classic Impreza is the ECU Fault Code reading function.
If you are having engine running issues or have had the 'Check Engine Light' (CEL) come on whilst driving, you can use the following easy to follow info to see what the problem is.
Most of the time the fault code that you see will be the cause of the problem but some times the failure of certain systems/sensors will cause an extra, non related fault code to be stored that can be missleading, a good example of this is the 'Neutral Position' Switch in the gearbox if this fails it shows itself as a 'Cylinder Missfire' fault.
How to read your ECU Fault Codes.
Scoobypedia Link......How to read ECU Fault Codes (Scoobypedia)
http://www.scoobypedia.co.uk/index.p...odeDefinitions
If you look under the dash on the drivers side you should find a pair of BLACK (1 pin) connectors and a pair of GREEN (2 pin) connectors situated very close together.
The black (1 pin) connectors are for reading the ECU Fault codes, the green (2 pin) connectors are for a system self test function that runs the rad fans, fuel pump and the wastegate solenoid valve.
For reading the ECU Fault Codes we are only interested in the BLACK (1 pin) connectors, with the ignition 'OFF' connect the BLACK (1 pin) connectors together and turn the ignition to the 'ON' position (Dash lights on engine off), now look at the 'Check Engine Light' it should now be flashing.
How to read the flashing Check Engine Light
A steady even spaced flash = no stored faults.
A slow flash = x10
A fast flash =x1
So for example if you see 2 slow flashes and 6 fast flashes your fault code is '26', the function can show you multiple codes too so it is handy to have a notepad and pen handy to write the codes down as you read them, if there are multiple codes they will be shown in a looped sequence with a pause between codes ie (2 slow - 6 fast - PAUSE - 3 slow 4 fast - PAUSE) once the last code in the sequence has been flashed the sequence repeats so dont panic if you did not catch the code the first time round. It is worth watching the sequence for a few loops to ensure you have taken down the correct codes.
Once you have finnished reading the Fault Codes, simply turn off the ignition and disconnect the BLACK (1 pin) connectors.
What the ECU Fault Codes mean.
Scoobypedia Link.....List of Subaru Fault Codes (Scoobypedia)
Once you are happy with the codes you have read, compare them to the list below to see what the code/s mean.
1 Engine Speed Signal Circuit
11 Crankshaft Position Sensor
12 Starter Signal
13 Camshaft Position Sensor
14 Fuel Injector No. 1 (Legacy, Impreza, Justy, SVX)
15 Fuel Injector No. 2 (Legacy, Impreza, Justy, SVX)
16 Fuel Injector No. 3 (Legacy, Impreza, Justy, SVX)
17 Fuel Injector No. 4 (Legacy, Impreza, SVX)
18 Fuel Injector No. 5 (SVX)
19 Fuel Injector No. 6 (SVX)
21 Engine Coolant Temperature Sensor
22 Knock Sensor
23 Mass Air Flow Sensor Circuit
24 Idle Control System Malfunction
24 ISC Valve (Stick)
24 Open/Short in ISC Valve Circuit
26 Intake Air Temperature Sensor
27 ATF Temperature Sensor Circuit
28 Knock Sensor #2
29 Crankshaft Position Sensor 2
31 Throttle Position Sensor Circuit
32 A/F Sensor #1 System
32 A/F Sensor #2 System
32 Oxygen Sensor
33 Vehicle Speed Sensor
35 CPC System
36 Turbine Speed Signal
37 Rear O2 Sensor Circuit / A/F Sensor Circuit Malfunction
38 Torque Control Signal #1
38 Torque Control Signal #2
38 Torque Control Signal System
38 Torque Permission Signal
39 Traction Control System
41 Air/Fuel Adaptive Control
42 Idle Switch
43 Accelerator Pedal Switch
44 Turbocharging Pressure Control Signal
45 Pressure Sensor
46 Neutral or Parking Switch or Circuit
47 Fuel Injector
48 Lean Burn System
49 CO Resistor
51 Neutral Position Switch
52 Parking Brake Switch (Exc. Justy)
53 Antenna
53 Anti-Quick Operation Mode
53 Communication Error (Time Over)
53 EGI Control Module EEPROM
53 IMM Circuit Failure (Except Antenna Circuit)
53 IMM Control Module EEPROM
53 Key Communication Failure
53 Reference Code Incompatibility
53 Use of Unregistered Key
54 Air Intake System
55 EGR Valve Lift Sensor
56 EGR System
57 Canister Control System
58 Air Control System
61 Air Suction Control Solenoid Valve
62 Exhaust Manifold Valve Negative Pressure Control Solenoid
64 Relief Valve Control Solenoid Valve 1
64 Relief Valve Control Solenoid Valve 2
65 Differential Pressure Sensor
66 Twin Turbocharger System(H)
66 Twin Turbocharger System(S)
66 Twin Turbocharger System(T)
66 Two Stage Twin Turbocharger System
67 Exhaust Manifold Valve Positive Pressure Control Solenoid
68 Turbocharging Pressure Control Output Signal #2
71 Shift Solenoid Valve
72 Shift Solenoid #2 Circuit
73 Low Clutch Timing Solenoid Circuit
74 Brake Clutch Timing Solenoid Circuit Malfunction
75 Line Pressure Duty Solenoid Circuit
76 Brake Clutch Pressure Duty Solenoid Circuit Malfunction
77 Lock-Up Duty Solenoid Circuit
78 Tiptronic Solenoid System
79 Transfer Clutch Duty Solenoid Circuit
81 Torque Up Control Valve
85 Charger System Circuit Malfunction
86 CAN (Communication System)
87 Variable Induction Solenoid Valve Circuit Malfunction
88 Fuel Pump Circuit Malfunction
89 VVT Systems (L)
89 VVT Systems ®
91 TCS Relief Valve
92 Electrical Generation Control Signal Circuit Malfunction
93 Vehicle Speed Sensor #1 Circuit
94 Lateral G Sensor Signal Circuit Malfunction
Last edited by mancscooby; 11 July 2010 at 08:30 AM. Reason: website link required
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