Hey guys & Gals,

Using i-club.com as another resource for research, there wasnt that much on here as compared to NASIOC, rs25.com, iwsti.com, clubwrx.net, etc. etc. Ill see if I can get this a sticky..

Guys & Gals, you can add your Diagnosis & Resolution for each DTC CEL code you pulled. I know research helps us learn more about our subie's but for those who have their suby as their only source of trasnportaion, this could prove useful. Here we go and ill start first.


P1443: EVAP Emissions Vent Control Valve System Malfunction

My Diagnosis:

1. Plugged in the Green Test Connectors located under the dash which puts the engine in check mode and test's all relays, solenoids and Valves. (Listen for clicks and humming sounds to determine functionality of the mechanical device)

*All solenoids, and valves in my case where operable and receiving perfect voltage.

2. Hooked up the Vag Com cable with ECUexplorer running to get live feeds of relays, solenoids, and valves operating.

3. Took off the Charcoal Canister and emptied out alittle bit of loose charcoal pellets.

4. Blew 40 PSI of compressed air into the Fuel & Vent hoses to try unclog the clog(which didnt help).

5.Blew 90 PSI of compressed air into the drain hose and mud & road debris came shooting out like my car made diarrehea.

6. Drove the car for 10 miles and code didnt come back on.

P0442: EVAP Emission small leak detected or P0457 GAS CAP LOOSE.

My Diagnosis:

1. Checked the Gas cap and it was loose.

2. Retighten it and DTC CEL didnt come on after driving after 10 miles.

 

Cool. For the P1443, you mentioned you cleaned out the "drain hose" with compressed air. Just curious where this hose is or what it is connected to?

For the P0442, bah! you know better than to keep your gas cap loose! lol.

 

the drain hose is normally hooked up to the charcoal cannister...

from the purge valve/vent vale it opens up to the charcoal cannister then to atmosphere...most cars mount the charcoal cannister in the back by the tank...but i've seen them up front as well...

 

Ah, fresh air inlet.

icic.

 

P0031 Front oxygen (A/F) sensor heater circuit low input
P0032 Front oxygen (A/F) sensor heater circuit high input _
P0037 Rear oxygen sensor heater circuit malfunction
P0038 Rear oxygen sensor heater circuit high input
P0065 Air assist injector solenoid valve malfunction
P0066 Air assist injector solenoid valve circuit low input
P0067 Air assist injector solenoid valve circuit high input
P0101 Mass air flow sensor circuit range/performance problem (high input)
P0102 Mass air flow sensor circuit low input
P0103 Mass air flow sensor circuit high input
P0106 Pressure sensor circuit range/performance problem (low input)
P0107 Pressure sensor circuit low input
P0108 Pressure sensor circuit high input
P0111 Intake air temperature sensor circuit range/performance problem
P0112 Intake air temperature sensor circuit low input
P0113 Intake air temperature sensor circuit high input
P0117 Engine coolant temperature sensor circuit low input
P0118 Engine coolant temperature sensor circuit high input
P0121 Throttle position sensor circuit range/performance problem (high input)
P0122 Throttle position sensor circuit low input
P0123 Throttle position sensor circuit high input
P0125 Insufficient coolant temperature for closed loop fuel control
P0128 Thermostat malfunction
P0130 Front oxygen (A/F) sensor circuit range/performance problem (lean)
P0131 Front oxygen (A/F) sensor circuit range/performance problem (low input)
P0132 Front oxygen (A/F) sensor circuit range/performance problem (high input)
P0133 Front oxygen (A/F) sensor circuit slow response
P0136 Rear oxygen sensor circuit malfunction
P0139 Rear oxygen sensor circuit slow response
P0171 Fuel trim malfunction (A/F too lean)
P0172 Fuel trim malfunction (A/F too rich)
P0181 Fuel temperature sensor A circuit range/performance problem
P0182 Fuel temperature sensor A circuit low input
P0183 Fuel temperature sensor A circuit high input
P0244 Wastegate control solenoid valve malfunction (high input)
P0245 Wastegate control solenoid valve circuit low input
P0246 Wastegate control solenoid valve circuit high input
P0301 Cylinder 1 misfire detected
P0302 Cylinder 2 misfire detected
P0303 Cylinder 3 misfire detected
P0304 Cylinder 4 misfire detected
P0327 Knock sensor circuit low input
P0328 Knock sensor circuit high input
P0335 Crankshaft position sensor circuit malfunction
P0336 Crankshaft position sensor circuit range/performance problem
P0340 Camshaft position sensor circuit malfunction
P0341 Camshaft position sensor circuit range/performance problem
P0420 Catalyst system efficiency below threshold
P0442 Evaporative emission control system malfunction
P0444 Evaporative emission control system purge control valve circuit low input
P0445 Evaporative emission control system purge control valve circuit high input
P0447 Evaporative emission control system vent control low input
P0448 Evaporative emission control system vent control high input
P0451 Evaporative emission control system pressure sensor range/performance problem
P0452 Evaporative emission control system pressure sensor low input
P0453 Evaporative emission control system pressure sensor high input
P0456 Evaporative emission control system malfunction
P0457 Evaporative emission control system leak detected (fuel cap loose/off)
P0461 Fuel level sensor circuit range/performance problem
P0462 Fuel level sensor circuit low input
P0463 Fuel level sensor circuit high input
P0464 Fuel level sensor intermittent input
P0480 Cooling fan relay 1 circuit low input
P0483 Cooling fan function problem
P0500 Vehicle speed sensor malfunction
P0506 Idle control system RPM lower than expected
P0507 Idle control system RPM higher than expected
P0508 Idle control system circuit low input
P0509 Idle control system circuit high input
P0512 Starter switch circuit high input
P0545 Exhaust gas temperature sensor circuit low input
P0546 Exhaust gas temperature sensor circuit high input
P0604 Internal control module memory check sum error
P0703 Brake switch input malfunction
P0705 Transmission range sensor circuit malfunction
P0710 Transmission fluid temperature sensor circuit malfunction
P0715 Torque converter turbine speed sensor circuit malfunction
P0720 Output speed sensor (vehicle speed sensor 2) circuit malfunction
P0725 Engine speed input circuit malfunction
P0731 Gear 1 incorrect ratio
P0732 Gear 2 incorrect ratio
P0733 Gear 3 incorrect ratio
P0734 Gear 4 incorrect ratio
P0741 Torque converter clutch system malfunction
P0743 Torque converter clutch system (Lock-up duty solenoid) electrical
P0748 Pressure control solenoid (Line pressure duty solenoid) electrical
P0753 Shift solenoid A (Shift solenoid 1) electrical
P0758 Shift solenoid B (Shift solenoid 2) electrical
P0778 2-4 brake pressure control solenoid valve (2-4 brake duty solenoid) circuit malfunction
P0785 2-4 brake timing control solenoid valve (2-4 brake timing solenoid) circuit malfunction
P1086 Tumble generator valve #2 (LH) position sensor circuit low input
P1087 Tumble generator valve #2 (LH) position sensor circuit high input
P1088 Tumble generator valve #1 (RH) position sensor circuit low input
P1089 Tumble generator valve #1 (RH) position sensor circuit high input
P1090 Tumble generator valve #1 (RH) malfunction (stuck open)
P1091 Tumble generator valve #1 (RH) malfunction (stuck close)
P1092 Tumble generator valve #2 (LH) malfunction (stuck open)
P1093 Tumble generator valve #2 (LH) malfunction (stuck close)
P1094 Tumble generator valve circuit #1 (open circuit)
P1095 Tumble generator valve circuit #1 (over current)
P1096 Tumble generator valve circuit #2 (open circuit)
P1097 Tumble generator valve circuit #2 (over current)
P1110 Atmospheric pressure sensor low input
P1111 Atmospheric pressure sensor high input
P1112 Atmospheric pressure sensor range/performance problem
P1130 Front oxygen sensor circuit malfunction (open circuit)
P1131 Front oxygen sensor circuit malfunction (short circuit)
P1134 Front oxygen (A/F) sensor microcomputer problem
P1137 Front oxygen (A/F) sensor circuit range/performance problem
P1139 Front oxygen (A/F) sensor #1 heater circuit performance/range problem
P1141 Mass air flow sensor circuit range/performance problem (low input)
P1142 Throttle position sensor circuit range/performance problem (low input)
P1146 Pressure sensor circuit range/performance problem (high input)
P1230 Fuel pump control unit malfunction
P1244 Wastegate control solenoid valve malfunction (low input)
P1245 Wastegate control solenoid valve malfunction (fail-safe)
P1301 Fire due to increased exhaust temperature
P1312 Exhaust temperature sensor malfunction
P1400 Fuel tank pressure control solenoid valve circuit low input
P1420 Fuel tank pressure control solenoid valve circuit high input
P1443 Evaporative emission control system vent control function problem
P1480 Cooling fan relay 1 circuit high input
P1507 Idle control system malfunction (fail-safe)
P1510 Idle air control solenoid valve signal 1 circuit low input
P1511 Idle air control solenoid valve signal 1 circuit high input
P1512 Idle air control solenoid valve signal 2 circuit low input
P1513 Idle air control solenoid valve signal 2 circuit high input
P1514 Idle air control solenoid valve signal 3 circuit low input
P1515 Idle air control solenoid valve signal 3 circuit high input
P1516 Idle air control solenoid valve signal 4 circuit low input
P1517 Idle air control solenoid valve signal 4 circuit high input
P1518 Starter switch circuit low input
P1540 Vehicle speed sensor malfunction 2
P1544 High exhaust temperature detected
P1560 Back-up voltage circuit malfunction
P1590 Neutral position switch circuit high input
P1591 Neutral position switch circuit low input
P1592 Neutral position switch circuit (MT model)
P1594 Automatic transmission diagnosis input signal circuit malfunction
P1595 Automatic transmission diagnosis input signal circuit low input
P1596 Automatic transmission diagnosis input signal circuit high input
P1698 Engine torque control cut signal circuit low input
P1699 Engine torque control cut signal circuit high input
P1700 Throttle position sensor circuit malfunction for automatic transmission
P1701 Cruise control set signal circuit malfunction for automatic transmission
P1703 Low clutch timing control solenoid valve circuit malfunction
P1711 Engine torque control signal 1 circuit malfunction
P1712 Engine torque control signal 2 circuit malfunction

 

Lmfao, u cut and paste but if you noticed, its a cel and solution thread. damn if you went through all those codes. lol, So wats the solution to each?

 

The solution to all that at once would be giving them back the receipt amd keys for another. Easiest and fastest fix evar.

 

I know, but hopefully it helps. I hate always having to go to Nasioc to find it. I actually have a printed out version I keep in the car.
The best solution for all of those codes is to just disable your CEL light.

 

this may b e a dumb question, but here goes... how do you pull the codes, is it with the diagnostics tool? If so, and I don't have access to the tool, is there another way to pull the codes? Like with the old obd-0 hondas there was the led that blinked the code. Anything like that on the subarus? Please forgive me as this is the first time I have encountered a cel on an obd-2 vehicle.

 

-OBDII scanner
-tactrix cable w/Learning View Software
-Cobb AP V2


I think there are a few others that I missed

 

2005+ Legacys have this feature to find out what the code is using oem white plugs. Its in the manual, but not for WRXs and STIs though from what I know so far...