Scooby Nooby, ECU error codes HELP!!! - Subaru WRX Forum
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post #1 of 2 Old 02-09-2012, 03:24 PM Thread Starter
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Location: Alabama
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Scooby Nooby, ECU error codes HELP!!!

Hi, my WRX is playing up, running rough, not starting when cold, fans coming on when cold, and reving itself irratically. I had read that you could connect the black connectors together under the dash and the Check Engine Light would flash in long and short pauses and you could accertain what the fault was. The problem I had was I couldn't tell what the codes were or if it was repeating the codes or if there were lots of them???? HELP!
So I filmed it and here is said film -->

Can anyone work out the codes? or has anyone had this before?
Many thanks for the time you spend looking at this thread.


Ps its a JDM 1994 WRX Wagon.

Last edited by outlaw-ridez; 02-09-2012 at 03:34 PM. Reason: Youtube url broken
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post #2 of 2 Old 02-09-2012, 06:49 PM
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Check Engine Light Illuminates

This won't be caused by the upgrade but is a handy check if you have a sensor failure. Follow the procedure detailed below:

Turn ignition OFF.

Connect black connectors under steering column.

Turn ignition ON (Engine OFF).

Engine Check lamp turns on.

Any codes are indicated by a flashing lamp.

If Code is OK then Turn ignition OFF & Disconnect Connectors.

Turn ignition OFF & Disconnect Connectors.

If there is a fault code check in the table below to see which sensor the code pertains to:

Reading the code: The long pulses (1.3 Seconds) indicate Tens and the short pulses (0.2 Seconds) indicate ones. Pulses are separated by Short Pauses (0.2 Seconds), multiple codes are separated by a Long Pause (1.8 Seconds). The codes are cycled.

11 Crankshaft position sensor

12 Starter switch

13 Camshaft position sensor

21 Engine coolant temperature sensor

22 Knock sensor

23 Mass air flow sensor

24 Idle air control solenoid

31 Throttle position sensor

32 Oxygen sensor

33 Vehicle speed sensor

35 Purge control solenoid valve

42 Idle switch

44 Wastegate control solenoid valve

45 Pressure sensor

51 Neutral position switch

Found this here. Frequently Asked Questions Hope it helps you out.

Cobb Accessport Stage 2.
JDM ej205 swap.

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