Flashing Check engine light
#1
Flashing Check engine light
HI,
Just had my heater matrix replaced in my 95 wrx saloon and when i got the car back the engine was ........ in big trouble. I could barely keep it running, and the check engine light was flashing.
IdeaS?
Thanks
Just had my heater matrix replaced in my 95 wrx saloon and when i got the car back the engine was ........ in big trouble. I could barely keep it running, and the check engine light was flashing.
IdeaS?
Thanks
#2
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You need to read the error code from the ecu, but worth resetting the ecu first..
ECU Reset and Error codes
Turn OFF the ignition
Connect Error code Connectors and Test Mode Connectors : 2 black connectors under dash, connect black to black and 2 green connectors under dash, connect green to green, they are by your left knee when sat in the drivers seat and often taped back to the loom if they haven't been used before.
Turn ON ignition but doesn't start the engine
Engine Check lamp comes on
Press accelerator pedal to the floor
Then return it to the half-throttle position and hold it there for two seconds
Release foot off the pedal completely
Start the engine
Check engine light error code is indicated by Pulsing lamp
If an error is detected then Check ECU Code
If no error is detected - drive the car sensible for a couple of minutes
i.e. until warm (do not use boost or high rpm!)
When the ECU has been reset the Check Engine Light will flash
An Error Code is indicated by a flashing check engine light of varying length of flash, a flash of around once a second is the okay code and indicates all is well.
If an error code is detected Check the ECU Code
Turn ignition OFF and Disconnect Connectors
If there is a fault Check the Appropriate Sensor
Error Codes
An Error code is defined as a slow flash followed by fast flash i.e 2 slow and 3 fast = 23 Mass Airflow sensor.
A continuous on/off at the same speed is no fault found.
Code Fault
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 2
35 Purge control solenoid valve
42 Idle switch
44 Wastegate control solenoid valve
45 Pressure sensor –Pressure exchange solenoid valve
51 Neutral position switch
Simon
ECU Reset and Error codes
Turn OFF the ignition
Connect Error code Connectors and Test Mode Connectors : 2 black connectors under dash, connect black to black and 2 green connectors under dash, connect green to green, they are by your left knee when sat in the drivers seat and often taped back to the loom if they haven't been used before.
Turn ON ignition but doesn't start the engine
Engine Check lamp comes on
Press accelerator pedal to the floor
Then return it to the half-throttle position and hold it there for two seconds
Release foot off the pedal completely
Start the engine
Check engine light error code is indicated by Pulsing lamp
If an error is detected then Check ECU Code
If no error is detected - drive the car sensible for a couple of minutes
i.e. until warm (do not use boost or high rpm!)
When the ECU has been reset the Check Engine Light will flash
An Error Code is indicated by a flashing check engine light of varying length of flash, a flash of around once a second is the okay code and indicates all is well.
If an error code is detected Check the ECU Code
Turn ignition OFF and Disconnect Connectors
If there is a fault Check the Appropriate Sensor
Error Codes
An Error code is defined as a slow flash followed by fast flash i.e 2 slow and 3 fast = 23 Mass Airflow sensor.
A continuous on/off at the same speed is no fault found.
Code Fault
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 2
35 Purge control solenoid valve
42 Idle switch
44 Wastegate control solenoid valve
45 Pressure sensor –Pressure exchange solenoid valve
51 Neutral position switch
Simon
#3
ok, so mine is continuous on/off. I haven't connected any wires yet ( although i have no idea whatthe garage did ) but the engineis still crappy. it cant seem to find the idle speed........ nearly cuts out wheni put my foot on accel.... then races.
Will removing the ECU and replacing also reset it?
Thanks
Will removing the ECU and replacing also reset it?
Thanks
#5
Scooby Regular
sounds like the garage have mistakenly plugged the "green" diagnostic plugs together after having the dash out to sort the matrix...................
under the drivers side just near the steering column............
alyn
under the drivers side just near the steering column............
alyn
#7
so the saga continues............
the garage have had my car for 7 weeks, and they cant fix it.
Anyway, NOW the check engine light is flashing 3 long and 3 short. From the previous post that look slike the speed sensor no. 2? Where is that? Any ideas? Actual perfomance is much better but ultuimately seems to lacking a bit of grunt in the higher rev range.
Thanks in advance
the garage have had my car for 7 weeks, and they cant fix it.
Anyway, NOW the check engine light is flashing 3 long and 3 short. From the previous post that look slike the speed sensor no. 2? Where is that? Any ideas? Actual perfomance is much better but ultuimately seems to lacking a bit of grunt in the higher rev range.
Thanks in advance
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