ECU code 55????? Help

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jasonkg
Posts: 113
Joined: Wed Jul 13, 2005 11:54 am
Car: 1991 240sx
Location: Melbourne, Fl

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I am receiving a code 55 on my ECU. Has anyone ever had this code before and what was the cause after you had it diagnosed?

I am not sure if it has something to do with my car sputtering under boost.

Thanks

As you can see, I did some homework prior to posting.

There are two digits in each code. Count the long flashes, then the short flashes (only count how many times the light is ON) and you'll have a 2 digit code. These codes are covered in the service manual.

Code Meaning 11 - Camshaft Position Sensor 12 - Air Flow Meter 13 - Coolant Temperature Sensor 14 - Vehicle Speed Sensor 21 - Ignition Signal 25 - IACV - AAC Valve 26 - Boost Pressure Sensor 31 - ECM Fault 32 - Exhaust Gas Recirculation System 33 - Front EGO Sensor (O2-1 Sensor) 34 - Knock Sensor 35 - EGR Temperature Sensor 36 - EGR BPT Valve 37 - Closed Loop System 41 - Intake Air Temperature Sensor 43 - Throttle Position Sensor 54 - Signal from Auto Transmission 55 - Other Malfunction. CONSULT Terminal Required 63 - Cylinder 6 Misfire (?) 64 - Cylinder 5 Misfire (?) 65 - Cylinder 4 Misfire 66 - Cylinder 3 Misfire 67 - Cylinder 2 Misfire 68 - Cylinder 1 Misfire 71 - Random Misfire 72 - TW Catalyst System 76 - Fuel Injection System 77 - Rear EGO Sensor (O2-2) 82 - Crank Position Sensor 84 - Automatic Transmission Diagnostic Comms Line 95 - Crank Position Cog 98 - Coolant Temperature Sensor 103 - Park/Neutral Switch 105 - EGR Solenoid 111 - Inhibitor Switch 112 - Automatic Transmission Speed Sensor 113 - Automatic Transmission 1st Signal 114 - Automatic Transmission 2nd Signal 115 - Automatic Transmission 3rd Signal 116 - Automatic Transmission 4th Signal 118 - Automatic Transmission Shift Solenoid Valve A 121 - Automatic Transmission Shift Solenoid Valve B 123 - Automatic Transmission Overrun Clutch Solenoid Valve 124 - Automatic Transmission TOR Conv Solenoid Valve 125 - Automatic Transmission Line Pressure Solenoid 126 - Automatic Transmission Throttle Position Sensor 127 - Automatic Transmission Engine Speed Signal 128 - Automatic Transmission Fluid Temperature Sensor


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boost_creep
Posts: 838
Joined: Sat Jul 31, 2004 10:45 am
Car: 92 sr powered coupe,06 Spec V

Post

i asked this question about 2 years ago,and was told that 55 means everything is ok.i guess the ecu has to flash something so they made 55 a good to go signal.thats what i was told.

jasonkg
Posts: 113
Joined: Wed Jul 13, 2005 11:54 am
Car: 1991 240sx
Location: Melbourne, Fl

Post

Yeah I have read that to. I read this information and was under the impression that I would have to get the dealer or a shop to check it out. Were you having problems at that time?

User avatar
boost_creep
Posts: 838
Joined: Sat Jul 31, 2004 10:45 am
Car: 92 sr powered coupe,06 Spec V

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well...no,but i thought i was losing power,thats why i checked the code.i did find a small bnoost leak,but i think it was just mostly in my head.i guess i fell i always need to be doin something on my car..lol. you should be fine though,how is the car running?

jasonkg
Posts: 113
Joined: Wed Jul 13, 2005 11:54 am
Car: 1991 240sx
Location: Melbourne, Fl

Post

Its sputtering under boost pretty bad.

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S13FASTBACKSR
Posts: 2177
Joined: Sun Nov 27, 2005 10:28 am
Car: '92 Fastback SR powered

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have you been driving the car or letting it sit? a code is stored once the car has been driven for a little bit..if you have been driving it and you are getting a code 55 but yet you are sputtering under boost then i would check for boost leaks


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