jasonkg

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

usdm180sx

Where is that list of codes from? I just got a code 55 as well but on this link it says all is well:

http://www.ka24development.com/ecu_codes.html

The list is a Probable 'trouble code' cause for Nissan vehicles 1984 and later

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-Norm!

mrmephistopheles

55 means everything is fine.

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mjjstang

yah I got a 55 back in the day and did a quick google search, came up just as meph said. I was pissed cuz car was running like shit, never did figure it out. but "everything was fine".

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I was going to, but I can not think of a sig less than 75 characters.

HalveBlue

A Code 55 means the ECU diagnostic mode does not detect any errors.

So, either everything is working correctly or the ECU isn't receiving any malfunction feedback from any of the sensors.

Lex Zarza

that's so strange mines says code: 55 as well even tho it not starting. plus my car has been sitting for about 5 months. i am still trying to solve the problem.

S14rebuild

Holy bumppppppppppp