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How to read GT engine fault codes
Doing a GT blink test
Published by blu73
28-02-2019
Difficulty Level: 1

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Question How to read GT engine fault codes

You don't need anything fancy for this, your GT, its key and a short length of wire - thats it!

Procedure:
1: turn the ignition key to MAR, without starting the engine

2: find the 3 pin diagnostics port located at rear of engine bay under the plastic cover (see pic).
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3: Remove the cover (if its still there) and find the pin which has a blue/white wire. Stick one end of your little length of wire in the pin with the blue/white wire and stick the other end to earth for 4 seconds - the inlet manifold is a good bet for the earth as its right there next to the diagnostics port. This will start the readout process:

3- the ECU light should light for a long flash (~2 secs) followed by the blink code of the first fault (4 digits indicated by blinks separated by ~0.5sec then a longer pause ~1.0sec between digits then ~2 secs before the code is repeated)

4- I'm not 100% sure about this (only verified for GT2 & GT3 ECUs) earthing the blue/white lead again should cause the next code to be repeated in a loop. When all fault codes have been read out, the light will flash 1111, 4444 or, possibly 3333, this indicates end of codes. If you get either of them at the start then there is no stored codes.

5- turn ignition off, your done. Refer below for list of codes.


LIST OF CODES
1111 - No errors logged in the ECU, no malfunctions, or end-of-codes (long flashes GT2)

Out of Range Fault codes:
1211 - Battery voltage anomaly - voltage < 10 volts or > 16 volts
1214 - Coolant temperature sensor (CTS) - temp. either > 140°C or < -35°C
1216 - Throttle potentiometer sensor (TPS) - short or open circuit
1221 - Air flow meter (AFM) sensor - short or open circuit
1222 - Lamba probe - over or underfueling > 10 secs
1223 - Inner circuit lambda probe - over or underfueling / ECU
1224 - Lambda probe - lambda voltage < 0,09 V or > 1,1 V
1225 - Inlet air temp (IAT) sensor - > 140°C or < -35°C
1226 - Ignition module (coil pack)
1233 - Idle control valve (ICV) - final stage
1235 - Air conditioning compressor - IN signal
1236 - Air conditioning compressor - OUT signal
1244 - Carbon canister solenoid valve - short or open circuit / ECU
1251 - ECU defective - (RAM or EPROM)
1252 - Tachometer sensor signal
1255 - Phase sensor signal
1256 - RPM/crank sensor - N.B. for some ECUs, this may occur if the engine isn't running and may be ignored - so ignore if you have no running issue.
1257 - Top Dead Centre (TDC, RPM/crank) sensor signal - (Check the Air Gap before replacing)
1261 - Electroinjector cylinder 1 - short or open circuit
1262 - Electroinjector cylinder 2 - short or open circuit
1263 - Electroinjector cylinder 3 - short or open circuit
1264 - Electroinjector cylinder 4 - short or open circuit
1265 - Injection warning light malfunction - check the bulb

1311 - Electroinjector cylinder 1
1312 - Electroinjector cylinder 2
1313 - Electroinjector cylinder 3
1314 - Electroinjector cylinder 4


Actuator test codes (these are not fault codes)
You have entered the actuator tests.
Probably, you have earthed the blue-white cable before turning the ignition key to MAR.
1412 - Idle control valve (ICV) actuator
1413 - Carbon canister solenoid valve
1421 - Injector 1
1422 - Injector 2
1423 - Injector 3
1424 - Injector 4


Sensor Error Fault codes:
2111 - Knock sensor malfunction
2114 - Throttle potentiometer/postion sensor (TPS) - false contacts or bugs
2116 - Invalid test - repeat the operation
2121 - unknown - check for inlet manifold and ICV gasket leaks and vac. pipes
2124 - Phase sensor
2125 - Barometric pressure sensor

2131 - Either tachometer or RPM/crank sensor malfunction (GT2)? Possibly temperature related?
2133 - Not defined
2134 - Over-boost electrovalve (Pierburg valve/PBV) malfunction - short or open circuit
2135 - Manifold absolute pressure (MAP) sensor (internal to ECU)

3211 - Manifold absolute pressure (MAP) sensor malfunction (internal to ECU)
3232 - unknown - reported symptom, pressure in coolant system, possible oil pressure problem

3333 - Possibly the same as 4444 below (unconfirmed)

4444 - No errors logged in the ECU, no malfunctions, or end-of-codes (GT3)


Fault codes are kept in memory for some engine start-ups, then they are gradually removed. To reset the memory just unplug the ECU, or disconnect the battery for a few minutes.
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Old 28-02-2019   #1
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Re: How to read GT engine fault codes

Great.!!

I used a sweep needle volt meter on a 1992 ford.. same basic principle.

Do you think all FIATS have this?

Bravo - brava era.
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Re: How to read GT engine fault codes

Ah nice thanks useful info next time it's in the garage I'll get it checked the box in the centre of the engine right... funny enough I opened that the other day to check fuses and dropped the washer 😂 typical me lol
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Re: How to read GT engine fault codes

I swear I'm scared to get it diagnosed 😂 prob have half the faults on that list dam it
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Re: How to read GT engine fault codes

Out of interest what fault will come up if you remove the catylitic converter and just have a straight pipe
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Old 28-02-2019   #5
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Re: How to read GT engine fault codes

Quote Originally Posted by djechouk View Post
I swear I'm scared to get it diagnosed 😂 prob have half the faults on that list dam it
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Old 28-02-2019   #6
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Re: How to read GT engine fault codes

Quote Originally Posted by varesecrazy View Post
Great.!!

I used a sweep needle volt meter on a 1992 ford.. same basic principle.

Do you think all FIATS have this?

Bravo - brava era.
Mmmm, i doubt it, the GT has a Bosch ecu from memory so if its not a fire engined one then maybe. can't hurt trying i suppose.

Quote Originally Posted by djechouk View Post
Out of interest what fault will come up if you remove the catylitic converter and just have a straight pipe
No idea tbh but i'd hazzard a guess at 1222

That list shown is not exhaustive, there will be more codes i'm sure. If anyone reading knows anymore then feel free to comment and I'll add them.
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Re: How to read GT engine fault codes

So is the GT a fire engine if the timing goes
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Quote Originally Posted by djechouk View Post
So is the GT a fire engine if the timing goes
Its unlikely to be 'Safe.'.
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Old 01-03-2019   #9
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Re: How to read GT engine fault codes

no the GT is the lampredi SOHC engines, its an evolution of what was first fitted to the fiat 128 (way back in 1969) and was fitted to many many fiats in various forms over the years. So its a relation of the DOHC lampredi engines found in the lancia delta, the 16v versions of bravo/a's - even the 1.6 stilo and doblo were 16v lampredi engines. Good strong engines but very old design and pretty heavy too.

And yes Charlie, its an interference engine (both SOHC and DOHC versions) unlike the FIRE 8v's.
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Re: How to read GT engine fault codes

Ok so which of the fiats are fire engines I'm confused lol
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Re: How to read GT engine fault codes

Quote Originally Posted by djechouk View Post
Ok so which of the fiats are fire engines I'm confused lol
The 999, 1108 and 1242 8v engines are FIRE engines. But not all variants are 'safe', the later 1242 used in the Panda and 500 use VVT and are no longer safe.
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Re: How to read GT engine fault codes

to add, the 1242 16v and 1368 16v are also fire engines, both interference engines. the tjet and starjet engines are also fire based engines, again interference.

Basically if its a fire and its 8v its non-interference and if its fire and 16v it is interference.

From a mk1 punto point of view, all the engines are fire engines bar the GT and the early 1.6 sporting (or punto 90 as its often referred as) - both of these are 8v lampredi engines

The first fire engine was the 750 fire found in the classic panda, this happened in the very early 90's. Most but not all fiats from that era went to fire engines.
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Re: How to read GT engine fault codes

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