Technical Grande Punto Ecu Error code

[silex]

The engine light is constantly on and I have had it checked out, the error code that came back was not recognised, so the chap reset the ECU and it went away. 2 days later it has come back.
the code given by the diagnostic test was 00321 (0141)
The chap said he was expecting a P code, but that was all he got.
Does anyone know if it is Fiat specific, is there anywhere I can find the error codes, I have done usual searches, but they reveal nothing, Gendan is good, but it cannot make sense of it either, any help would be much appreciated.

 

[Davren]

The numbers you've posted are not normally recognised fault codes, however some fault code readers give a "coded" code that you have to look up in a book that accompanies the code reader.

The (0141) may refer to P0141 which is "O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)". Bank 1 Sensor 2 refers the the post cat O2 sensor.

If this is correct, the car could be suffering with poor idle and/or performance only when cold.

May help if you posted what (if any) symptoms the car has.

 

[silex]

Thanks Davren,

The car is performing fine, their is no noticeable problem with the car.
Where on the car would this sensor be located?

 

[Davren]

Where on the car would this sensor be located?

It's exact location will depend on what year you car is and which engine it has, but post cat O2 (Lambda) sensors are usually screwed into the exhaust pipe just downstream of the (or one of the) catalytic converter(s).

There will be a similar sensor upstream of the cat. but a fault with that would be indicated as (Bank 1 Sensor 1).

 

[silex]

thanks for all your help, I shall take a look and see if their is anything obvious

 

[Juggers2k]

The (0141) may refer to P0141 which is "O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)". Bank 1 Sensor 2 refers the the post cat O2 sensor.

If this is correct, the car could be suffering with poor idle and/or performance only when cold.

If it's a rear sensor fault, then under normal circumstances it shouldn't really affect the running of the engine at all.
The rear sensors are only there due to a requirement of the EOBD regulations that the car monitor the performance of the catalyst and turn on the Check Engine Light if the cat's not working properly - so the rear sensor reading is compared to the reading from the front (pre-cat) sensor to gauge the performance of the cat.

All the fuelling decisions made by the ECU will be made based on the readings from the front sensor, before the catalyst (which is a bit of an unknown quantity) has affected the gases.

 

[silex]

Many thanks for the info.
Interestingly the light has gone off, before I had chance to look, it has been a couple of days now. i'll just have to monitor it