FiatEcuScan Code Help
Recently had the engine management (yellow motor) light come on and went down the route of trying to understand it myself first. Purchased a USB (VAG-Com) cable and downloaded the FiatEcuScan free software - sorry tight budget.
The car is an Alfa GTV 2.0 TS 2001 with EOBD Bosch ECU ME7.3.1.
The error codes that have come up are (in order shown):
1172 - Mixture correction (multiplicative) - ECU run out of range in adapting the mixture in reference to the O2 sensor signal
1175 - Mixture 2 strength (multiplicative) - Very high signal from sensor. Fault present now.
1178 - Mixture 2 strength (multiplicative) - Very high signal from sensor. Fault not detected now.
1176 - Mixture 2 strength (additive) - Very low signal from sensor. Fault present now.
1173 - Mixture 1 strength (additive) - ECU run out of range in adapting the mixture in reference to the O2 sensor signal and/or possible engine temp. sensor/circuit defective or fuel pressure incorrect or fuel injector(s) leaking/clogged or incomplete combustion (excess 02 in exhaust) or vacuum leak
The O2 signal 2 after-CAT is registering no volts when the pre-CAT is 0.465V and the 02 signal 1 after/pre CAT are 0.460V/0.455V.
The 02 S2 heater after-CAT test fails.
I would appreciate any help in understanding these codes but from looking at various forums I am assuming that I am looking at a lambda sensor failure in the exhaust pipe rather than a MAF issue? Or is this a sign of a more serious issue merely compounded by the sensor issue?
Last edited by GTVNovice; 07-06-10 at 10:34.