VOLVO
ECM-28AA - Front heated oxygen sensor (HO2S), bank 1. Signal too low
Układ
Sterownik silnika (ECM)
Modele Volvo, których dotyczy ten kod błędu
Dotyczy następujących modeli:
2 modeleS40 (2004–2013), V50 (2004–2013)
Pokaż modele wg rocznika i silnika (2)
Co oznacza ten kod błędu?
Although the code is named signal too low, it is set when the readings of the front and rear oxygen sensors do not agree, or when the front sensor signal indicates a mixture that is incorrect compared with what the control module expects. The problem could sit in either the front or rear sensor circuit, or in the exhaust system.
Możliwe przyczyny
- Leakage in the exhaust system
- Damaged oxygen sensor
- Poor contact or oxidation in the connections
- Short circuit to supply voltage or ground in the signal wire (-)
Co możesz zrobić
- 1Check the exhaust system for air leaks, for example at joints, gaskets and around the oxygen sensors
- 2Check that the sensor connectors are clean and secure. Do not use rust solvent or grease on them
- 3If the exhaust is sealed but the fault remains, have a workshop replace the oxygen sensors as needed, since the code can also be set by a defective front or rear sensor
Objawy, które możesz zauważyć1
- Malfunction indicator lamp (MIL) lit
Na co może wpływać usterka2
- Oxygen sensor control is switched off
- Catalytic converter diagnostics are switched off
Ogólne wskazówki dla właścicieli. Diagnostyka na samochodzie może wskazać inną przyczynę.