DTC P2196:00 [L5]: Notes
WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DETECTION CONDITION & POSSIBLE CAUSES
| DTC P2196:00 |
A/F sensor signal stuck rich |
| DETECTION CONDITION |
- The PCM monitors the equivalence ratio when the following conditions are met. If the equivalence ratio is less than 0.85
for 25 s
, the PCM determines that the A/F sensor signal remains rich.
MONITORING CONDITIONS
- ECT more than 70°C {158°F}
- Engine speed 1, 000-3, 200 RPM
- Absolute load 20-62.5
%
- Output voltage from the A/F sensor: less than 0.2 V
Diagnostic support note
- This is an intermittent monitor (A/F sensor, HO2S).
- The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
- PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
- FREEZE FRAME DATA is available.
- The DTC is stored in the PCM memory
|
| POSSIBLE CAUSE |
- Erratic signal to PCM
- APP sensor signal malfunction
- ECT sensor signal malfunction
- MAF sensor signal malfunction
- TP sensor signal malfunction
- VSS signal malfunction
- A/F sensor malfunction
- A/F sensor deterioration
- A/F sensor heater malfunction
- Leakage exhaust system
- MAF sensor malfunction
- Fuel pump malfunction
- Pressure regulator (built-in fuel injection pump) malfunction
- Fuel pump unit malfunction
- Fuel leakage on fuel line from fuel distributor and fuel pump
- Fuel filter clogged or restricted
- Fuel injector malfunction
- PCM malfunction
|