P1117: This code concerns the electrical heater circuit of bank 1 oxygen sensor 2.
Meaning, symptoms, causes and checks
This code concerns the electrical heater circuit of bank 1 oxygen sensor 2. It does not directly assess catalyst efficiency.
Affected system: Oxygen sensors and emissions
Symptoms
- The malfunction indicator may be illuminated.
Possible causes
- Sensor-heater or wiring fault.
What to check
- Test the heater and circuit against vehicle specifications; assess the control module only after these are ruled out.