DTC P11AF GMC
HO2S Performance - Signal High During Moderate Load Sensor 2
HO2S Performance - Signal High During Moderate Load Sensor 2
Description
P11AF or P11B2 The engine run time is greater than 10 s. The engine speed is between 1,300 and 2,600 RPM. The intake air temperature is between -43 to +123°C (-45 to +253°F). The BARO pressure is between 75-110 kPa (11-16 psi). The battery voltage is greater than 11 V. The EGR is commanded ON and the exhaust gas temperature sensor 2 is between 100-1,000°C (212-1,832° F). The DPF regeneration is not active. The fuel level is greater than 15 percent. The DTCs run continuously once the above conditions are met.
Cause and Solution
P11AF or P11B2The ECM receives a serial data message from the NOx sensor module that the HO2S signal is outside the normal limits during moderate engine load conditions for greater than 1 s.
Video Guide
Diagnostic Info
- DTC Code: P11AF
- Brand: GMC