DTC P0138 Cadillac
HO2S Circuit High Voltage Bank 1 Sensor 2
HO2S Circuit High Voltage Bank 1 Sensor 2
Description
P0132, P0138, P0152, or P0158 DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0121, P0122, P0123, P0128, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0220, P0222, P0223, P0442, P0443, P0446, P0449, P0455, P0496, P1516, P2101, P2119, P2135, P2176 are not set. The engine is operating in Closed Loop. The Ignition 1 voltage is between 10-18 volts. The fuel level is greater than 10 percent. The throttle position (TP) is between 0-70 percent. DTCs P0137 and P0138 run continuously when the above conditions are met for 2 seconds.
Cause and Solution
P0132, P0138, P0152, or P0158
The ECM detects that the HO2S voltage is greater than 1,050 mV.
Video Guide
Diagnostic Info
- DTC Code: P0138
- Brand: Cadillac