P0132
DTC P0132
Circuit Description
Heated oxygen sensors (HO2S) are used for fuel control and post catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content in the exhaust stream. The HO2S must reach operating temperature to provide an accurate voltage signal. Heating elements inside the HO2S minimize the time required for the sensors to reach operating temperature. The powertrain control module (PCM) supplies the HO2S with a reference, or bias, voltage of about 450 mV. When the engine is first started, the PCM operates in open loop, ignoring the HO2S voltage signal. Once the HO2S reaches operating temperature and Closed Loop is achieved, the HO2S generates a voltage within a range of 0-1,000 mV that fluctuates above and below bias voltage. High HO2S voltage indicates a rich exhaust stream. Low HO2S voltage indicates a lean exhaust stream. If the PCM detects an HO2S voltage that stays above a specified value, DTC P0132 sets.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P0132 HO2S Circuit High Voltage Sensor 1
Conditions for Running the DTC
Rich Test Enable
* DTCs P0068, P0069, P0097, P0098, P0101, P0102, P0103, P0106, P0107, P0108, P0117, P0118, P0120, P0121, P0201, P0202, P0203, P0204, P0220, P0442, P0443, P0446, P0449, P0452, P0453, P0461, P0496, P1516, P1681, P2101, P2135, P2176 are not set.
* The Loop Status parameter is closed.
* The Ignition 1 Signal parameter is between 11-18 volts.
* The Fuel Level Sensor parameter is more than 10 percent.
* The Throttle Position (TP) Sensor parameter is between 0-50 percent.
* The catalyst test is not active.
* Traction control is not active.
* The air/fuel ration is between 14.5-14.8.
* DTC P0132 runs the rich test continuously when the above conditions are met for 2 seconds.
Decel Fuel Cutoff Test Enable
* DTCs P0068, P0069, P0097, P0098, P0101, P0102, P0103, P0106, P0107, P0108, P0117, P0118, P0120, P0121, P0201, P0202, P0203, P0204, P0220, P0442, P0443, P0446, P0449, P0452, P0453, P0461, P0496, P1516, P1681, P2101, P2135, P2176 are not set.
* The Ignition 1 Signal parameter is between 11-18 volts.
* The Fuel Level Sensor parameter is more than 10 percent.
* The Engine Run Time parameter is more than 200 seconds.
* The decel fuel cutoff mode is enabled.
* The catalyst test is not active.
* Traction control is not active.
* DTC P0132 runs the decel fuel cutoff test continuously when the above conditions are met for 2 seconds.
Conditions for Setting the DTC
Rich Test
* The PCM detects that the HO2S 1 parameter is more than 1,000 mV.
* DTC P0132 sets within 15 seconds during the rich test when the above condition is met.
Decel Fuel Cutoff Test
* The PCM detects that the HO2S 1 parameter is more than 900 mV.
* DTC P0132 sets within 40 seconds during the decel fuel cutoff test when the above condition is met.
Action Taken When the DTC Sets
* The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
* The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.
* The control module commands the Loop Status open.
Conditions for Clearing the MIL/DTC
* The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
* A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
* A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
* Clear the MIL and the DTC with a scan tool.
Test
