Pinpoint Test Dz: Universal Heated Oxygen Sensor (Ho2S)
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
While conducting tests on a hot engine take all safety precautions to prevent skin contact with hot engine components. Failure to follow these instructions may result in personal injury.
NOTE:
Only diagnose the suspect universal HO2S indicated by the DTC.
Normal Operation and Fault Conditions
Refer to the DTC Fault Trigger Conditions.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| PCM P0030:00 | HO2S Heater Control Circuit (Bank 1, Sensor 1): No Sub Type Information | Sets when PCM detects the sensor does not warm up to the required temperature in a calibrated amount of time. This DTC also sets when the PCM is not able to maintain the required temperature after the sensor is warm. The PCM controls the heater ON and OFF duty cycle to maintain a calibrated temperature. |
| PCM P0040:00 | Oxygen Sensor Signals Swapped Bank 1 Sensor 1 / Bank 2 Sensor 1: No Sub Type Information | Sets when PCM detects no response from the universal HO2S being tested. The HO2S monitor determines if the universal HO2S signal response for a fuel shift corresponds to the correct engine bank. Connect the universal HO2S connector to the correct bank. |
| PCM P0050:00 | HO2S Heater Control Circuit (Bank 2, Sensor 1): No Sub Type Information | Sets when PCM detects the sensor does not warm up to the required temperature in a calibrated amount of time. This DTC also sets when the PCM is not able to maintain the required temperature after the sensor is warm. The PCM controls the universal HO2S bank 2, sensor 1 heater ON and OFF duty cycle to maintain a calibrated temperature. |
| PCM P0053:00 | HO2S Heater Resistance (Bank 1, Sensor 1): No Sub Type Information | Sets when PCM detects the heater current requirements are too low or too high in the UO2SHTR11 circuit. |
| PCM P0059:00 | HO2S Heater Resistance (Bank 2, Sensor 1): No Sub Type Information | Sets when PCM detects the heater current requirements are too low or too high in the UO2SHTR21 circuit. |
| PCM P0130:00 | O2 Sensor Circuit (Bank 1 Sensor 1): No Sub Type Information | Sets when PCM detects a concern with one of the circuits used to determine the oxygen content in the exhaust gas. |
| PCM P0131:00 | O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1): No Sub Type Information | Sets when PCM detects a concern with one of the circuits used to determine the oxygen content in the exhaust gas. An engine stall condition or an extremely rich air to fuel ratio may set this DTC. Diagnose any engine stall or rich air to fuel ratio concerns before diagnosing this DTC. An engine stall condition or an extremely rich air to fuel ratio may set this DTC. Diagnose any engine stall or rich air to fuel ratio concerns before diagnosing this DTC. |
| PCM P0132:00 | O2 Sensor Circuit High Voltage (Bank 1 Sensor 1): No Sub Type Information | Sets when PCM detects an over voltage concern with one of the circuits used to determine the oxygen content in the exhaust gas. |
| PCM P0133:00 | O2 Sensor Circuit Slow Response (Bank 1 Sensor 1): No Sub Type Information | Sets when PCM detects the oxygen sensor signal does not reach the predicted amplitude within a predetermined response time. The PCM monitors oxygen sensor response time by commanding a calibrated fuel control routine. This routine sets the air fuel ratio to a calibrated limit to produce a predictable oxygen sensor signal amplitude. |
| PCM P0134:00 | O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1): No Sub Type Information | Sets when PCM is unable to detect movement in the sensor signal while the air to fuel ratio is oscillating. If the sensor signal value is not changing from the default value, the PCM commands an oscillating air to fuel ratio attempting to detect some movement in the signal value. |
| PCM P0135:00 | O2 Sensor Heater Circuit (Bank 1 Sensor 1): No Sub Type Information | Sets when PCM detects an open or short circuit is detected or the heater current draw exceeds a calibrated limit. |
| PCM P0150:00 | O2 Sensor Circuit (Bank 2 Sensor 1): No Sub Type Information | Sets when PCM detects a concern with one of the circuits used to determine the oxygen content in the exhaust gas. |
| PCM P0151:00 | O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1): No Sub Type Information | Sets when PCM detects a concern with one of the circuits used to determine the oxygen content in the exhaust gas. An engine stall condition or an extremely rich air to fuel ratio may set this DTC. Diagnose any engine stall or rich air to fuel ratio concerns before diagnosing this DTC. An engine stall condition or an extremely rich air to fuel ratio may set this DTC. Diagnose any engine stall or rich air to fuel ratio concerns before diagnosing this DTC. |
| PCM P0152:00 | O2 Sensor Circuit High Voltage (Bank 2 Sensor 1): No Sub Type Information | Sets when PCM detects an over voltage concern with one of the circuits used to determine the oxygen content in the exhaust gas. |
| PCM P0153:00 | O2 Sensor Circuit Slow Response (Bank 2 Sensor 1): No Sub Type Information | Sets when PCM detects the oxygen sensor signal does not reach the predicted amplitude within a predetermined response time. The PCM monitors the universal HO2S bank 2, sensor 1response time by commanding a calibrated fuel control routine. This routine sets the air to fuel ratio to a calibrated limit to produce a predictable oxygen sensor signal amplitude. |
| PCM P0154:00 | O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1): No Sub Type Information | Sets when PCM detects no movement in the sensor signal while the air to fuel ratio is oscillating. If the sensor signal value is not changing from the default value, the PCM commands an oscillating air to fuel ratio attempting to detect some movement in the signal value. |
| PCM P0155:00 | O2 Sensor Heater Circuit (Bank 2 Sensor 1): No Sub Type Information | Sets when PCM detects an open circuit, a short circuit or the universal HO2S bank 2, sensor 1 heater current draw exceeds a calibrated limit. |
| PCM P064D:00 | Internal Control Module O2 Sensor Processor Performance - Bank 1: No Sub Type Information | Sets when PCM detects an internal circuit or communication concern. The PCM monitors the application specific integrated circuit that controls and monitors the universal heated oxygen sensor HO2S bank 1, sensor 1. Check for other Diagnostic Trouble Codes (DTCs) and diagnose those first. Check for intermittent universal HO2S wiring concerns. Check the universal HO2S wiring between the PCM and the sensor for damage. Check for aftermarket performance products. Reprogram or update the calibration. Clear the Diagnostic Trouble Codes (DTCs), repeat the self-test. |
| PCM P064E:00 | Internal Control Module O2 Sensor Processor Performance - Bank 2: No Sub Type Information | Sets when PCM detects an internal circuit or communication concern. The PCM monitors the application specific integrated circuit that controls and monitors the universal HO2S bank 2, sensor 1. Check for other Diagnostic Trouble Codes (DTCs) and diagnose those first. Check for intermittent universal HO2S wiring concerns. Check the universal HO2S wiring between the PCM and the sensor for damage. Check for aftermarket performance products. Reprogram or update the calibration. Clear the Diagnostic Trouble Codes (DTCs), repeat the self-test. |
| PCM P1127:00 | Exhaust Temperature Out of Range, O2 Sensor Tests Not Completed: No Sub Type Information | Sets when PCM detects the inferred exhaust temperature is below a minimum calibrated value. The DTC P1127 is present if the exhaust is not hot. The HO2S monitor uses an exhaust temperature model to determine when the universal HO2S heaters are cycled ON. Monitor the universal HO2S heater PIDs to determine the ON or OFF state. The DTC P1127 is present if the exhaust is not hot. |
| PCM P1646:00 | Linear O2 Sensor Control Chip (Bank 1): No Sub Type Information | Sets when PCM detects an internal circuit or communication concern. The PCM monitors the application specific integrated circuit that controls and monitors the universal HO2S bank 1, sensor 1. Check for other Diagnostic Trouble Codes (DTCs) and diagnose those first. Check for other Diagnostic Trouble Codes (DTCs) and diagnose those first. Check for intermittent universal HO2S wiring concerns. Check the universal HO2S wiring between the PCM and the sensor for damage. Check for aftermarket performance products. Reprogram or update the calibration. Clear the Diagnostic Trouble Codes (DTCs), repeat the self-test. |
| PCM P1647:00 | Linear O2 Sensor Control Chip (Bank 2): No Sub Type Information | Sets when PCM detects an internal circuit or communication concern. The PCM monitors the application specific integrated circuit that controls and monitors the universal HO2S bank 2, sensor 1. Check for other Diagnostic Trouble Codes (DTCs) and diagnose those first. Check for intermittent universal HO2S wiring concerns. Check the universal HO2S wiring between the PCM and the sensor for damage. Check for aftermarket performance products. Reprogram or update the calibration. Clear the Diagnostic Trouble Codes (DTCs), repeat the self-test. |
| PCM P164A:00 | O2 Sensor Positive Current Trim Circuit Performance (Bank 1 Sensor 1): No Sub Type Information | Sets when PCM detects an inconsistent or erratic measurement of the resistor. A resistor is installed in the universal HO2S bank 1, sensor 1 connector for part to part variance. The PCM determines the value of this resistor by taking multiple measurements of the resistor during each ignition ON event. The PCM uses this value to compensate for the variance in the pumping current signal. |
| PCM P164B:00 | O2 Sensor Positive Current Trim Circuit Performance (Bank 2 Sensor 1): No Sub Type Information | Sets when PCM detects an inconsistent or erratic measurement of the resistor. A resistor is installed in the universal HO2S bank 2, sensor 1 connector for part to part variance. The PCM determines the value of this resistor by taking multiple measurements of the resistor during each ignition ON event. The PCM uses this value to compensate for the variance in the pumping current signal. |
| PCM P2096:00 | Post Catalyst Fuel Trim System Too Lean Bank 1: No Sub Type Information | Sets when PCM detects the correction value is greater than a calibrated limit. The PCM monitors the correction value from the HO2S bank 1, sensor 2 as part of the fore-aft oxygen sensor control routine. |
| PCM P2097:00 | Post Catalyst Fuel Trim System Too Rich Bank 1: No Sub Type Information | Sets when PCM detects the correction value is greater than a calibrated limit. The PCM monitors the correction value from the HO2S bank 1, sensor 2 as part of the fore-aft oxygen sensor control routine. |
| PCM P2098:00 | Post Catalyst Fuel Trim System Too Lean Bank 2: No Sub Type Information | Sets when PCM detects the correction value is greater than a calibrated limit. The PCM monitors the correction value from the HO2S bank 2, sensor 2 as part of the fore-aft oxygen sensor control routine. |
| PCM P2099:00 | Post Catalyst Fuel Trim System Too Rich Bank 2: No Sub Type Information | Sets when PCM detects the correction value is greater than a calibrated limit. The PCM monitors the correction value from the HO2S bank 2, sensor 2 as part of the fore-aft oxygen sensor control routine. |
| PCM P2237:00 | O2 Sensor Positive Current Control Circuit/Open - Bank 1, Sensor 1: No Sub Type Information | Sets when PCM detects a concern with the circuit used to determine the oxygen content in the exhaust gas. |
| PCM P2240:00 | O2 Sensor Positive Current Control Circuit/Open - Bank 2, Sensor 1: No Sub Type Information | Sets when PCM detects a concern with the circuit used to determine the oxygen content in the exhaust gas. |
| PCM P2243:00 | O2 Sensor Reference Voltage Circuit/Open - Bank 1, Sensor 1: No Sub Type Information | Sets when PCM detects a concern with the circuit used to determine the oxygen content in the exhaust gas. |
| PCM P2247:00 | O2 Sensor Reference Voltage Circuit/Open - Bank 2, Sensor 1: No Sub Type Information | Sets when PCM detects a concern with the circuit used to determine the oxygen content in the exhaust gas. |
| PCM P2251:00 | O2 Sensor Negative Current Control Circuit/Open - Bank 1, Sensor 1: No Sub Type Information | Sets when PCM detects a concern with the circuit used to determine the oxygen content in the exhaust gas. |
| PCM P2254:00 | O2 Sensor Negative Current Control Circuit/Open - Bank 2, Sensor 1: No Sub Type Information | Sets when PCM detects a concern with the circuit used to determine the oxygen content in the exhaust gas. |
| PCM P2626:00 | O2 Sensor Positive Current Trim Circuit/Open Bank 1 Sensor 1: No Sub Type Information | Sets when PCM detects the actual oxygen sensor voltage exceeds the maximum expected voltage threshold for a specified amount of time. During deceleration fuel shut-off the PCM monitors the integrity of the UO2SPCT11 circuit by comparing the actual oxygen sensor voltage signal to an expected oxygen sensor voltage signal. |
| PCM P2627:00 | O2 Sensor Positive Current Trim Circuit Low Bank 1, Sensor 1: No Sub Type Information | Sets when PCM detects the resistance value from the universal HO2S is too high. A resistor is installed in the universal HO2S connector for part to part variance. The PCM determines the value of this resistor by taking multiple measurements of the resistor during each ignition ON event. The PCM uses this value in order to compensate for the variance in the pumping current signal. |
| PCM P2628:00 | O2 Sensor Positive Current Trim Circuit High Bank 1, Sensor 1: No Sub Type Information | Sets when PCM detects a concern with the circuit used to determine the oxygen content in the exhaust gas. |
| PCM P2629:00 | O2 Sensor Positive Current Trim Circuit/Open Bank 2 Sensor 1: No Sub Type Information | Sets when PCM detects the actual oxygen sensor voltage exceeds the maximum expected voltage threshold for a specified amount of time. During deceleration fuel shut-off the PCM monitors the integrity of the UO2SPCT21 circuit by comparing the actual oxygen sensor voltage signal to an expected oxygen sensor voltage signal. |
| PCM P2630:00 | O2 Sensor Positive Current Trim Circuit Low Bank 2, Sensor 1: No Sub Type Information | Sets when PCM detects the resistance value from the universal HO2S is too high. A resistor is installed in the universal HO2S connector for part to part variance. The PCM determines the value of this resistor by taking multiple measurements of the resistor during each ignition ON event. The PCM uses this value in order to compensate for the variance in the pumping current signal. |
| PCM P2631:00 | O2 Sensor Positive Current Trim Circuit High Bank 2, Sensor 1: No Sub Type Information | Sets when PCM detects a concern with the circuit used to determine the oxygen content in the exhaust gas. |
Possible Sources
- HO2S circuitry concern
- Exhaust leak
- Intake air leak
- Engine not operating long enough before carrying out the KOER self-test
- MAF sensor (if equipped)
- HO2S (9Y460)
- PCM (12A650)
PINPOINT TESTS DZ: UNIVERSAL HEATED OXYGEN SENSOR (HO2S) (Gas)