HO2S Heater Control Circuit Low Bank 1 Sensor2
symptoms
Other than the MIL light illuminating you may not notice any performance issues.
cause
A short in the O2 sensor heater circuit or the sensor itself
A faulty O2 sensor heater
Wiring or connectors are broken or frayed to the sensor or relay
Bad PCM or ECM
The fix
Correct wiring short or loose connector found in inspection.
and/or
Replace the bank 1 sensor 2, O2 sensor
Replace PCM if circuit has failed and no wiring issues present, good O2 sensor
P0058 HO2S Heater Control Circuit High (Bank 2 Sensor 2)
P0042 HO2S Heater Control Circuit (Bank 1 Sensor 3)
Trouble code P1032 means: HO2S heater warm-up control circuit (sensor 1 bank 1 & 2)
HO2S Heater Control Circuit Low Bank 1 Sensor2symptomsOther than the MIL light illuminating you may not notice any performance issues.causeA short in the O2 sensor heater circuit or the sensor itselfA faulty O2 sensor heaterWiring or connectors are broken or frayed to the sensor or relayBad PCM or ECMThe fixCorrect wiring short or loose connector found in inspection.and/orReplace the bank 1 sensor 2, O2 sensorReplace PCM if circuit has failed and no wiring issues present, good O2 sensor
Trouble code P0135 means:O2 sensor heater circuit malfunction (bank 1,sensor 1)
Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1)symptomsOther than the MIL light illuminating you may not notice any performance issues.causeA short in the O2 sensor heater circuit or the sensor itselfA faulty O2 sensor heaterWiring or connectors are broken or frayed to the sensor or relayBad PCM or ECMThe fixCorrect wiring short or loose connector found in inspection.and/orReplace the bank 1 sensor 1 O2 sensor
Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1)symptomsOther than the MIL light illuminating you may not notice any performance issues.causeA short in the O2 sensor heater circuit or the sensor itselfA faulty O2 sensor heaterWiring or connectors are broken or frayed to the sensor or relayBad PCM or ECMThe fixCorrect wiring short or loose connector found in inspection.and/orReplace the bank 1 sensor 1 O2 sensor
PO120 EOBD Code Throttle position sensor A/ Accelerator pedal position sensor A/ - circuit malfunction.
To remove the heater control from the dashboard of a 1993 Volvo 850, first, disconnect the car battery to ensure safety. Then, carefully pry off the trim panel surrounding the heater control using a trim removal tool. Once the trim is removed, unscrew the screws securing the heater control unit and disconnect any electrical connectors. Finally, pull the heater control out of its housing to complete the removal.
The P0135 code for a Volvo V70 indicates a problem with the oxygen sensor heater circuit in Bank 1. To fix this, start by inspecting the wiring and connectors leading to the upstream oxygen sensor for any damage or corrosion. If the wiring is intact, you may need to replace the faulty oxygen sensor itself. After replacement, clear the code and perform a test drive to ensure the issue is resolved.
Trouble code P0722 means:Output speed sensor circuit no signal
Usually right above your temperature control on your dash