P0032 = Oxygen (A/F) Sensor Heater Control Circuit High (Bank 1 Sensor 1)
A P0032 DTC (diagnostic trouble code) refers to the O2 sensor (oxygen sensor) located on Bank 1 in front of the catalytic converter. There is also an oxygen sensor behind the converter which is Sensor #2.
This O2 sensor #1 may also be referred to as an air/fuel ratio sensor since on some vehicles it is. The sensor detects the amount of oxygen in the exhaust gas compared to the outside air and then vehicle's computer adjusts the air/fuel ratio going into the engine. The sensor is less effective when the exhaust gas temperature is low, so it includes a heater which is activated to help get better readings from the O2 sensor. Essentially this P0032 code means that the resistance of the heater circuit is higher than normal. In some cases, that resistance level must be higher than 10 A to trigger the DTC code.
A P0032 DTC trouble code may be caused by one or more of the following:
A short in the heater circuit in the sensor
A failed O2 sensor heater
Wiring/connectors broken/frayed leading to sensor and/or relay
Possible Solutions: To fix a P0032 DTC code, you'll need to do a proper diagnosis.
To do that, you'll want to inspect the wiring and connectors leading to the sensor.
Also if equipped with a heater relay and fuse, you'll want to check those as well.
Use a digital volt ohm meter to: check for 12 volts at the heater circuit feed (hint: unplug the sensor and check at the wiring connector to do this measurement)
check the ground circuit for continuity
measure the resistance of the heater circuit (done on the sensor itself)
measure the resistance and voltage of the wiring
Refer to a service manual for the correct specifications (volts, ohms) for your vehicle.
With that said, a common fix for this DTC is to replace the air/fuel (O2 oxygen) sensor #2 on bank 1. Please keep in mind that OEM (original equipment) replacement sensors are recommended, however aftermarket sensors may be used as long as these are OEM-equivalent.
There's also a chance that replacement parts for the P0032 code may also fall under a federal emissions warranty (check with your dealer to see if it's covered).
Definition: Reading Lamp Control-Circuit Short To Ground
Description: The Body Control Module (BCM) detects greater than 10.0 amps on the Reading Lamps Driver circuit. Four retry attempts in a row have failed.
Failure Type: Circuit Short To Ground
This sub type is used for failures, where the control module measures ground (battery negative) potential for greater than a specified time period or when some other value is expected.
Faulty Reading Lamp
Reading Lamp harness is open or shorted
Reading Lamp circuit poor electrical connection
Faulty Body Control Module (BCM)
Read more: https://www.autocodes.com/b161e_jeep.html