Bump up to 38 psi and see if anything changes. We have had to go to 40-43 psi to keep the TPMS message from turning on. 32 psi might be the default low that turns on the message.
TPMS non replaceable batteries only last about 10 years or so.
TPMS sensors go to sleep after the car is shut off. Adding/removing 5 psi will turn them on. Driving the car, tire motion will also turn the back on. You could have a lazy sensor not turning back on.
Checking reading with your TPMS reader will also turn on the sensors.
Below are TPMS codes. There should be UEM codes stored. This will not turn on the check engine message. Only an ECM code or a message in TCM will turn on the chicken light.
A better OBD reader will read other module codes. Once the UEM TPMS code(s) are displayed, you will need to go into extended code reading and look for Binary or Hexadecimal numbers. All TPMS sensors have their own Bi or Hex numbers, no 2 are alike. Using you TPMS tool, ping each wheel sensor and look for matching Binary or Hexadecimal numbers, that will be the lazy/offending sensor. The UEM or rearview mirror is the receiver for TPMS and remote locking/unlocking. P2 car logic is it is supposed to see 4 wheel sensor pressure inputs. If one or more of the 4 are missing, it populates a code. The car does not know which tire, that is for you to find out.
More UEM TPMS info in the PDF’s.
Below info from VIDA.
Tire pressure monitoring system (TPMS)
The Upper electronic module (UEM) may store diagnostic trouble codes (DTCs) in the event of an error in the actual receiver or in a sensor. In order to carry out a correct evaluation of the function, the vehicle must have traveled faster than 40 km/h (25 mph) for longer than 570 seconds (approximately 9.5 minutes). This time is accumulated time, i.e. the counted time is interrupted if the vehicle travels slower than 40 km/h (25 mph), if for example, stopping at traffic lights. Counting continues as soon as the vehicle exceeds 40 km/h (25 mph). The Upper electronic module (UEM) can store two diagnostic trouble codes (DTCs) per sensor. A diagnostic trouble code (DTC) for lost communication and a diagnostic trouble code (DTC) for low battery voltage. When a diagnostic trouble code (DTC) is stored the ID number is also stored on the sensor which the diagnostic trouble code (DTC) applies to. When a diagnostic trouble code (DTC) is stored a message is shown in the Driver information module (DIM).
TPMS non replaceable batteries only last about 10 years or so.
TPMS sensors go to sleep after the car is shut off. Adding/removing 5 psi will turn them on. Driving the car, tire motion will also turn the back on. You could have a lazy sensor not turning back on.
Checking reading with your TPMS reader will also turn on the sensors.
Below are TPMS codes. There should be UEM codes stored. This will not turn on the check engine message. Only an ECM code or a message in TCM will turn on the chicken light.
A better OBD reader will read other module codes. Once the UEM TPMS code(s) are displayed, you will need to go into extended code reading and look for Binary or Hexadecimal numbers. All TPMS sensors have their own Bi or Hex numbers, no 2 are alike. Using you TPMS tool, ping each wheel sensor and look for matching Binary or Hexadecimal numbers, that will be the lazy/offending sensor. The UEM or rearview mirror is the receiver for TPMS and remote locking/unlocking. P2 car logic is it is supposed to see 4 wheel sensor pressure inputs. If one or more of the 4 are missing, it populates a code. The car does not know which tire, that is for you to find out.
More UEM TPMS info in the PDF’s.
Below info from VIDA.
Tire pressure monitoring system (TPMS)
The Upper electronic module (UEM) may store diagnostic trouble codes (DTCs) in the event of an error in the actual receiver or in a sensor. In order to carry out a correct evaluation of the function, the vehicle must have traveled faster than 40 km/h (25 mph) for longer than 570 seconds (approximately 9.5 minutes). This time is accumulated time, i.e. the counted time is interrupted if the vehicle travels slower than 40 km/h (25 mph), if for example, stopping at traffic lights. Counting continues as soon as the vehicle exceeds 40 km/h (25 mph). The Upper electronic module (UEM) can store two diagnostic trouble codes (DTCs) per sensor. A diagnostic trouble code (DTC) for lost communication and a diagnostic trouble code (DTC) for low battery voltage. When a diagnostic trouble code (DTC) is stored the ID number is also stored on the sensor which the diagnostic trouble code (DTC) applies to. When a diagnostic trouble code (DTC) is stored a message is shown in the Driver information module (DIM).
UEM-00A0 Tire pressure sensor. Signal missing
UEM-00A1 Tire pressure sensor. Signal missing
UEM-00A2 Tire pressure sensor. Signal missing
UEM-00A3 Tire pressure sensor. Signal missing
UEM-00A4 Tire pressure sensor. Low battery voltage
UEM-00A5 Tire pressure sensor. Low battery voltage
UEM-00A6 Tire pressure sensor. Low battery voltage
UEM-00A7 Tire pressure sensor. Low battery voltage
UEM-00A8 Tire pressure warning. Sensor missing