Engine-Codes - Cadillac - B153F CADILLAC

B153F CADILLAC - Liftgate Object Sensor Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

B153F CADILLAC Possible Causes

  • Faulty Liftgate Object Sensors
  • Liftgate Object Sensors harness is open or shorted
  • Liftgate Object Sensors circuit poor electrical connection
  • Faulty Liftgate Control Module

How is the B153F CADILLAC code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Tech Notes

B153F 02 Liftgate Object Sensor Signal Circuit Short to Ground
B153F 03 Liftgate Object Sensor Signal Circuit Voltage Below Threshold
B153F 05 Liftgate Object Sensor Signal Circuit Short to Battery or Open
B153F 07 Liftgate Object Sensor Signal Circuit Voltage Above Threshold

What is the cost to diagnose the B153F CADILLAC code

Labor: 1.0

The cost to diagnose the B153F CADILLAC code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B153F CADILLAC Meaning

The liftgate object sensors are pressure sensitive touch tapes located on either side of the upper inside edge of the liftgate panel. The two liftgate object sensors are placed in series between the liftgate object sensor signal circuit and the liftgate object low reference circuit. Each object sensor has a resistor as well as a switch. The resistors enable the liftgate control module to perform diagnostic functions on the circuits. When both liftgate object sensors are not pressed, the 5 volt reference voltage supplied by the liftgate control module passes through the resistors and the liftgate control module detects approximately 3.3 volts. Pressing a liftgate object sensor will cause the voltage to drop to approximately to 2.5 volts indicating an obstruction is present. If the liftgate is in the open position, the liftgate control module will prohibit liftgate movement. If the obstruction occurs during the power close function, the liftgate control module will command the liftgate to reverse direction.

More Information

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