B3898

Rear Compartment Occupant Sensor Signal Missing

Severity

⚠️ Medium

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

The security system malfunction indicator is on
Incorrect operation of airbags
Error B3898 in diagnostic scanner memory

Causes

Passenger presence sensor malfunction
Broken or damaged wiring harness
Problems with the security control unit
Short circuit in the sensor circuit

How to Fix

Check the integrity of the wiring harness to the sensor
Check resistance and power supply of the sensor
Replace sensor if necessary
Check the control unit for errors
Clear error memory and perform system test

Related codes

B0100 B0101 B3897