B1442
Book Code B1442 Inspection
Automotive Climate Control
Low / Normal Under Shade
Code B1442 - Air Inlet Door Motor Circuit (Toyota / Lexus)
Fault in the actuator controlling the fresh air vs recirculated air intake flap.
Safe to Drive? ✅ Yes, Safe
Estimated Repair Cost 150 - 450 SAR
Common Makes Toyota, Lexus
System Category motor
Symptoms of Trouble Code B1442:
- ⚠️ Exhaust fumes and dust constantly leaking into the cabin
- ⚠️ Significant drop in cooling performance during hot daytime driving
- ⚠️ Clicking noise behind glovebox when toggling recirculation button
Common Causes Behind Code B1442:
- 🔍 Broken nylon gears in recirculation servo actuator
- 🔍 Cabin air filter incorrectly installed, physically blocking flap
- 🔍 Electrical harness disconnected
Diagnostic Procedure Recommended by Auto Save Technicians:
- 1 Remove glovebox and extract cabin air filter
- 2 Visually observe intake door while pressing recirculation button
- 3 Ensure no foreign debris or misaligned filter is jamming the door flap
Specialist Recommendation:
Request Parts & Repair Quote
Verify cabin air filter is not installed backwards or obstructing the flap.
Associated Components: Air Inlet Servo Motor Cabin Air Filter
Frequently Asked Questions: Code B1442
Why do outside exhaust smells leak inside when AC is on?
Usually caused by failed actuator B1442 leaving the fresh air intake flap stuck open.