B0184 code meaning
Rear Blower Motor Circuit
What B0184 means
No publicly available J2012 list includes B0184, and no maker documents it as a rear blower code. In Saab's 9-3 climate control the number belongs to the solar sensor: B0184 06 means that circuit is open or shorted to ground, and the system then regulates as on an overcast day. GM's Global A models report a rear blower speed circuit fault as B0208; GM bulletin PIT5383A lists B0208 among the HVAC codes of several 2015 GM models. Rear blowers serve the second and third rows of vans and large SUVs. In the 2011 Saab 9-5 an auxiliary blower module converts a PWM command into a motor voltage between 2 and 13 V, and a grounded, open or shorted command line stops the rear fan. A Hyundai patent notes that a stalled HVAC motor can draw several hundred mA. A related code is B0330.
B0184 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B0184
- No airflow from the rear roof or floor vents
- Rear seats stay warm in summer or cold in winter while the front is comfortable
Common causes of B0184
- Most likelyLong harness run to the rear blower open or shorted, often at body joints or under trim
- PossibleAuxiliary blower control module or rear resistor failed
- PossibleRear blower motor worn or blocked by debris drawn in through the rear intake
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Rear blower motorRear blower resistorHvac control module
What each part of B0184 means
| B | Body system: airbags, seat belts, power seats, lights and climate control. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 84 | The exact fault in that area. |
What to do next
- Note B0184 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about B0184
What does B0184 mean?
B0184 means "Rear Blower Motor Circuit". No publicly available J2012 list includes B0184, and no maker documents it as a rear blower code. It is a generic code, so it means the same on every make.
Is it safe to drive with B0184?
B0184 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0184 fail an emissions test?
B0184 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is B0184 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will B0184 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.