B0335 code meaning
Driver Seat Heater Circuit
What B0335 means
B0335 is unsupported by J2012 lists and by service information; its topic duplicates B0341. The circuit is the heating mat in the driver cushion and backrest plus its supply. Real codes elsewhere: Saab's 9-3 climate module stores B2428 01 when the left heater is shorted to battery voltage and B2429 06 for an open left heater; GM's 2011 Saab 9-5 measures current and voltage every 10 s and sets B2425 0B/0D/0E for high current, high or low resistance. Chrysler bulletin 08-049-14 (Wrangler 2011–12) replaced elements whose resistance fell out of range below −12 °C (B1092). Patent US5229579A cuts power on a detected short or open to prevent overheating.
B0335 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B0335
- Driver seat stays cold although heating is switched on
- Seat heating indicator flashes or goes out after a few seconds
- Only the backrest or only the cushion warms up
Common causes of B0335
- Most likelyHeating wire in the driver cushion broken by repeated flexing
- PossibleSeat heater connector under the seat loose or burnt
- PossibleElement or feed wire shorted to the seat frame
- Less likelyOutput stage of the seat heating or climate module defective
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Seat heater elementSeat wiring harness
What each part of B0335 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). |
| 35 | The exact fault in that area. |
What to do next
- Note B0335 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 B0335
What does B0335 mean?
B0335 means "Driver Seat Heater Circuit". B0335 is unsupported by J2012 lists and by service information; its topic duplicates B0341. It is a generic code, so it means the same on every make.
Is it safe to drive with B0335?
B0335 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0335 fail an emissions test?
B0335 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 B0335 to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will B0335 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.