B0920 code meaning
Washer Pump Circuit
What B0920 means
B0920 has no verifiable source: it is absent from J2012 excerpts and from all published service information. The title covers the washer fluid pump circuit. GM's 2011 Saab 9-5 lets the body control module start the pump together with low-speed wiping as soon as washing is requested; with a supply of 9 to 16 V it watches the relay control line, stores B3873 02 on a short to ground and suspends washing. Headlamp washing there is a separate circuit (B3810) and only runs with low or high beam on, then pauses for 4 wash cycles or 48 hours. The 9-3 sets B3873 06 below 6 V on its relay output. FMVSS 104 requires a windshield washing system on passenger cars, and HELLA describes centrifugal pumps in the reservoir for such systems. Wipers: B0900, B0910.
B0920 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 1.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B0920
- No washer fluid sprays when the wash switch is used
- Washer pump runs continuously
- Headlamp washers inoperative as well on shared circuits
Common causes of B0920
- Most likelyWasher pump motor seized, often after running dry or freezing
- PossibleCorroded plug at the pump in the wheel arch
- PossibleWasher relay or its control line faulty
- Less likelyRelay driver in the body control module faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Washer pumpBody control module
What each part of B0920 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). |
| 20 | The exact fault in that area. |
What to do next
- Note B0920 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 B0920
What does B0920 mean?
B0920 means "Washer Pump Circuit". B0920 has no verifiable source: it is absent from J2012 excerpts and from all published service information. It is a generic code, so it means the same on every make.
Is it safe to drive with B0920?
B0920 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0920 fail an emissions test?
B0920 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 B0920 to fix?
Difficulty: easy. A typical repair takes 0.3 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will B0920 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.