B0920Washer Pump Circuit
- Generic OBD-II code · Body
- How the car detects it
- 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 windscreen washing system on passenger cars, and HELLA describes centrifugal pumps in the reservoir for such systems. Wipers: B0900, B0910.
- What you may notice
- No washer fluid sprays when the wash switch is used
- Washer pump runs continuously
- Headlamp washers inoperative as well on shared circuits
- Likely causes
- 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
- RareRelay driver in the body control module faulty
- Repair
- Easy · Often possible to do yourself.Typical cost: €20 – €200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.