33
HP Printer
Severity: MinorWhat Does This Error Mean?
Error 33 on an HP printer means the printer detected a paper path problem. Typically, a page did not reach the paper size sensor in time, or the wrong paper size was loaded. Adjusting the paper tray guides and confirming the correct paper size usually fixes this.
Affected Models
- HP LaserJet IID
- HP LaserJet IIID
- HP LaserJet 4 Plus
- HP LaserJet 4M Plus
- HP LaserJet 5 Series
Common Causes
- The paper tray guides are not adjusted snugly against the paper stack
- Paper loaded in the tray is a different size than what the printer is configured to expect
- Multiple sheets are feeding at once, disrupting the paper path timing
- The paper size sensor inside the printer is dirty or stuck
- Worn paper pick rollers are not feeding paper through at the correct speed
How to Fix It
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Open the paper tray and remove all paper. Check that the side and rear guides are adjusted snugly to the paper size.
Loose guides let paper shift during feeding, confusing the paper size sensors.
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Confirm the paper size setting on the printer matches the paper you have loaded.
On most HP LaserJets, the paper size can be set in the Tray menu on the control panel.
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Fan the paper stack before reloading it to prevent sheets from sticking together and double-feeding.
Bend the stack slightly, let it spring back, and tap the edges on a flat surface to align the sheets.
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Clean the paper pick rollers with a lint-free cloth lightly dampened with water. Let them dry before closing the tray.
Dirty or glazed rollers are a very common cause of paper feed errors on older HP LaserJets.
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Print a test page. If the error clears, it was a paper feed issue. If error 33 reappears, the sensor may need professional service.
Try printing with only a small stack of 20 to 30 sheets if the error only appears with a full tray.
When to Call a Professional
If adjusting the paper guides and cleaning the rollers does not fix error 33, the paper size sensor may be faulty. A technician can test and replace the sensor — it is typically a minor repair costing $50 to $80 including labor.
Frequently Asked Questions
Why does error 33 happen more often in humid weather?
Humidity causes paper to absorb moisture and swell slightly. Swollen paper does not feed through the paper path as smoothly, triggering timing errors like error 33. Storing paper in a sealed package until use helps prevent moisture absorption.
Does error 33 mean I need new pick rollers?
Not necessarily, but pick rollers are often involved. If cleaning the rollers does not help and you have been using the printer heavily for several years, replacement rollers may be needed. HP sells roller maintenance kits for most LaserJet models.
Can I use any brand of paper to avoid error 33?
Better quality paper with consistent thickness feeds more reliably. Cheap or recycled paper is more likely to cause feed timing errors. HP recommends using 20 lb (75 g/m2) plain white laser paper for best results.