The civil PI trial in California is increasingly decided by what the jury never hears. Once a case clears summary judgment, the contested terrain shifts to the motion-in-limine docket, and the gap between motions trial judges still grant and motions they sigh at on the morning of trial has widened across the past two cycles.
Bench officers in Los Angeles, Riverside, Alameda, and San Diego counties have grown openly impatient with in limine practice that misuses the vehicle. Kelly v. New West Federal Savings (49 Cal.App.4th 659), R&B Auto Center v. Farmers Group of Companies (140 Cal.App.4th 327), and Amtower v. Photon Dynamics (158 Cal.App.4th 1582) still mark the outer fence: the motion is for specific evidentiary rulings, not backdoor summary adjudication and not sweeping prophylactic orders the court cannot police once witnesses are sworn. Motions that ignore that fence get denied without prejudice to re-raising the issue at sidebar — which, as a practical matter, is the same as losing them.
Plaintiff Motions That Reliably Survive
Five categories of plaintiff motion still draw clean orders from California trial courts in 2026. They belong in every PI trial binder by default, but the wording has to be specific to draw a granted order rather than a deferred one.
Howell ceiling for insured plaintiffs
Howell v. Hamilton Meats & Provisions, 52 Cal.4th 541 (2011), caps recoverable past medical specials at the amount actually paid and accepted by the provider, not the billed amount. A motion to exclude evidence of the billed-but-unpaid balance is granted reflexively when the plaintiff has health insurance and the defense has the EOBs in hand. The wrinkle worth flagging is Pebley v. Santa Clara Organics, 22 Cal.App.5th 1266 (2018): uninsured plaintiffs and plaintiffs treating on lien remain entitled to argue the reasonable value of services rendered, and a Pebley plaintiff's MIL to bar defense argument about "what insurance would have paid" still wins on the briefing.
Collateral source bar
Helfend v. Southern Cal. Rapid Transit Dist., 2 Cal.3d 1 (1970), is older than most of us in practice and still controls. Evidence of disability payments, workers' compensation, private health insurance reimbursement, or Medi-Cal contribution is barred. The motion should specifically list the payers identified in defense interrogatory responses rather than moving in the abstract — abstract motions invite the "we'll handle it at trial" denial.
Immigration status
Evidence Code section 351.2 codifies what Hernandez v. Paicius, 109 Cal.App.4th 452 (2003), had been holding by analogy: a personal injury plaintiff's immigration status is inadmissible to attack credibility or reduce damages absent a clear-and-convincing showing of direct materiality. Defense fishing for immigration status in deposition or trial is functionally dead in 2026. A short, targeted MIL with a section 351.2 anchor gets granted before the bench reads past the caption.
Liability insurance and subsequent remedial measures
Evidence Code sections 1155 (liability insurance) and 1151 (subsequent remedial measures) are statutory and uncontroversial. The motion still has to identify the specific evidence — the deposition page where a defense witness mentioned the policy, the post-collision repair invoice, the post-incident handrail installation — or the court will defer the ruling until the offer at trial.
Golden Rule and per-juror prohibitions
Trial courts continue to grant plaintiff motions barring "reptile" framing and per-juror "what would you accept?" arguments. The reciprocal defense motion barring plaintiff per diem closings has gotten harder to win since Beagle v. Vasold permits reasoned mathematical argument, but the Golden Rule bar is bilateral and still draws an order when briefed cleanly.
Plaintiff Motions That Routinely Lose
Five plaintiff motions are filed reflexively and denied reflexively. Filing them anyway burns credibility the court will need for the motions that actually matter.
Blanket bar on plaintiff's prior litigation
If the plaintiff has prior PI suits involving a different body part and a meaningful temporal gap, a section 352 motion may carry. A blanket "no mention of any prior lawsuit" order will not. Defense impeachment of an inconsistent injury narrative is core cross-examination, and trial courts treat the blanket form as overbroad.
"Low-impact" or "minor damage" defense theme
Plaintiff bar has tried for two decades to keep low-property-damage photos and biomechanical-impossibility framing out of soft-tissue trials. With limited exceptions, that motion fails. The defense expert qualification fight should be run as a Sargon challenge (Sargon Enterprises v. USC, 55 Cal.4th 747), not as a blanket in limine. The procedural mismatch behind that pattern tracks the broader theme our prior Hosan v. Patel analysis identified: courts dislike using one procedural vehicle to do another's work.
Seat belt non-use in standard MVA cases
California recognizes a seat belt defense that allows comparative-fault and mitigation argument when properly founded. A motion to bar seat belt non-use wholesale is denied. The narrower motion — bar the defense from arguing belt non-use without a biomechanical foundation tying non-use to specific injuries — sometimes carries and is the better filing.
Pre-emptive bar on DME doctor bias material
A defense medical exam doctor's history of testifying for the defense is classic bias material. It comes in on cross-examination. The reciprocal defense motion to bar plaintiff from raising the DME doctor's income from defense work is denied as a matter of course; the corresponding plaintiff motion that tries to pre-clear that cross is unnecessary and reads as filler.
Blanket bar on social media
Authenticity and section 352 prejudice motions targeting specific posts still win. Blanket motions to exclude all of plaintiff's social media history do not. Tag the post, attach the screenshot, brief the prejudice for that exhibit — or skip the motion.
The 2026 Frontier: AI Evidence, EDR Data, and Demonstratives
Three categories have moved into active in limine territory in the past eighteen months. The case law is still thin, which makes the briefing harder and the rulings less predictable, but the contours are visible.
AI-generated demonstratives — animated reconstructions of collisions, generative renderings of plaintiff's pre-injury function — face a Kelly/Frye-style foundational challenge plus a section 352 prejudice analysis. Plaintiff motions to exclude defense animations have succeeded where the defense expert could not articulate the inputs, training data, or human-in-the-loop adjustments; they fail where the animation is offered as illustrative rather than substantive. Best practice is to demand the underlying model parameters and the operator log in supplemental discovery before filing the motion, so the briefing has a record.
Event Data Recorder downloads and telematics data from connected vehicles are now standard defense exhibits in MVA work. Plaintiff motions to exclude EDR data on authenticity or chain-of-custody grounds rarely succeed when the defense complied with disclosure. Motions targeting the defense reconstructionist's reliance on EDR data without independent verification of pre-impact speed assumptions have more traction. The pattern reflects the same preservation-and-foundation framing that drove the appellate result in the recent Michigan pedestrian verdict appeal: the appellate posture rewards parties who built the record at the trial-court level.
Deepfake and authentication challenges to surveillance video have appeared in several reported California Superior Court rulings in the past year. The court will hold a section 402 hearing if a credible authentication challenge is briefed. The in limine filing should request that hearing specifically rather than seeking outright exclusion on the papers.
Procedural Errors That Sink Otherwise Meritorious Motions
The substantive law on most plaintiff motions has not changed. What sinks motions in 2026 is procedural craft.
Filing the motion as a backdoor summary adjudication — asking the court to find as a matter of law that the defense has no causation evidence, dressed up as a motion to exclude — gets denied under Amtower and R&B Auto Center. Trial judges are reading for that pattern now. Frame the motion as targeting specific exhibits and specific witness lines, identified by deposition page and exhibit number.
Filing too late triggers another denial pattern. Most California trial courts now require in limine motions filed at the Trial Readiness Conference or with the trial brief, and departments with standing orders enforce the deadline. A motion filed the morning of trial gets denied without prejudice to a sidebar objection, which is functionally a loss.
Filing too many is the other failure mode. Departments that see twenty-three numbered MILs from one side deny the boilerplate in bulk and grant only the targeted three or four. Pick the fights that matter and brief them in real depth.
Preservation and the Trial Record
The in limine ruling is interlocutory. If the court grants a defense motion that hurts the plaintiff, the issue is not preserved for appeal absent an offer of proof at trial in the form contemplated by Evidence Code section 354. If the court denies a plaintiff motion and the defense introduces the evidence, the plaintiff must object again contemporaneously at trial to preserve. The Sargenti v. City of Long Beach appellate posture illustrates how preservation gaps at the trial level shape post-trial review even when the substantive issue was correctly identified pretrial.
Build the offer of proof into the motion itself. The trial court reads it, the appellate court reads it, and the record is made before the witness takes the stand.
The in limine docket rewards specificity and punishes scope creep. The plaintiff trial lawyer who files four targeted motions with deposition citations and statutory anchors will win three of them. The lawyer who files twenty-three boilerplate motions will win none of the ones that mattered.