What do P0335 and P0336 together mean?

Treat the pair as a clue that the engine computer recorded an issue with the crankshaft-position signal or its plausibility—not as confirmation that the crankshaft-position sensor is bad. For a specific Ford monitor description, P0335 means no crankshaft signal was detected. P0336 can be recorded when a camshaft signal is present but a crankshaft signal is not, when the detected tooth count is incorrect, or when the time between teeth seems implausible. These are definitions for the covered Ford application, not universal descriptions or a diagnosis for every vehicle. [S1]

The two codes do not, by themselves, identify the cause. The appropriate interpretation depends on the exact vehicle and its applicable service information. Share the year, make, model, engine, whether each code is current or stored, and any available freeze-frame information with a qualified diagnostic professional.

No—not on the strength of the code pair alone. The Ford description distinguishes a missing signal from certain signal or synchronization plausibility conditions, but it does not establish that a failed sensor caused either code. It also does not tell you which checks or repair apply to your particular vehicle. [S1]

Before authorizing parts, ask the professional to explain what vehicle-specific evidence supports the proposed cause and how the applicable service information guides the next diagnostic step. You can ask whether the codes are current, what the scan record shows for the event, and whether other recorded information changes their interpretation. Avoid treating a code description as a parts-replacement instruction.

Write down the year, make, model, and engine as shown in the vehicle paperwork or information you already have. Record both codes exactly as displayed, including whether your scanner labels each one current, pending, or stored; if it uses different wording, copy that wording rather than guessing. Save any available freeze-frame information for the professional to review.

You can also describe, in your own words, what you noticed and when, without trying to diagnose it. If you have no freeze-frame details or do not know the engine, say so; those are useful gaps to identify, not reasons to invent an answer.

Ask how the meaning of each code applies to your exact vehicle, which service information the professional is using, and what evidence would distinguish a missing signal from an implausible signal or synchronization concern. You can also ask what the scan record does and does not establish, what the next diagnostic step is, and what evidence would support any recommended repair. The Ford source describes possible monitor interpretations for its covered application; it does not establish a cause, universal test procedure, or repair for your vehicle. [S1]

Copyable note:

“Vehicle: [year, make, model, engine]. Codes: P0335 [scanner status] and P0336 [scanner status]. Freeze-frame information available: [details or not available]. What I noticed: [brief observation and when]. Please explain how the codes apply to this vehicle, what evidence supports the next diagnostic step, and what would confirm a proposed repair.”

Keep the note factual and let the qualified professional determine which checks are appropriate.