P0335: Crankshaft position sensor A circuit
An OBD-II trouble code for a fault in the circuit of the crankshaft position sensor, which tells the engine computer where the crankshaft is.
How to read it
P0335 is one of the standard OBD-II trouble codes stored when the check engine light comes on. A generic list of OBD-II codes names it “Crankshaft Position Sensor A Circuit”; an FCA US (Chrysler) service bulletin calls it “Crankshaft Position Sensor Circuit”.
Also searched as: code P0335, P0335 code.
Code names follow SAE J2012. Manufacturers add codes of their own, and the same code can have several causes: the vehicle’s service information or a qualified mechanic can say what it means for a particular car.
What the monitor checks
The federal rule’s catch-all covers any other electronic powertrain component that sends input to or takes commands from the on-board computer and has a measurable effect on emissions.
What the manual says to do
Ford’s F-150 manual says that if the indicator stays on, the vehicle should be serviced at the first available opportunity, and that continued driving with it on can mean higher emissions, lower fuel economy, rougher running and more costly repairs.
How the light goes out
Under the federal rule, the check engine light may go out once the fault has not come back during three trips in a row in which its monitor runs without finding it. The system may erase the stored code if the same code has not been registered again in at least 40 engine warm-up cycles.
Read next
- Next in OBD-II trouble codesP0340: Camshaft position sensor A circuit (bank 1 or single sensor)An OBD-II trouble code for a fault in the circuit of the camshaft position sensor on bank 1, or the only one on an engine that has a single sensor.
- The same shape in Accessibility symbolsClosed captioning symbol (CC)CC means closed captioning: the dialogue and other sounds of a programme shown as text on screen, which viewers can turn on or off. It is mainly for people who are deaf or hard of hearing.
More OBD-II trouble codes
The same shape elsewhere
Browse symbols drawn with letters and numbers or squares and rectangles.
Sources
- Generic OBD-II Trouble Codes (scanned reference list), Internet Archive (item generic-and-honda-trouble-codes), P0xxx list
- FCA US service bulletin 18-049-20 (May 2020), Bulletin 18-049-20, FCA US LLC; published by NHTSA, Symptom / condition
- 40 CFR 86.1806-05, On-board diagnostics (2012 edition), 40 CFR 86.1806-05, US Government Publishing Office (Code of Federal Regulations), § 86.1806-05(b) and (c)
- 2020 F-150 Owner's Manual, Ford Motor Company, Instrument Cluster; On-Board Diagnostics (OBD-II)
Researched, edited and approved by Rory Hansen before publishing. Last reviewed September 28, 2026. How we research
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