Faulty crankshaft position sensor or damaged sensor wiring connector; Worn or damaged crankshaft reluctor wheel (signal ring) teeth; Metal debris or excessive air gap between sensor and reluctor wheel; Open or shorted crankshaft position sensor circuit, including chafed harness near the engine mount; Poor electrical connection at the ECM or corroded sensor pins; Failed ECM driver circuit for the crank sensor (rare but documented on some Toyota engines)

DTC codes / Toyota codes / P1335

P1335 · ToyotaNo Crankshaft Position Sensor Signal Engine Running

Q: What does code P1335 mean?

No Crankshaft Position Sensor Signal Engine Running. P1335 on Toyota vehicles means the engine control module (ECM) lost the crankshaft position signal after the engine had already started and was running. The ECM compares the crank signal with the camshaft position signal and sets this code when the crank signal disappears while the engine is still turning.

P1335 on Toyota vehicles means the engine control module (ECM) lost the crankshaft position signal after the engine had already started and was running. The ECM compares the crank signal with the camshaft position signal and sets this code when the crank signal disappears while the engine is still turning.

SystemPowertrain

Code typeToyota specific

SeverityHigh

Fix difficultyProfessional

AreaIgnition system and misfire

Symptoms you may notice

Engine may stall suddenly or stumble while driving
Hard starting or no-start after the engine has been running
Rough running or misfire just before the engine dies
Tachometer may drop to zero or fluctuate erratically
Often no symptoms besides the warning light if the signal dropout is brief
Reduced power or limp mode in some Toyota models

Common causes, most likely first

Faulty crankshaft position sensor or damaged sensor wiring connector
Worn or damaged crankshaft reluctor wheel (signal ring) teeth
Metal debris or excessive air gap between sensor and reluctor wheel
Open or shorted crankshaft position sensor circuit, including chafed harness near the engine mount
Poor electrical connection at the ECM or corroded sensor pins
Failed ECM driver circuit for the crank sensor (rare but documented on some Toyota engines)

How to diagnose and fix it

Scan all modules and record freeze-frame data to confirm the code was set while the engine was running, not during cranking
Inspect the crankshaft position sensor connector and harness for corrosion, chafing, or loose pins, especially near hot exhaust components
Measure the sensor resistance and compare to Toyota specifications for the engine family, then check the air gap to the reluctor wheel
Use an oscilloscope to capture the crank signal waveform while cranking and running, looking for dropouts, noise, or missing pulses
Remove the sensor and inspect the reluctor wheel for cracked, missing, or contaminated teeth, cleaning any metallic debris
Check continuity and voltage drop on the signal, ground, and shield wires between the sensor and ECM, repairing any open or short
If all wiring and signal tests pass, substitute a known-good crankshaft position sensor and clear the code to verify the repair

Crank signal dropouts that fool good sensors

A crank sensor can pass a resistance test and still drop its signal when hot, so an oscilloscope capture during a road test is often the only way to catch an intermittent P1335.
Toyota reluctor wheels on some engines are pressed onto the crankshaft and can slip or crack without obvious noise, causing a signal that looks like a failed sensor.
Aftermarket crankshaft sensors for Toyota engines frequently have incorrect air gaps or weak magnets, so a new part does not always mean a good part.
A failing camshaft position sensor can set P1335 indirectly because the ECM uses cam and crank correlation to detect a missing crank signal, so always check both signals.
Battery voltage that drops during cranking can cause the ECM to misread the crank signal on early Toyota coil-on-plug engines, so load-test the battery before condemning the sensor.

Can I keep driving with P1335?

Do not continue driving with P1335 because the engine can stall without warning and leave you stranded or cause a loss of power in traffic. Have the vehicle towed or driven only a short distance to a safe repair location, and avoid highways until the fault is repaired.

Tools that help

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Guidance is general and written for Toyota vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.