P0336 - Crankshaft Position Sensor "A" Performance/Range Problem.
Code P0336 indicates a problem with the crankshaft position sensor (CPS). The DPCV monitors engine speed and controls the engine valves to make sure the pistons are working properly.
The crankshaft sensor transmits important information to the engine control unit (ECU), which allows the controller to adjust fuel injection as well as ignition timing. DPCV, working properly together with the ECU, ensures excellent engine performance.
When the crankshaft sensor fails to provide the correct information to the control unit, a P0336 code is generated.
What does P0336 mean?
Trouble code P0336 indicates that the engine control module (ECM) has detected a malfunction in the crankshaft position sensor A circuit.
The crankshaft position sensor records the crankshaft speed, controls the operation of the engine valves (in particular, the operation of the pistons), as well as the engine itself. The ECM uses information received from the crankshaft position sensor to control fuel injection and ignition timing. The crankshaft position sensor and ECM are required to operate properly to operate your vehicle safely.
The crankshaft position sensor consists of a rotating disc and a stationary sensor. Most crankshaft position sensors have a voltage wire, a ground wire, and a signal wire that allows the ECM to receive a revolutions per minute (RPM) signal.
Using the above information, as well as data received from the camshaft position sensor, the ECM controls the fuel injection process and also regulates ignition timing. If the ECM does not receive or receives an erroneous signal from the crankshaft position sensor, P0336 will be stored in its memory.
The following error codes may also appear with P0336:
- Trouble P0335 - Crankshaft Position Sensor “A” - Circuit Malfunction
- Trouble P0337 - Crankshaft Position Sensor “A” - Low Signal
- Trouble P0338 – Crankshaft Position Sensor “A” – Signal High
- Error P0339 - Crankshaft position sensor “A” - poor electrical contact
Formation conditions
The car's ECU has special protection against false detection of an error; in order to accurately fix it, several factors must coincide on a running engine:
- more than one missed pulse is recorded per revolution;
- complete absence of impulses when rotating the crankshaft.
The presence of pulses or their absence is recorded after 10–100 revolutions of the crankshaft.
The number of pulses depends on the number of teeth on the gear, it varies widely depending on the car model.
The “Check Engine” light does not light up immediately; this is done to minimize cases of false alerts.
Only after several (more than three in a row) repetitions of abnormal situations does the computer record the error and display it on the display screen.
Causes of error P0336
- Worn or damaged gear
- Foreign object in contact with gear
- Short circuit or open circuit of the crankshaft position sensor
- Short circuit, break or damage to the crankshaft position sensor wires
- Corroded or damaged crankshaft position sensor connector
- Misfires in engine cylinders
- Malfunction of the crankshaft position sensor
- Camshaft position sensor malfunction
- ECM malfunction
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