In the past, when I have diagnosed a stored code P0338, it was due to the powertrain control module (PCM) detecting a high input voltage signal from the crankshaft position (CKP) sensor. CKP sensors monitor engine speed (RPM) and crankshaft position. The position of the crankshaft is used by the PCM to calculate ignition spark timing.

Jun 14, 2020 · What are the common symptoms of OBDII code P0338 (Crankshaft Position Sensor 'A' Circuit High Input)? - Common symptoms include engine misfires, rough idling, stalling, and difficulty starting the vehicle.

Jul 27, 2017 · What Does Code P0338 Mean? Three things are needed for the engine to run: air, fuel, and spark. To run well, the ECM (engine control module) precisely meters how much fuel to inject for the measured mass of air at any given moment, and then deliver a spark to ignite a power stroke, hundreds of times per second.

Oct 18, 2022 · Your vehicle might log a P0338 trouble code when the engine computer detects an issue with the crankshaft position sensor. The P0338 trouble code can trigger a no-start condition if left unresolved. Aside from an illuminated check engine light, stalling, unusual RPM readings, and poor engine performance are common symptoms of a logged P0338.

P0338 code indicates high circuit condition in Crankshaft Position Sensor A, affecting engine performance. Symptoms include engine stalling, rough idling, and difficulty starting. Causes may include faulty sensor, wiring issues, or alternator problems. Diagnosis involves testing sensor integrity and checking for wiring damage.

Feb 4, 2025 · What does the P0338 code mean? The P0338 code is a diagnostic trouble code (DTC) that indicates an issue with the crankshaft position sensor A circuit. This sensor plays a vital role in monitoring the position and rotational speed of the crankshaft.

P0338 is an OBDII Diagnostic Error Code referring to “Crankshaft Position Sensor A Circuit High Input.” According to this code, an elevated voltage signal was detected from the crankshaft position sensor A circuit by the ECU of the engine.

Jul 7, 2017 · P0338故障码，适用于所有汽车制造商，意思是曲轴位置（CKP）传感器A电路高(Crankshaft Position Sensor A Circuit High)。 提示：快速查找故障码，可以关注“ 车主指南 ”公众号，回复故障代码，如：“ P0338 ”，即可获得对应故障码解释和解决方案。

Jun 14, 2020 · How to Fix the DTC P0338? Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins …

Code P0338 will be set if the PCM detects high voltage coming from the crankshaft positioning sensor. Other crankshaft sensor fault codes include P0336 and P0337. P0338 fault codes can be found on vehicles made by Opel, GM and Peugeot.