What does the fault code P150200 of GAC Trumpchi mean?
3 Answers
The fault code P150200 in the GAC Trumpchi GS4 indicates a malfunction of the vehicle's crankshaft position sensor. Replacing the crankshaft position sensor will resolve the issue. The function of the crankshaft position sensor is to determine the position of the crankshaft, specifically the crankshaft's angle and the engine's rotational speed. The crankshaft position sensor is typically installed at the front end of the crankshaft (near the pulley), the rear end near the flywheel, or the middle of the crankshaft. In older models, it may also be located inside the distributor. It is one of the most critical sensors in the control system. The functions of the crankshaft position sensor include: detecting the engine speed, hence it is also known as the speed sensor; detecting the top dead center position of the pistons, thus referred to as the top dead center sensor. This includes detecting the top dead center signals for each cylinder used in ignition control and the top dead center signal for the first cylinder used in sequential fuel injection control. Specific steps for replacing the crankshaft position sensor: Locate the crankshaft position sensor in the GAC Trumpchi GS4, use tools to loosen the fixing screws of the sensor, and manually unscrew them. Remove the old crankshaft position sensor from the vehicle. Install the new sensor in the GAC Trumpchi GS4 to complete the process.
When you see the GAC Trumpchi fault code P150200, I usually think it's an issue with the idle control system. This is because the idle air control valve may be stuck or sending abnormal signals, affecting engine speed stability. The most common problems include carbon buildup in the valve, damaged sensors, or poor wiring connections—especially in humid weather when oxidation worsens the fault. I've dealt with similar cases before where owners reported fluctuating RPMs in neutral and noticeable acceleration shuddering. It's recommended to first check if the engine bay is clean, as excessive dust can clog components. If not repaired promptly, fuel consumption may spike, and power delivery could become uneven. Visit a professional shop to use an OBD scanner for specific data readings and rule out other causes like ECU false alarms, since Trumpchi's electronic systems can sometimes be sensitive. Overall, this isn't a major issue, but prolonged neglect affects driving experience and engine longevity—especially during frequent city stop-and-go traffic where it becomes particularly annoying. Owners with mechanical skills can attempt disassembly and cleaning themselves, but beginners shouldn't tamper randomly to avoid damaging additional parts.
The P150200 code reminds me of the trouble I had last time driving a Trumpchi, indicating an idle control issue. The direct symptoms are unstable RPM after starting the car, and severe shaking when the AC is on or at a red light. Common causes are heavy carbon buildup in the idle control valve or a dirty throttle body blocking airflow. From my experience, first observe the symptoms: if the car starts fine when cold but acts up when warm, it likely needs cleaning. A quick temporary fix is adding fuel system cleaner and driving at high speeds to clear carbon deposits, but this is only a band-aid solution. The most reliable approach is taking it to a shop—a technician will check voltage to see if there’s a short circuit, as issues like wiring harness aging or loose connectors are common. Also, regular maintenance is key; replacing air filters and spark plugs can prevent similar problems. Don’t underestimate this code—ignoring it could lead to engine stalling, which is dangerous, especially in rain or at night. In short, spending a little early is better than a costly major repair later.
