Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
When you start your car in the morning, it might shake or feel bumpy for a little while. This code means the car's computer noticed that it wasn't running smoothly when it first started.
The P050D code indicates that the engine control module (ECM) has detected a rough idle condition during a cold start.
P050D is a diagnostic trouble code (DTC) for a rough idle condition detected by the ECM when the engine is started cold. This can be caused by a variety of issues including air/fuel mixture problems, ignition system faults, or mechanical engine issues.
• Engine shakes or vibrates when started cold
• Check Engine Light is on
• Poor fuel economy
• Faulty spark plugs or ignition coils
• Vacuum leaks
• Fuel injector problems
ECM: Engine Control Module, the computer that controls engine functions.
DTC: Diagnostic Trouble Code, a code stored by the ECM when it detects a problem.
• Check for any other diagnostic trouble codes.
• Inspect spark plugs and ignition coils for wear or damage.
• Check for vacuum leaks in the intake system.
• Replace faulty spark plugs or ignition coils.
• Repair any vacuum leaks.
• Clean or replace fuel injectors.
• OBD-II scanner
• Spark plug wrench
• Vacuum gauge
$150 - $500
Moderate
• Chevrolet Silverado
• Ford F-150
• Toyota Camry
• Regular maintenance and tune-ups
• Use high-quality fuel
• Replace air filters regularly
Engine Performance
• Avoid hard acceleration when the engine is cold.
• Allow the engine to warm up before driving.
Check with your vehicle manufacturer or dealership for warranty coverage on engine components.
This code has been associated with cold weather conditions affecting engine performance, especially in vehicles with high mileage.
Moderate – It should be addressed soon to prevent further engine issues.
Driving with an engine performance issue can lead to increased emissions and may be against local regulations.
• Engine must be cold.
• Vehicle should be started after sitting overnight.
The components related to this code, such as spark plugs and ignition coils, are located in the engine compartment.
Q: Can I drive my car with a P050D code?
A: Yes, but it's best to get it checked soon to avoid further issues.
Q: Will a P050D code cause my car to fail emissions testing?
A: It might, as it can affect the engine's performance and increase emissions.
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Universal · Digital multimeter
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Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Commonly relevant for misfire, ignition-efficiency, and some drivability-related repairs.
Misfire and ignition-related faults commonly involve spark plugs as part of the repair path.
Check the correct plug type, gap, and engine application for your vehicle.
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Fitment Required · Vehicle-fitment part
Relevant when the fault points toward ignition-coil performance or cylinder-specific ignition issues.
Some ignition faults involve coil performance or cylinder-specific coil problems.
Match the coil to your engine and confirm the failed component before ordering.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.