Code result
P050D
Cold Start Rough Idle
Moderate severity
What it means
The ECU detects rough idle behaviour during the cold-start phase only. Once the engine has warmed up the issue disappears. Typically caused by injector deposits, low compression on one cylinder when cold, or sticky valve guides.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Injector tip coked - poor cold spray pattern
highOne of the most commonly reported causes for this code — check this first.
Valve guide sticky when cold
mediumA plausible cause — test and verify before replacing parts.
Related help
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