P050D code meaning
Cold Start Rough Idle
Powertrain system Generic code P05xx codes Check engine light
What P050D means
GM's direct-injection gasoline engines (from about 2016) split the injection into two pulses and retard the ignition after a cold start to heat the catalyst. P050D counts engine cycles with incomplete combustion via the crankshaft misfire detection during this strategy; if the rate reaches the catalyst-damaging misfire threshold, the code sets – once per trip, while the strategy is active (under 45 s running, coolant up to 66 °C). Mostly MIL after two trips, some calibrations without MIL. Ford and FCA do not use P050D.
P050D at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairAfter a drive cycle
Symptoms of P050D
- Check engine light on (depending on calibration)
- Rough idle or jerking in the first seconds after a cold start
- Usually unremarkable when warm
Common causes of P050D
- Most likelyInjector with poor spray pattern or deposits, or injector circuit fault
- PossibleSpark plug or ignition coil weak
- PossibleEngine module software or calibration
- Less likelyPoor fuel or low fuel pressure
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Fuel injectorsIgnition coilsCold start strategyEngine control module
What each part of P050D means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| 0D | The exact fault in that area. |
What to do next
- Note P050D and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P050D
What does P050D mean?
P050D means "Cold Start Rough Idle". GM's direct-injection gasoline engines (from about 2016) split the injection into two pulses and retard the ignition after a cold start to heat the catalyst. It is a generic code, so it means the same on every make.
Is it safe to drive with P050D?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P050D fail an emissions test?
Yes, it can. P050D is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P050D to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P050D clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.