P073C on 2019-2023 Mercedes-Benz A-Class (A220) — Transmission Stuck In Gear 7 / Gear 7 Engagement Fault
1 vehicles · 1 makes · $200-$3,000 repair
How to diagnose and fix P073C: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Mercedes-Benz A-Class · 2019–2023
The 7G-DCT dual-clutch transmission develops a shudder during low-speed acceleration, similar to driving over rumble strips. The clutch packs overheat in stop-and-go traffic, causing judder and vibration during engagement.
Common Symptoms
- Shudder during 1st-2nd gear acceleration
- Vibration at low speeds similar to rumble strips
How to Fix
Update the DCT software to the latest calibration. In persistent cases, the clutch assembly may need replacement. Avoid prolonged creeping in traffic — use the brake instead of riding the clutch at low speed.
Owner tips & cautions
- TipUse Sport mode or manual mode in heavy traffic. This delays upshifts and keeps the DCT from hunting between 1st and 2nd gear, reducing clutch wear.
Sources for this issue (2)
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P073C code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P073C mean?
P073C stands for "Transmission Stuck In Gear 7 / Gear 7 Engagement Fault." This powertrain code relates to the transmission being unable to properly disengage or commanded gear control, generally indicating it is stuck in 7th gear (or cannot leave gear 7 as commanded). It is part of a family of newer transmission gear-engagement codes used on multi-speed automatics. The transmission computer detected that the actual gear state did not match what it commanded. This can cause harsh operation, limited gear range, or limp mode, and warrants prompt diagnosis to avoid further transmission damage.
What are the most common causes of P073C?
The most common causes of P073C are: Faulty shift solenoid or valve body fault, Low or contaminated transmission fluid, Stuck or worn valve body passages, Internal mechanical fault (clutch/clutch pack), Wiring or connector fault in the transmission circuit, Faulty transmission control module. The specific cause varies by vehicle.
How much does it cost to fix P073C?
Repair costs for P073C range from $200 to $3,000, depending on the vehicle and root cause.
Which vehicles are affected by P073C?
Au7o has documented P073C across 1 vehicle models from 1 manufacturers: Mercedes-Benz.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.