P07A9 — Transmission Friction Element D Stuck On

What Does P07A9 Mean?

P07A9 is a diagnostic trouble code indicating: Transmission Friction Element D Stuck On. This code relates to the transmission system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P07A9

⚠️ Check Engine Light (MIL) illuminated
⚠️ Transmission Friction Element D remains active when it should be off
⚠️ Related system running continuously
⚠️ Harsh or delayed shifting

Common Causes

🔍 Transmission Friction Element D mechanically stuck in active position
🔍 Short circuit holding Transmission Friction Element D control on
🔍 Faulty Transmission Friction Element D driver circuit in ECM/PCM

Frequently Asked Questions

What does P07A9 mean?

P07A9 indicates: Transmission Friction Element D Stuck On. The vehicle's computer has detected that the Transmission Friction Element D is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P07A9?

Only short distances if absolutely necessary. P07A9 affects a critical system and should be diagnosed within a few days to avoid further damage.

How much does it cost to fix P07A9?

Repair costs for P07A9 typically range from $50 to $500, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect Transmission Friction Element D for mechanical binding or debris
🔧 Replace stuck Transmission Friction Element D
🔧 Check Transmission Friction Element D control circuit for short

1
Find your vehicle above
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P07A9: Transmission Friction Element D Stuck On