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🟢 SOLVED: Ford Mustang oil cooler gasket leak — oil in coolant — Ford Mustang 2015 | MyCarFault
🟢 SOLVED 80% 1 fix reported · 98 driver confirmations

🟢 Ford Mustang oil cooler gasket leak — oil in coolant

Ford Mustang 2015
On This Page: 🔍 Symptoms ⚙️ Causes 🔧 All Repairs ⚠️ Avoid These 🧾 Driver Reports 🔗 Similar Faults
⚡ Quick Summary
Severity Level
Medium
Safe to Drive?
⚠️ Drive with Caution
Safety Impact
Indirect risk — worth monitoring, not urgent
Urgency Level
🟡 Monitor Closely

Coolant level dropping. Brown murky coolant. Oil floating on coolant reservoir. This fault code is stored when the engine control unit detects a specific fault condition. Common causes include sensor failures, wiring faults, and component wear. Always read additional fault codes before replacing parts — multiple codes together provide a clearer diagnosis. Clear the code after repair and test drive to confirm the fault does not return.

🔍 Symptoms

📍 Ford Mustang GT/EcoBoost

⚙️ Possible Causes

Ford Mustang GT/EcoBoost Possible: Ford Mustang oil cooler gasket: known issue on 2015-2017 5.0 Coyote Mustangs. Oil cooler gasket fails allowing oil into coolant. Signs: brown coolant, oil film in reservoir, coolant loss with no external leak. Ford issued TSB. Fix: oil cooler gasket repla

Repair / Solution

Based on 98 driver confirmations

Ford Mustang oil cooler gasket: known issue on 2015-2017 5.0 Coyote Mustangs. Oil cooler gasket fails allowing oil into coolant. Signs: brown coolant, oil film in reservoir, coolant loss with no external leak. Ford issued TSB. Fix: oil cooler gasket repla 0%
0 worked · 0 did not · ⚪ Unverified

⚠️ Wrong Diagnosis?

No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this Ford Mustang 2015 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.

🧾 Driver Reports

✅ Fixed Ford Mustang oil cooler gasket: known issue on 2015-2017 5.0 Coyote Mustangs. Oil cooler gasket fails allowing oil into coolant. Signs: brown coolant, oil film in reservoir, coolant loss with no external leak. Ford issued TSB. Fix: oil cooler gasket repla

Ford Mustang oil cooler gasket: known issue on 2015-2017 5.0 Coyote Mustangs. Oil cooler gasket fails allowing oil into coolant. Signs: brown coolant, oil film in reservoir, coolant loss with no external leak. Ford issued TSB. Fix: oil cooler gasket replacement $400-800 at shop. Also flush entire cooling and oil system — oil contaminated coolant is very damaging. Check warranty coverage — many resolved under extended powertrain warranty.

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