P078E — Shift Timing Solenoid B Intermittent

What Does P078E Mean?

P078E is a diagnostic trouble code indicating: Shift Timing Solenoid B Intermittent. This code relates to the transmission system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P078E

⚠️ Check Engine Light (MIL) illuminated
⚠️ Shift Timing Solenoid B signal cutting in and out
⚠️ Related system working sometimes but not consistently
⚠️ Harsh or delayed shifting

Common Causes

🔍 Loose or intermittent connection at Shift Timing Solenoid B
🔍 Wire chafing causing intermittent contact
🔍 Shift Timing Solenoid B failing under heat or vibration
🔍 Corroded connector pins with partial contact

Frequently Asked Questions

What does P078E mean?

P078E indicates: Shift Timing Solenoid B Intermittent. The vehicle's computer has detected that the Shift Timing Solenoid B is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P078E?

Only short distances if absolutely necessary. P078E affects a critical system and should be diagnosed within a few days to avoid further damage.

How much does it cost to fix P078E?

Repair costs for P078E typically range from $30 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 and reseat all Shift Timing Solenoid B connectors
🔧 Repair chafed or damaged wiring in Shift Timing Solenoid B circuit
🔧 Replace Shift Timing Solenoid B if failing intermittently

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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.

P078E: Shift Timing Solenoid B Intermittent