P0886 — TCM Power Relay Control Circuit Low

What Does P0886 Mean?

P0886 is a diagnostic trouble code indicating: TCM Power Relay Control Circuit Low. This code relates to the transmission system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P0886

⚠️ Check Engine Light (MIL) illuminated
⚠️ TCM Power Relay reading at zero or minimum value
⚠️ Related system not functioning or in fail-safe mode
⚠️ Harsh or delayed shifting

Common Causes

🔍 Open or broken wire in TCM Power Relay circuit
🔍 Poor ground connection at TCM Power Relay
🔍 Faulty TCM Power Relay with no output signal
🔍 Disconnected or loose TCM Power Relay connector
🔍 Blown fuse in related circuit

Frequently Asked Questions

What does P0886 mean?

P0886 indicates: TCM Power Relay Control Circuit Low. The vehicle's computer has detected that the TCM Power Relay is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P0886?

Only short distances if absolutely necessary. P0886 affects a critical system and should be diagnosed within a few days to avoid further damage.

How much does it cost to fix P0886?

Repair costs for P0886 typically range from $20 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

🔧 Repair broken wire or restore ground in TCM Power Relay circuit
🔧 Clean and secure TCM Power Relay connector and ground points
🔧 Replace failed TCM Power Relay

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.

P0886: TCM Power Relay Control Circuit Low