P0977 — Shift Solenoid B Control Circuit High

What Does P0977 Mean?

P0977 is a diagnostic trouble code indicating: Shift Solenoid B Control Circuit High. This code relates to the transmission system. It has been reported in NHTSA complaints across 1 different vehicle models.

Real Owner Reports

From NHTSA complaint database — actual owner descriptions.

"AFTER DRIVING MY NEW CAR FOR 20,000 MILES, THE TRANSMISSION SHIFTS WHILE DRIVING. I NOTICE SHIFTING FROM D TO N THEN TRANSMISSION MAKES SHAKING NOICES. NOTICE THERE ARE ISSUES WITH SOLENOIDS TOO. THE SHIFT D KEEPS FLASHING AND THERE IS A CODE ERROR THAT KEEPS COMMING P0977. EVEN THOUGHT I KEEP M"
— Honda Cr-V owner, 01/01/2015

Source: NHTSA Complaints Database

Most Reported Vehicles for P0977

Based on NHTSA owner complaint data.

#	Vehicle	Reports
1	HONDA CR-V

Frequently Asked Questions

Is it safe to drive with this transmission code?

Use caution. Transmission codes can indicate serious issues that worsen with continued driving. Avoid highway speeds until diagnosed.

Do I need a full transmission rebuild?

Not necessarily. Many transmission codes are caused by solenoids, sensors, or low fluid — which are much cheaper fixes than a rebuild.

How much does a transmission repair cost?

Solenoid replacement: $200-500. Valve body: $500-1,000. Full rebuild: $1,800-3,500. Get a proper diagnosis first.

What To Do Next

Possible Fixes

🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
🔧 Check transmission fluid level and condition; top off or change if needed
🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)

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.

P0977: Shift Solenoid B Control Circuit High