What does P1770 mean on a Ford?

P1770. Overrun Clutch Solenoid Valve Malfunction. Applies to F-150, Explorer, E-Series with overrun clutches.

What causes P1770 on a Ford?

Failed overrun clutch solenoid Open or shorted solenoid circuit Sticking overrun valve Contaminated fluid TCM driver fault

How do I fix P1770 on a Ford?

Test solenoid resistance Command the solenoid and verify response Check fluid condition Inspect the circuit Replace the solenoid after command confirmation

Code

P1770

Overrun Clutch Solenoid Valve Malfunction

Category: Powertrain - Transmission
Severity: Check Engine Light
Applies to: F-150, Explorer, E-Series with overrun clutches
Related: P0700 Transmission Control System Malfunction on OBD Codes List

Findings, check these first

Failed overrun clutch solenoid
Open or shorted solenoid circuit
Sticking overrun valve
Contaminated fluid
TCM driver fault

Standard procedure

Test solenoid resistance
Command the solenoid and verify response
Check fluid condition
Inspect the circuit
Replace the solenoid after command confirmation

Code lookup

Type a code above, or start from a symptom or a common code.

Press / to jump to the box. Ford-enhanced powertrain, body, chassis and network codes. Generic P0xxx codes live on OBD Codes List.

Sources and review

Review: checked against the recorded source material.

OBDII.pro: P1770 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for P1770: Clutch Solenoid Circuit Malfunction
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.
P1770 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes
live reference page (obd2-codes.co)
Supports: Ford meaning for P1770: Overrun Clutch Solenoid Valve Malfunction
Fetched directly. obd2-codes.co phrasing matches the engine-codes family, so it counts as one publisher.

Last updated 2026-09-06.

Report a correction for P1770. Include your vehicle, the issue and a source if you have one.