What does P1771 mean on a Ford?

P1771. Throttle Position Sensor Open Circuit. Applies to F-150, Ranger, Explorer, Mustang.

What causes P1771 on a Ford?

Broken TPS signal wire Unplugged TPS connector Failed sensor with open element Corroded terminals Harness damage

How do I fix P1771 on a Ford?

Reseat the TPS connector Test signal wire continuity Measure sensor resistance through the sweep Repair opens Replace the sensor if the element is open

Code

P1771

Throttle Position Sensor Open Circuit

Category: Powertrain - Fuel/Air Metering
Severity: Check Engine Light
Applies to: F-150, Ranger, Explorer, Mustang
Related: P0121 Throttle/Pedal Position Sensor A Circuit Range/Performance Problem on OBD Codes List

Findings, check these first

Broken TPS signal wire
Unplugged TPS connector
Failed sensor with open element
Corroded terminals
Harness damage

Standard procedure

Reseat the TPS connector
Test signal wire continuity
Measure sensor resistance through the sweep
Repair opens
Replace the sensor if the element is open

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: P1771 Ford definition
live reference page (obdii.pro)
Supports: Ford-family meaning for P1771: THROTTLE POSITION SENSOR CIRCUIT HIGH
Fetched directly. obdii.pro is a publisher independent of the engine-codes family.
P1771 FORD Code: Meaning, Causes, and Symptoms | OBD2 Codes
live reference page (obd2-codes.co)
Supports: Ford meaning for P1771: Throttle Position Sensor Open Circuit
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 P1771. Include your vehicle, the issue and a source if you have one.