P1247 Code: Meaning, Symptoms, Causes & Fix

Overview

P1247 is triggered when monitoring logic identifies an issue with Turbo Boost Pressure Low affecting air metering and throttle control.

Symptoms

engine feels underpowered
surging or unstable idle
occasional limp mode

Common causes

High circuit resistance affecting turbo boost pressure low
Signal pulled low by short-to-ground
Connector pin damage/corrosion or harness stress near related components

How to diagnose P1247

Confirm P1247 and capture freeze-frame data with a professional scan tool.
Inspect wiring, connectors, and grounds related to turbo boost pressure low for obvious defects.
Compare live data against expected lower threshold and verify ground/reference circuits.
Check for related DTCs to identify the root-cause chain before replacing parts.
After repair, clear codes and confirm readiness monitors complete without recurrence.

Severity of code P1247

Moderate: This code is moderate severity: the vehicle may still operate, but fault progression can increase repair cost over time.

Can you drive with P1247?

Most vehicles can be driven short-term with P1247, but postpone heavy load/highway driving until repaired.

If the warning lamp is flashing or drivability/safety is affected, avoid driving and diagnose immediately.

How to fix it (step-by-step)

Repair obvious wiring/connector faults first to prevent repeat parts replacement.
Address the root fault mode (low) in the turbo boost pressure low circuit/system.
Apply the required relearn/adaptation procedure if specified by service information.
Road-test and verify P1247 remains cleared under the conditions that originally set the code.

Fix options

Repair connector resistance issues.
Replace failed sensor if signal remains low.
Clear DTCs and verify with live data and completed drive cycle.

Typical repair cost

$180-$900

Common mistakes when diagnosing P1247

Replacing parts without verifying voltage, ground, and signal integrity first.
Ignoring related stored/pending codes that indicate upstream faults.
Skipping post-repair verification drive cycle and readiness checks.

P1247 in common vehicles

P1247 appears across makes such as Ford, Toyota, Honda, Chevrolet. Failure patterns differ by platform: wiring routes, software calibration, and component supplier revisions can change root cause.

Frequently asked questions

What causes P1247?

P1247 is commonly set by low faults affecting turbo boost pressure low.

How much does it cost to fix P1247?

For P1247, repair costs are typically $180-$900 depending on exact root cause, labor rates, and part quality.

Can I clear P1247 without repair?

You can clear P1247 temporarily, but the code usually returns until the underlying fault is corrected.