P1255 Code: Meaning, Symptoms, Causes & Fix

Overview

Symptoms

• reduced performance
• increased fuel use
• check engine light

Common causes

• Sensor output out of expected lower range affecting pedal correlation pds2 and lpds low
• Signal pulled low by short-to-ground
• Connector pin damage/corrosion or harness stress near related components

How to diagnose P1255

1. Confirm P1255 and capture freeze-frame data with a professional scan tool.
2. Inspect wiring, connectors, and grounds related to pedal correlation pds2 and lpds low for obvious defects.
3. Compare live data against expected lower threshold and verify ground/reference circuits.
4. Check for related DTCs to identify the root-cause chain before replacing parts.
5. After repair, clear codes and confirm readiness monitors complete without recurrence.

Severity of code P1255

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

Can you drive with P1255?

Most vehicles can be driven short-term with P1255, 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)

1. Repair obvious wiring/connector faults first to prevent repeat parts replacement.
2. Address the root fault mode (low) in the pedal correlation pds2 and lpds low circuit/system.
3. Apply the required relearn/adaptation procedure if specified by service information.
4. Road-test and verify P1255 remains cleared under the conditions that originally set the code.

Fix options

• Repair connector resistance issues.
• Verify ground path and signal integrity.
• Clear DTCs and verify with live data and completed drive cycle.

Typical repair cost

$200-$900

Common mistakes when diagnosing P1255

• 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.

P1255 in common vehicles

P1255 appears across makes such as Mazda, Subaru, Lexus, Jeep. Failure patterns differ by platform: wiring routes, software calibration, and component supplier revisions can change root cause.

Frequently asked questions

What causes P1255?

P1255 is commonly set by low faults affecting pedal correlation pds2 and lpds low.

How much does it cost to fix P1255?

For P1255, repair costs are typically $200-$900 depending on exact root cause, labor rates, and part quality.

Can I clear P1255 without repair?

You can clear P1255 temporarily, but the code usually returns until the underlying fault is corrected.

Helpful tools

• Estimate repair cost
• Decode your VIN
• Calculate fuel cost