P2577 moderate

Turbocharger Inlet Pressure Sensor Circuit High

The P2577 code means the vehicle's onboard diagnostic system has detected: Turbocharger Inlet Pressure Sensor Circuit High. This is a moderate severity code.

My Garage →
Keep driving?
Short distances only
DIY difficulty
hard
Estimated cost
$200 - $500 (parts and labor)
Recommended Tool
ANCEL AD310 OBD-II Scanner

Best-selling code reader on Amazon. Reads and clears check engine codes on any 1996+ vehicle. Under $30.

Check Price on Amazon

Affiliate link -- we earn a commission at no extra cost to you.

Every Tech Needs This
AstroAI Digital Multimeter

Essential for diagnosing sensor codes, checking voltage, and testing circuits. Under $15 and pays for itself on the first job.

Check Price on Amazon

Affiliate link -- we earn a commission at no extra cost to you.

Common Symptoms

  • Check Engine Light on
  • Erratic boost control
  • Engine may surge under load
  • Reduced engine power message
  • Turbo may overboosting intermittently

Probable Causes (Ranked by Likelihood)

  • Short to power in inlet pressure sensor wiring Very High
  • Defective turbo inlet pressure sensor High
  • Wiring harness damaged by heat near turbo Moderate
  • ECM/PCM fault Low

Step-by-Step Diagnostic Procedure

  1. Read freeze frame data and confirm P2577 is stored

  2. Measure inlet pressure sensor voltage at the PCM connector

  3. Inspect wiring near turbocharger for heat damage or melting

  4. Disconnect sensor and verify voltage drops to confirm short

Frequently Asked Questions

What does P2577 mean?

P2577 means the turbocharger inlet pressure sensor circuit is reading above the maximum expected voltage, usually from a wiring short to power.

Can I drive with a P2577 code?

Drive short distances only. High readings may indicate or mask overboost conditions that could damage the engine.

How much does it cost to fix P2577?

Repairs typically cost $200 to $500. Wiring repair is least expensive, sensor replacement is more common.

Sources

This page is built from documented references. Verify against your own service info before repair work.

Explore More

Search codes Vehicle-specific fixes Guides By make

Was this helpful?

Share carcodefinder.com with a friend who needs to decode their check engine light.

Browse by symptom → Read repair guides → Fixes by vehicle →