P4000 – EGR System Malfunction

Description

The ECM detects a malfunction in the EGR system.

Need More Than Just the Fault Code?

A diagnostic scanner with live data, freeze-frame information and the right system access can help you investigate the actual cause before replacing parts.

Compare Diagnostic Scanners

Symptoms

  • Rough idle
  • Poor acceleration

Causes

  • Clogged EGR
  • Valve failure

Diagnosis

  • Inspect EGR valve
  • Check passages

Repair

  • Clean or replace EGR valve

Related Problems