What P0404 means
Exhaust Gas Recirculation Circuit Range/Performance
Common causes (general)
Before spending money on parts, verify the code with a scan tool and read freeze frame data. Freeze frame captures every sensor value at the moment the code set — this is often enough to figure out the root cause without further testing.
Manufacturer-specific descriptions
Different manufacturers use this code for slightly different failure modes. Here's what your specific make means by P0404:
| BMW | Exhaust Gas Recirculation Control Circuit Range/Performance |
| FIAT | EGR engine, Electrical fault |
| FORD | EGR Circuit Range/Performance |
| GM | Exhaust Gas Recirculation (EGR) Control Circuit Low Voltage; Exhaust Gas Recirculation (EGR) Control Circuit High Current; Exhaust Gas Recirculation (EGR) Control Circuit Malfunction; Exhaust Gas Recirculation (EGR) Control Circuit Malfunction; Exhaust Gas Recirculation (EGR) Control Circuit Too Few Transitions; Exhaust Gas Recirculation (EGR) Control Circuit Too Many Transitions; Exhaust Gas Reci... |
| HONDA | Exhaust Gas Recirculation (EGR) Control Circuit Range/Performance Problem |
| MITSUBISHI | Exhaust Gas Recirculation Circuit Range/Performance; EGR control valve stuck |
| NISSAN | Exhaust Gas Recirculation Circuit Range/Performance |
| VOLKSWAGEN | Exhaust Gas Recirculation (EGR) Open Position Performance |
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