PowertrainP049B
CautionSeverity: Caution - get it checked when you can
EGR 'B' flow insufficient detected
Key terms: Catalytic converter: cleans the exhaust gases · EGR: exhaust gas recirculation, which cuts harmful gases · EVAP: the system that traps fuel vapour · Oxygen sensor: measures oxygen in the exhaust gas · Powertrain: engine, transmission and emissions
1What it means in plain English
This range covers emissions control (EGR, EVAP, oxygen sensors and the catalytic converter), but some manufacturers also use P04 codes for oil-pressure, brake-fluid and coolant-level warnings.
2Common causes
- Clogged or faulty EGR valve
- EVAP system leak (hoses, canister, fuel cap)
- Faulty oxygen sensor
- Ageing catalytic converter
- Low oil, brake fluid or coolant (on some models)
- Wiring or connector fault
3Can I drive?
Do not assume this code is safe to drive. Check the description: if it names oil pressure, brake fluid, coolant, or a brake fault, stop safely and have it diagnosed before driving. Emissions-only codes (EGR, EVAP, catalyst) should still be checked before an emissions or roadworthiness inspection.
This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.
4Brand data 27
| Brand | Code | Description | System |
|---|---|---|---|
| Ashok Leyland CV | P049B | No description available | Powertrain |
| BAIC Motor | P049B | Exhaust Gas Recirculation 'B' Flow Insufficient Detected Brand | Powertrain |
| BYD | P049B | Exhaust Gas Recirculation 'B' Flow Insufficient Detected Brand | Powertrain |
| Chery | P049B | Exhaust Gas Recirculation 'B' Flow Insufficient Detected Brand | Powertrain |
| Daewoo | P049B | No description available | Powertrain |
| DFFS | P049B | Exhaust Gas Recirculation 'B' Flow Insufficient Detected Brand | Powertrain |
| DFFX | P049B | Exhaust Gas Recirculation 'B' Flow Insufficient Detected Brand | Powertrain |
| DFXK | P049B | Exhaust Gas Recirculation 'B' Flow Insufficient Detected Brand | Powertrain |
| EOBD | P049B | EGR 'B' pretok nezadosten zaznan Brand | Powertrain |
| Geely | P049B | Exhaust Gas Recirculation 'B' Flow Insufficient Detected Brand | Powertrain |
| GM | P049B | Exhaust Gas Recirculation 'B' Flow Insufficient Detected Brand | Powertrain |
| Great Wall | P049B | Exhaust Gas Recirculation 'B' Flow Insufficient Detected Brand | Powertrain |
| Hafei | P049B | Exhaust Gas Recirculation 'B' Flow Insufficient Detected Brand | Powertrain |
| Holden | P049B | Exhaust Gas Recirculation (EGR) Flow Incorrect Brand | Powertrain |
| Honda | P049B | This test is used for the confirmation step for Brand | Powertrain |
| Hyundai | P049B | No description available | Powertrain |
| Isuzu | P049B | No description available | Powertrain |
| Land Rover | P049B | DTC -00 may also be stored Brand | Powertrain |
| Opel | P049B | Exhaust Gas Recirculation 'B' Flow Insufficient Detected Brand | Powertrain |
| Peugeot | P049B | No description available | Powertrain |
| Proton | P049B | This test is used for the confirmation step for Brand | Powertrain |
| Saab | P049B | Exhaust Gas Recirculation 'B' Flow Insufficient Detected Brand | Powertrain |
| MG (SAIC) | P049B | Exhaust Gas Recirculation 'B' Flow Insufficient Detected Brand | Powertrain |
| Subaru | P049B | No description available | Powertrain |
| Tata | P049B | No description available | Powertrain |
| Toyota | P049B | EGR 'B' flow insufficient detected Brand | Powertrain |
| Volkswagen | P049B | EGR system bank 2: insufficient flow; No signal/communication Brand | Powertrain |
Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.
5Extended variant codes 4
These 7-character codes are manufacturer-specific variants of P049B and may be reported by some scan tools.
| Brand | Code | Description | System |
|---|---|---|---|
| SsangYong | P049B00 | Low pressure Exhaust Gas Recirculation (EGR) flow low Brand | Powertrain |
| Mercedes-Benz | P049B07 | Der Durchfluss in der Abgasrückführung (Zylinderreihe 2) ist zu gering.Es liegt ein mechanischer Fehler vor. Brand | Powertrain |
| Mercedes-Benz | P049B84 | No description available | Powertrain |
| Sprinter | P049B84 | No description available | Powertrain |
6Related codes
Browse Pxxx codes or P049xx codes.