Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
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A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P1411Cylinder 1 Reactivation Control Performance
Manufacturer communications
6Original wording in English
RAM
"Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● **P0300 - Multiple Cylinder Misfire. ● P0301 - Cylinder 1 Misfire. ● P0304 - Cylinder 4 Misfire. ● P0306 - Cyli…
AUDI
MIL ON (DTC'S P0300, P0411, P1128, P1130, P1411, P1423). THIS COULD BE CAUSED BY A CRACKED OR BROKEN VACUUM HOSE. *KB
VOLKSWAGEN
MALFUNCTION INDICATOR LAMP (MIL) IS ON, DIAGNOSTIC TROUBLE CODES (DTCS) P1411, P1423, SECONDARY AIR INJECTION SYSTEM BANK 1, BANK 2, FLOW TOO LOW ARE STORED IN DTC MEMORY. *TT
PORSCHE
REPLACEMENT SHEETS (SUPPLEMENT) FOR OBD II MANUAL (OBD II) / DME 7.8: FAULT CODES P0410/P0491/P0492/P1411. *TT
Check vehicle applicability
16A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
SAI System Incorrect Downstream Flow Detected
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.