SAP Removal
Secondary Air Pump (SAP) Removal Explained
SAP Removal disables the ECU logic for the Secondary Air Injection system (often called Secondary Air Pump). This system injects fresh air into the exhaust stream during cold start to accelerate catalyst light-off and reduce emissions. When the pump, combination valve, or control solenoid fails, the ECU sets DTCs, triggers a MIL, and may alter startup behavior. The calibration below removes those SAP diagnostics so the vehicle runs normally without SAP-related errors.
When to Use
- After removing or blocking the SAP pump/valve due to failure or custom exhaust setup.
- Recurring DTCs such as P0410, P0411, P0412–P0419 (system/flow/valve/electrical) and readiness failures.
- Track/off-road applications where the secondary air system is no longer required.
- Cold start surge or noise issues linked to SAP operation on tuned engines.
Technical Overview
The SAP subsystem typically includes a pump (electric or belt-driven), a combination/check valve, control solenoids/relays, and ECU diagnostics for flow and circuit integrity. During the first seconds after start, the ECU commands the pump and valve, then verifies airflow via O2 response and pressure/flow plausibility. If components are deleted or faulty, DTCs and readiness flags are set.
- Inputs: coolant/ambient temperature, time since start, O2 sensor feedback, pressure/flow signals (where fitted).
- Outputs: pump/solenoid commands, valve duty, fault timers and plausibility checks.
- Diagnostics: circuit open/short, stuck valve, insufficient flow, O2 reaction missing or delayed.
SAP Removal disables the SAP monitoring and readiness logic while keeping the rest of the emission and drivability strategies intact. It does not modify warm-engine fueling or closed-loop operation.
How It Works
- Assessment: we identify the SAP architecture and the exact DTC set used by your ECU/ID.
- Calibration: we bypass SAP logic and suppress only the necessary SAP-related DTCs/readiness checks.
- Flash & Verify: flash the file with your tool; confirm no SAP faults and normal cold-start behavior.
Compatibility
Supported on many petrol ECUs (Bosch, Siemens/Continental, Delphi, Denso, Magneti Marelli, etc.). Use the live database below to check coverage for your ECU/ID. If it’s missing, send your read and we’ll add support.
SAP — Supported ECU
| Brand | ECU | Instructions |
|---|---|---|
| Aston Martin | ||
| Aston Martin | BOSCH ME17.8.31 | PLUG MUST BE DISCONNECTED |
| Aston Martin | VISTEON EECVI | PLUG MUST BE DISCONNECTED |
| Bentley | ||
| Bentley | BOSCH ME17.1.6 | PLUG MUST BE DISCONNECTED |
| Bentley | BOSCH ME7.1.1 | PLUG MUST BE DISCONNECTED |
| Bentley | BOSCH MG1CS163 | PLUG MUST BE DISCONNECTED |
| BMW | ||
| BMW | BOSCH ME9.2 | PLUG MUST BE DISCONNECTED |
| BMW | SIEMENS MSV80 | PLUG MUST BE DISCONNECTED |
| Chevrolet | ||
| Chevrolet | BOSCH ME7.9.9 | / |
| Chevrolet | DELCO E78 | / |
| Chrysler | ||
| Chrysler | BOSCH ME2.8 | / |
| Dacia | ||
| Dacia | CONTINENTAL EMS3140 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Dacia | CONTINENTAL EMS3141 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Dacia | CONTINENTAL EMS3160 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Dacia | SIEMENS EMS3155 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Ferrari | ||
| Ferrari | BOSCH ME7.3.2 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Ferrari | BOSCH MED9.6.1 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Ford | ||
| Ford | BOSCH MED17.8.10 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Jaguar | ||
| Jaguar | DENSO MB279700 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Ktm | ||
| Ktm | BOSCH MED9.1 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Lamborghini | ||
| Lamborghini | BOSCH MED17.1.1 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Lexus | ||
| Lexus | DENSO | / |
| Maserati | ||
| Maserati | BOSCH ME9.1.1 | PLUG MUST BE DISCONNECTED |
| Mazda | ||
| Mazda | DENSO | PLUG MUST BE DISCONNECTED |
| Mercedes | ||
| Mercedes | BOSCH ME17.7 | / |
| Mercedes | BOSCH ME2.0 | PLUG MUST BE DISCONNECTED |
| Mercedes | BOSCH ME2.7 | PLUG MUST BE DISCONNECTED |
| Mercedes | BOSCH ME2.7.1 | PLUG MUST BE DISCONNECTED |
| Mercedes | BOSCH ME2.7.2 | PLUG MUST BE DISCONNECTED |
| Mercedes | BOSCH ME2.8 | PLUG MUST BE DISCONNECTED |
| Mercedes | BOSCH ME2.8.1 | PLUG MUST BE DISCONNECTED |
| Mercedes | BOSCH ME9.7 | / |
| Mercedes | BOSCH MED17.7.1 | / |
| Mercedes | BOSCH MED17.7.2 | / |
| Mercedes | BOSCH MED17.7.3 | / |
| Mercedes | BOSCH MED17.7.3.1 | / |
| Mercedes | BOSCH MED17.7.5 | / |
| Mercedes | BOSCH MED17.7.7 | / |
| Mercedes | BOSCH MED9.7 | / |
| Mercedes | SIEMENS SIM266 | / |
| Mercedes | SIEMENS SIM271DE | / |
| Mercedes | SIEMENS SIM4LE | PLUG MUST BE DISCONNECTED |
| Mitsubishi | ||
| Mitsubishi | CONTINENTAL EMS3140 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Mitsubishi | CONTINENTAL EMS3141 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Mitsubishi | CONTINENTAL EMS3160 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Nissan | ||
| Nissan | CONTINENTAL EMS3140 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Nissan | CONTINENTAL EMS3141 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Nissan | CONTINENTAL EMS3160 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Porsche | ||
| Porsche | BOSCH ME7.1.1 | / |
| Porsche | BOSCH ME7.8 | / |
| Porsche | BOSCH MED17.1.11 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Porsche | BOSCH MED17.1.6 | / |
| Porsche | CONTINENTAL SDI10.1 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Porsche | CONTINENTAL SDI10.2 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Porsche | CONTINENTAL SDI10.3 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Porsche | CONTINENTAL SDI10.4 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Porsche | CONTINENTAL SDI21.1 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Porsche | CONTINENTAL SDI21.2 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Porsche | CONTINENTAL SDI21.3 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Porsche | CONTINENTAL SDI6 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Porsche | CONTINENTAL SDI6.1 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Porsche | CONTINENTAL SDI8 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Psa (Citroen/Peugeot/Ds) | ||
| Psa (Citroen/Peugeot/Ds) | BOSCH M7.9.5 | / |
| Psa (Citroen/Peugeot/Ds) | BOSCH ME7.4.4 | / |
| Psa (Citroen/Peugeot/Ds) | BOSCH ME7.4.5 | / |
| Psa (Citroen/Peugeot/Ds) | BOSCH ME7.4.6 | / |
| Psa (Citroen/Peugeot/Ds) | BOSCH ME7.4.7 | / |
| Psa (Citroen/Peugeot/Ds) | BOSCH ME7.4.9 | / |
| Psa (Citroen/Peugeot/Ds) | BOSCH ME7.9.52 | / |
| Psa (Citroen/Peugeot/Ds) | BOSCH MED17.4 | / |
| Psa (Citroen/Peugeot/Ds) | BOSCH MED17.4.2 | / |
| Psa (Citroen/Peugeot/Ds) | BOSCH MED17.4.4 | / |
| Psa (Citroen/Peugeot/Ds) | BOSCH MEV17.4 | / |
| Psa (Citroen/Peugeot/Ds) | BOSCH MEVD17.4.2 | / |
| Psa (Citroen/Peugeot/Ds) | BOSCH MEVD17.4.4 | / |
| Psa (Citroen/Peugeot/Ds) | MARELLI IAW6LP | PLUG MUST BE DISCONNECTED |
| Renault | ||
| Renault | CONTINENTAL EMS3140 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Renault | CONTINENTAL EMS3141 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Renault | CONTINENTAL EMS3160 | ACTUATOR PLUG MUST BE DISCONNECTED |
| Smart | ||
| Smart | BOSCH ME17.7 | / |
| Smart | BOSCH ME7.7.0 | / |
| Subaru | ||
| Subaru | DENSO | / |
| Toyota | ||
| Toyota | DENSO | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | ||
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH ME17.5.24 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH ME17.5.26 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH ME7.1 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH ME7.1.1 | / |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH ME7.5 | / |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH ME7.5.10 | / |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH ME7.5.20 | / |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH ME7.5.30 | / |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED17 | / |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED17.1 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED17.1.1 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED17.1.21 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED17.1.27 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED17.1.6 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED17.1.61 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED17.1.62 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED17.1.63 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED17.1.65 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED17.5 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED17.5.2 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED17.5.20 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED17.5.21 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED17.5.23 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED17.5.25 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED17.5.5 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED7.1.1 | / |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED7.5.11 | / |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED9.1 | / |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED9.1.1 | / |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MED9.5.10 | / |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MG1CS001 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | BOSCH MG1CS111 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 3.2A | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 3.3 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 3.3A | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 3.4 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 3.4A | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 3.5 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 3PA | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 3PB | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 3PC | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 3PCA | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 3PD | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 3PE | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 3PG | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 7.1 | / |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 8.1 | / |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 8.21 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 8.23 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 8.33 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 8.4 | / |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 8.5 | PLUG MUST BE DISCONNECTED |
| Vag (Vw/Audi/Skoda/Seat/Cupra) | SIEMENS SIMOS 8.6 | / |
Background reading: Wikipedia – Secondary air injection.
Related services: Exhaust Flap Removal • Cold Start Noise Reduction