Parts for your 2011 Mazda Cx-5-Map sensor

2011 Mazda CX-5 MAP Sensor: Is it fitted, what it does, and how to look after it

Yes, the 2011 production Mazda CX‑5 (first model year released in many markets as 2012) uses a MAP sensor. Mazda’s factory workshop manual for the CX‑5 documents a Manifold Absolute Pressure (MAP) sensor on both the SKYACTIV‑G 2.0 petrol and the turbocharged SKYACTIV‑D 2.2 diesel engines. Mazda technical training materials describe it as monitoring intake manifold pressure for load calculation, EGR/boost control and OBD checks, and it’s commonly associated with diagnostic codes like P0106–P0109 and, on diesels, boost‑pressure DTCs. These references come from Mazda’s CX‑5 Workshop Manual (2012–2016) and Mazda Global Training for SKYACTIV‑G and SKYACTIV‑D systems.

On this CX‑5, the MAP sensor keeps the engine control unit honest about what’s happening under the bonnet. In the petrol, it works alongside the MAF to validate engine load, help manage EGR and stabilise fueling and ignition at different altitudes and throttle openings. In the diesel, it’s a core player for boost control, making sure the turbo doesn’t over‑ or under‑shoot target pressure. When the MAP sensor goes out of whack, drivers can see poor fuel economy, doughy throttle response, rough idle, a sooty exhaust on diesels, or a check‑engine light.

There’s no strict replacement interval, but it’s smart to check the sensor during regular servicing (for example at air filter changes or every 20,000–30,000 kilometres). A quick visual once‑over for cracked wiring, loose connectors and oil/soot build‑up in the intake goes a long way. Diesel EGR systems can pass a bit of soot, that can settle around the MAP port and skew readings.

If cleaning is needed, use an electronics‑safe sensor cleaner and go easy—no abrasive brushing, no compressed air into the port, and definitely no harsh solvents. Let it dry completely before refitting. If the CX‑5 keeps logging MAP‑related codes (P0106–P0109) or boost pressure faults after checks for vacuum leaks or split hoses, replacement is usually the fix. Genuine or quality aftermarket units from reputable suppliers play nicest with Mazda ECUs.

Replacement is straightforward: disconnect the connector, remove the retaining fastener, lift the sensor straight out, and fit the new unit with a fresh O‑ring. Seat it squarely and snug the fastener to spec per the workshop manual. Clear codes and road‑test, on diesel models, watch requested vs actual boost on a scan tool to confirm it’s all sweet.

• Common symptoms: sluggish acceleration, rough idle, higher fuel use, black smoke (diesel), check‑engine light.
• Basic checks: intake hoses for splits, connector corrosion, oil/soot at the sensor port, and MAF readings for plausibility.

Popular questions

Where is the MAP sensor on a 2011/2012 Mazda CX‑5?
On the SKYACTIV‑G 2.0 petrol, it’s typically mounted on or near the intake manifold close to the throttle body. On the SKYACTIV‑D 2.2 diesel, it’s fitted to the intake manifold or charge pipe area, positioned to read boost pressure downstream of the intercooler and EGR mixing point. Access is under the bonnet and usually requires basic hand tools.

Can a dirty MAP sensor be cleaned or should it be replaced?
Light contamination can often be cleaned with electronics‑safe sensor cleaner. Avoid touching the sensing element and let it dry fully. If faults persist, or the sensor’s readings are implausible compared with a scan tool’s barometric and MAF‑based load data, replacement is the reliable choice.

What fault codes point to MAP issues on a CX‑5?
Common MAP‑related codes include P0106 (range/performance), P0107 (low input), P0108 (high input) and P0109 (intermittent). On diesels, boost control codes such as P0236–P0242 can also be involved. Always check for split hoses or intake leaks before condemning the sensor.