P0345 on Mazda CX-5
Factory diagnostic protocol and troubleshooting wire for fault code P0345 specifically for the Mazda CX-5 (2020–2026, 2.5L Skyactiv-G (187HP) / 2.5L Dynamic Pressure Turbo (256HP)).
1. Symptoms of P0345 on Mazda CX-5
When the Engine Control Module (ECM/PCM) on your Mazda CX-5 (2.5L Skyactiv-G (187HP) / 2.5L Dynamic Pressure Turbo (256HP)) logs fault code P0345, drivers commonly observe:
2. Most Likely Causes on Mazda CX-5
Historical warranty claims and technical repair bulletins for Mazda CX-5 point to the following failure distribution:
3. Step-by-Step DIY Repair Guide for Mazda CX-5
Connect an OBD-II scan tool and record freeze frame sensor telemetry for code P0345 to note engine RPM, load, and voltage when the fault triggered. on the Mazda CX-5 equipped with 2.5L Skyactiv-G (187HP) / 2.5L Dynamic Pressure Turbo (256HP).
Inspect the electrical connector and wiring harness related to P0345 for chafing, corrosion, moisture, or pin push-out. on the Mazda CX-5 equipped with 2.5L Skyactiv-G (187HP) / 2.5L Dynamic Pressure Turbo (256HP).
Measure circuit voltage supply (12V B+ or 5V reference) and sensor/actuator resistance according to factory repair manual specifications. on the Mazda CX-5 equipped with 2.5L Skyactiv-G (187HP) / 2.5L Dynamic Pressure Turbo (256HP).
Install a new OEM-grade replacement part, torque fasteners to factory spec, and ensure electrical locking tabs click firmly. on the Mazda CX-5 equipped with 2.5L Skyactiv-G (187HP) / 2.5L Dynamic Pressure Turbo (256HP).
Clear all stored DTCs from vehicle memory and perform an OBD-II drive cycle to confirm the diagnostic monitor resets to 'Ready'. on the Mazda CX-5 equipped with 2.5L Skyactiv-G (187HP) / 2.5L Dynamic Pressure Turbo (256HP).
Equipment for Diagnosing Mazda CX-5 (P0345)
Mazda CX-5 OEM Replacement Sensor
Direct-fit replacement assembly engineered to OEM tolerances for Mazda CX-5.
AstroAI Auto-Ranging Digital Multimeter
Essential for testing 0.1V–5.0V sensor reference signals, ground continuity (<0.20Ω), and harness resistance.
BlueDriver Bluetooth Pro OBDII Scan Tool
Reads and clears enhanced codes (ABS, Airbag, Transmission, Engine) & live freeze-frame telemetry on phone.
Other Common Fault Codes on Mazda CX-5
Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Mazda CX-5:
4. Mazda CX-5 P0345 FAQs
What causes code P0345 to trigger on a Mazda CX-5?
On the Mazda CX-5 (2.5L Skyactiv-G (187HP) / 2.5L Dynamic Pressure Turbo (256HP)), P0345 is most frequently caused by Defective Bank 2 camshaft position sensor or Broken wiring harness.
Where is the OBD-II port located on my Mazda CX-5?
On the Mazda CX-5, the 16-pin DLC diagnostic connector is located Under driver dashboard, left of steering column. Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.
Can I safely drive my Mazda CX-5 with code P0345?
Caution. Bank 2 cam signal missing. Given that P0345 carries a High severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.