What does Mazda P1345 mean?

Mazda code P1345: No CMP or SGC Signal. It relates to the powertrain on Mazda vehicles.

Can P1345 be turned off in the ECU?

DTC removal is possible for off-road/motorsport use after the underlying fault or hardware change (e.g. DPF/EGR removal). Safety-critical codes should be fixed, not suppressed.

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Mazda P1345

No CMP or SGC Signal

What P1345 means on a Mazda

On Mazda vehicles, P1345 is logged when the ECU detects a fault in the powertrain: “No CMP or SGC Signal”. P1345 is a manufacturer-specific Mazda code (the "1" after the letter marks an OEM-defined code), so its meaning applies to Mazda and may differ on other makes.

Common causes & symptoms

Typical triggers for a powertrain code like P1345 include faulty or ageing sensors, wiring/connector faults, a clogged or removed component, or a value drifting outside the ECU's expected window. Symptoms range from a check-engine light only, to limp mode, rough running, higher consumption or failed emissions tests.

P1345 and ECU tuning

When a Mazda has had hardware changed for off-road/motorsport use (for example a removed DPF or EGR), the related monitor must be disabled in the ECU map or the code re-appears. Softechpro Solutions performs DPF/EGR/AdBlue/DTC off and recalculates the checksum, so codes like P1345 stay cleared after the flash. Genuine faults should always be repaired, not just hidden.

Related Mazda codes

P1309 P1312 P1318 P1319 P1351 P1352 P1353 P1354

Need to clear P1345 after a delete?

Softechpro Solutions does DPF/EGR/AdBlue/DTC off + checksum for 260+ ECU families — from €98.99/mo.

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