Code Definition

P1340 — CKP/CMP Sensor Signals Out Of Sequence

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Audi

About P1340

P1340 is a manufacturer-specific powertrain diagnostic trouble code recorded for Audi vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1340 is stored, the module has detected a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1340 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The Engine Control Module establishes the engine cycle by comparing the crankshaft position signal, which gives it a precise angular reference from the toothed reluctor wheel, against the camshaft position signal, which tells it which stroke each cylinder is on. The relationship between the reference gap on the crankshaft wheel and the camshaft edge is fixed by the mechanical timing of the engine, and the module checks that relationship continuously. DTC P1340 is stored when the two signals are out of sequence, meaning both are present and electrically healthy but no longer arrive in the corre...

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