DTC P1337

DTC: P1337 Engine speed signal TNA not transmitted from engine control module

Activation requirement CHECK ENGINE lamp:
Two consecutive trips with fault.

Activation of CHECK ENGINE lamp:
At start of next trip.

Test to detect fault:
The engine control module transmits the engine speed signal TNA to the diagnostic module. Thereby, the engine control module's output is checked for electrical function and a message is sent via CAN if a fault occurs. The diagnostic module recognizes a fault if problems occur for longer than approximately 2 seconds.