VOLVO
ECM-P073700 - TCM engine rpm output circuit. General malfunction information. No information on malfunction type
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
1 modelXC90 (2003–)
Show models by year and engine (1)
What does this fault code mean?
The transmission control module (TCM) can request higher engine speed before a downshift, and the request is sent to the engine control module over the CAN network. It is purely an information code showing that the engine control module has refused the requested speed increase, for example when the vehicle speed is too low.
Possible causes
- The transmission control module (TCM) has requested higher engine speed before a downshift, and the engine control module has not allowed it
What you can do
- 1Because the code is informational it normally does not need remedying. Still check the gear shifts on a test drive
- 2If gear shifting quality is poor, have a workshop read the transmission control module (TCM)
Symptoms you may notice1
- Gear shifting may feel poorer
General guidance for car owners. Diagnosis on the car can point to a different cause.