OBD-II code · Powertrain (generic)
P0737 TCM Engine Speed Output Circuit
A circuit fault on the engine speed value the TCM sends to other modules (rev counter, hybrid module).
Is it safe to drive with P0737?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen in output line
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.6–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Tcm Engine Speed Output
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.