OBD-II code · Powertrain (generic)
P0654 Engine RPM Output Circuit Open
The engine RPM signal output that the ECU sends to other modules (tachometer, transmission, ABS) has an open circuit.
Is it safe to drive with P0654?
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 wiring
- Less likelyPin pushed back out of connector body
- Less likelyCracked solder joint inside the module or sensor
Symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.2 h
- Emissions test
- Usually unaffected
- Parts involved
- Engine Rpm Output
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.