OBD-II code · Powertrain (generic)
P0898 Transmission Control System MIL Request Circuit Low
Voltage on the transmission control system MIL request circuit is below the expected window. Wire shorted to ground or driver low.
Is it safe to drive with P0898?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyWire shorted to ground
- PossibleDriver fault low
- Less likelyConnector pins corroded - high contact resistance
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
- Best left to a mechanic
- Typical labour
- 0.5–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Mil Request Circuit, Tcm
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.