Powertrain
generic / SAE
P0800
Transfer Case Control System (MIL Request)
The transfer case control module has requested the ECM/PCM to illuminate the MIL because of a fault on its side that is emissions- or driveline-relevant. The original fault is in the transfer case module itself.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number8 / 00
Possible causes
- Internal fault in transfer case module — read its DTCs high
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
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 80–1200 €
- Estimated time: 0.5–4 h
- Component: transfer case module
- MIL / check engine light
Sources
References
sae:J2012