Powertrain
generic / SAE
P27A0
Four Wheel Drive (4WD) Range Signal Circuit High
Voltage on the 4WD range signal line is above the expected window. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number7 / A0
Possible causes
- Signal wire shorted to B+ high
- Open sensor element medium
- Connector pins corroded - high contact resistance low
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 120–800 €
- Estimated time: 0.8–3 h
- Component: four wd range sensor
- Component: wiring harness
- MIL / check engine light
Sources
References
sae:J2012