C0071 code meaning
2/4 Wheel Drive Status Input
What C0071 means
Covers the input that tells the ABS/ESC module whether the vehicle is in two- or four-wheel-drive mode. Because four-wheel drive links the axles and changes how wheel speeds relate, the stability and ABS strategy must know the current drive mode; this signal comes from the transfer-case switch, the drive-mode selector or a message from the drivetrain controller. The code is set when that status is missing, implausible or inconsistent with observed wheel behaviour. Subaru documents DTC C0071 in the vehicle dynamics control system with revised troubleshooting. A fault can make the module default to a safe strategy, disable some functions and set the ABS/ESC warning lamp while base braking remains. The entry follows the SAE J2012 generic definition and all-wheel-drive mode-signalling design.
C0071 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C0071
- Stability or ABS strategy limited
- ABS/ESC warning lamp on
- Drive-mode display incorrect
Common causes of C0071
- Most likelyTransfer-case or mode switch fault
- PossibleMissing drive-mode message on the bus
- Less likelyHarness or connector fault
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Drive mode switch
What each part of C0071 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 71 | The exact fault in that area. |
What to do next
- Note C0071 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about C0071
What does C0071 mean?
C0071 means "2/4 Wheel Drive Status Input". Covers the input that tells the ABS/ESC module whether the vehicle is in two- or four-wheel-drive mode. It is a generic code, so it means the same on every make.
Is it safe to drive with C0071?
Drive gently and only to a workshop. With C0071 the car can go into limp mode (reduced power) to protect itself.
Will C0071 fail an emissions test?
C0071 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is C0071 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will C0071 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.