C0670 code meaning
Left Front Acceleration or Position Sensor Circuit
What C0670 means
C0670 is absent from the publicly available J2012 lists, but GM assigns it in its electronic damping control. In Saab's 2011 workshop data for the 9-5 and 9-4X it covers the vertical acceleration sensor at the left front wheel, which the suspension module supplies with 5 V and which answers with 0.5 to 4.5 V. Subcode 02 sets when the signal remains below 0.5 V longer than 1.5 s, 05 when it remains above 4.5 V as long, and 0A when it changes too rarely for 2.5 s above 30 km/h. Variable damping is then switched off until the next ignition cycle and a suspension warning appears. GM bulletin PI0954 names C0670 among five accelerometer codes on the 2010 LaCrosse with real-time damping when a service sensor meets an early controller. Nothing public ties the code to the park brake; C0675 is the right-hand twin.
C0670 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 2.5 hours
- Clears after repairAfter a drive cycle
Symptoms of C0670
- Service suspension message in the instrument cluster
- Adaptive damping inactive, firmer or less controlled ride
Common causes of C0670
- Most likelyWheel acceleration sensor, its 5 V supply or signal wire faulty
- PossibleReplacement sensor not compatible with early suspension module (GM PI0954)
- PossibleCorroded or loose connector at the wheel housing
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Vertical acceleration sensorSuspension control moduleSensor wiring
What each part of C0670 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 70 | The exact fault in that area. |
What to do next
- Note C0670 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 C0670
What does C0670 mean?
C0670 means "Left Front Acceleration or Position Sensor Circuit". C0670 is absent from the publicly available J2012 lists, but GM assigns it in its electronic damping control. It is a generic code, so it means the same on every make.
Is it safe to drive with C0670?
Drive gently and only to a workshop. With C0670 the car can go into limp mode (reduced power) to protect itself.
Will C0670 fail an emissions test?
C0670 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 C0670 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will C0670 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.