C0907 code meaning
TPMS Sensor 4 Battery Low
What C0907 means
C0907 has no public owner: code lists, the NHTSA index and the GM, Saab and Mitsubishi service indexes all lack it. Per its title it flags a fading battery in transmitter 4. How that state is noticed: the sensor measures its cell through a voltage divider and sends a battery byte with each pressure message, as a CM Automotive patent shows. Mitsubishi stores C1940 for tire 4 in this case; once the cell sags further, the receiver stops hearing the sensor and the same family sets C1941 after roughly 20 minutes of driving without its ID. The 2011 Saab 9-4X handles it per corner, subcode 03 under C0750 to C0765. The code thus heralds a coming loss of signal; replacing the sensor before that avoids a dark pressure display.
C0907 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 1.5 hours
- Clears after repairAfter a drive cycle
Symptoms of C0907
- TPMS warning lamp with a sensor fault message
- Later, dashes instead of a value for the affected wheel
Common causes of C0907
- Most likelyTransmitter cell weak from age
- PossibleCold weather pushing an ageing cell below the warning level
- Less likelyFault in the sensor's voltage measurement
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Tpms sensorTpms receiver
What each part of C0907 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 07 | The exact fault in that area. |
What to do next
- Note C0907 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 C0907
What does C0907 mean?
C0907 means "TPMS Sensor 4 Battery Low". C0907 has no public owner: code lists, the NHTSA index and the GM, Saab and Mitsubishi service indexes all lack it. It is a generic code, so it means the same on every make.
Is it safe to drive with C0907?
C0907 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will C0907 fail an emissions test?
C0907 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 C0907 to fix?
Difficulty: medium. A typical repair takes 0.5 to 1.5 hours of work. This is a job for a workshop.
Will C0907 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.