OBD-II Diagnostic Trouble Code
C2107 — Tire Pressure Monitoring System (TPMS) Battery Low
C2107 indicates a TPMS sensor battery is low. The sensor reports its battery status and the module detected low battery. Definitions vary by OEM.
Severity 1/5
Truck-relevant
Drive on
Severity
Drive on
Tire Pressure Monitoring System (TPMS) Battery Low
Code
C2107
Category
Chassis
Subsystem
Brakes
Truck-relevant
Yes
What this means for truckers
Low severity on a Cummins X15, Detroit DD15, PACCAR MX-13. The vehicle is safe to drive to your next planned stop. Address at your next regular service.
Before you replace parts — try this first
C2107 on the Brakes system is most often old tpms sensor battery — not a dead part. On commercial diesels especially, work these in order before spending money on parts:
- Confirm the symptoms. Match what your truck is doing to the Symptoms section below. If the code is set but the symptoms are not there, clear the code and re-test after a drive cycle — it may not return.
- Clean and dry the sensor connector. Water, road salt, or oil seeping into a connector is the #1 fake sensor failure. Disconnect, look for green corrosion or moisture, spray with electrical contact cleaner, dry, reseat. Many faults clear here for $0.
- Inspect the wiring harness. Trace the wire from the sensor toward the ECM — look for chafing against the engine block, melted insulation near the turbo or exhaust, or pinch points where a clamp has rubbed through.
- Test the sensor before swapping it. Most Common Causes (below) list the expected voltage or resistance range — a $20 multimeter saves a $300 sensor swap that does not fix the problem.
- Only then, replace the part. Use the OEM or a tier-1 aftermarket. Cheap sensors throw the same code in two weeks.
Symptoms
TPMS lamp on or flashing, and the tire pressure reading may be missing for one wheel.
Common causes
- CommonOld TPMS sensor battery ($80–$250)
- OccasionalCold temperatures reducing battery output ($0–$50)
- OccasionalDamaged sensor ($80–$250)
- RareModule fault ($200–$600)
How to fix
Identify which sensor reports low battery with a TPMS tool
When to use: First step
Replace the TPMS sensor
When to use: Battery low
Relearn sensors
When to use: After replacement
Check the module
When to use: All sensors report low
Affects most
No specific vehicle pattern found in our complaint database. This code can appear on any vehicle that supports OBD-II diagnostics.
Related
Frequently Asked Questions
Can I drive with code C2107?
Yes — C2107 is severity 1. The vehicle is safe to drive to your next planned stop. Address at your next regular service. The check engine light will stay on until the underlying issue is fixed and the ECM monitors clear.
How much does it cost to fix C2107 on a commercial truck?
Total repair cost ranges varies depending on the root cause. The cheapest fix is usually the first one listed below — Old TPMS sensor battery — which is also the most common. On commercial trucks the cost is usually higher than passenger vehicles due to part availability and shop labor rates ($120–185/hour at most truck shops, vs $90–130 at general auto shops). DIY-capable fixes (sensors, hoses, filters) are at the low end; major component replacements (turbo actuator, high-pressure fuel pump, transmission solenoid pack) are at the high end. Always diagnose with a scan tool BEFORE replacing parts — guessing wrong on a $1,500 turbo actuator when the actual issue was a $30 boost hose is a common expensive mistake.
Will C2107 fail a DOT inspection?
C2107 is generally not a direct DOT inspection fail item by itself. Inspectors focus on safety-critical systems (brakes, steering, tires, lights, hours-of-service). However, the check engine light alone can trigger additional inspection scrutiny. Best practice: fix the code and clear it before a planned inspection.
What's the difference between C2107 and related codes?
C2107 is closely related to: C2106 (Pressure Loss / Tire Pressure Low (TPMS)). These codes share the same subsystem (brakes) and often appear together. If you see this code, scan for the full code list — fixing the root cause usually clears multiple companion codes at once. If only C2107 is set without the companions, the issue is more isolated.
How do I prevent C2107 from coming back after a repair?
For C2107 (Tire Pressure Monitoring System (TPMS) Battery Low), prevention centers on the brakes system. Clean wheel speed sensors at every brake service. Inspect tone rings for cracks or rust. Keep ABS sensor harnesses away from chafe points. Don't drive through deep water that can flood the rear wheel-speed sensor connectors.