P0260 Code: Injection Pump Fuel Metering Control B Signal Intermittent
🟠 Moderate severity · drivable
Drivable, but the signal can cut out, causing sudden rough running or stalling. Fix it soon.
What P0260 means
The engine computer monitors a second fuel metering circuit (circuit B) inside the diesel injection pump. This code means the signal from that circuit drops in and out, so the pump delivers fuel unevenly. Intermittent codes usually point to a loose connection or damaged wiring.
Symptoms
- Check engine light is on
- Engine runs fine sometimes, then rough or stalls
- Hard starting
- Loss of power that comes and goes
- Poor fuel economy
Common causes
- most common: Loose or corroded connector at the injection pump
- common: Damaged wiring with a broken wire or bad ground
- common: Faulty fuel metering component (circuit B) inside the injection pump
- less common: Water or contamination in the connector
- rare: Engine computer fault
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Inspect, clean, and reseat the injection pump connector | Yes | $0–20 |
| Repair the wiring or ground at the injection pump | Mechanic | $50–200 |
| Replace or rebuild the injection pump if the metering component is bad | Mechanic | $1500–4000 |
Frequently asked questions
Can I drive with a P0260 code?
Yes, but the engine may suddenly run rough or stall when the signal drops out. Drive carefully and fix it soon.
What is the most common cause of P0260?
A loose, corroded, or damaged connector and wiring at the injection pump. Intermittent codes are usually electrical connection problems.
Why does my P0260 code come and go?
Because the fault is intermittent — the metering signal works sometimes and drops out at other times, often when the vehicle hits bumps or the wiring moves.
Related codes
P0256
P0256 Code: Injection Pump Fuel Metering Control B Malfunction
P0257P0257 Code: Injection Pump Fuel Metering Control B Out of Range
P0258P0258 Code: Injection Pump Fuel Metering Control B Signal Low
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.