OBD-II trouble code
P0258: Injection Pump Fuel Metering Control "B" Low (Cam/Rotor/Injector)
SAE J2012 APR2002: metering control B low. The less-than-10-ohm short test that was found is on a P0251 chart for one actuator. The printed pair is diagnosis only.
Quick facts
- System
- Powertrain
- Category
- Fuel & Air
- Severity
- High severity
- Drivable
- No — stop driving until repaired
- Repair cost range
- $125 – $183 (check engine light diagnosis and testing, labor only; the diesel injection pump is outside this pair)
- DIY difficulty
- Advanced DIY
Browse every code in P0200–P0299, or start from the full code library.
What does P0258 mean?
SAE J2012 APR2002 names P0258 Injection Pump Fuel Metering Control "B" Low (Cam/Rotor/Injector). Circuit low is measured with that control connected. P0253 is letter A's low row, not the mirror of this code. The mirror on letter B is P0259, circuit high. Section 3.8 does not locate B.
The resistance directions in the Chrysler reprints — less than 10 ohms passes an open and fails a short to ground — belong to the actuator those reprints name under P0251. They are worth knowing so they are not reversed, and they are not a reason to ohm channel A's plug when P0258 is stored. If the VIN chart gives B its own driver and return, the same directional English applies only after those wires are identified: open-circuit pass is less than 10 ohms end to end; short-to-ground fail is less than 10 ohms to battery negative; module disconnected; ignition off. Greater than 1 volt is the external-voltage fail and is P0259's kind of result. An unplugged pin at zero volts, module still connected, is not the short.
No wiring total was found. The pump average of $2,630–$4,034 was searched and is outside the diagnosis pair. Do not open high-pressure fuel. Depressurize before a low-pressure fitting is opened.
Common causes
- A below-range reading on control B with the control connected
- A short to ground on the B wire the diagram names
- An open in that wire, which is a different measurement from the short
Symptoms
- P0258 stored
- The low result present with control B connected
- No K-number on this page, because the reprints do not assign those numbers to B
- P0253 stored on channel A, which is the other low code
Diagnostic steps
- 1.Pick the B connector from the diagram. P0253's actuator is not the default.
- 2.Ignition off, module disconnected, B unplugged, before resistance. Open check: less than 10 ohms is intact, and only if the VIN chart uses that threshold. Short to ground: less than 10 ohms is the fail. Do not swap those sentences.
- 3.Leave greater than 1 volt on the high-voltage steps.
- 4.Do not treat a floating low pin, module connected, as the short. That skips the disconnect the reprints use on channel A, and B still needs its own chart.
- 5.The printed pair is diagnosis. The pump price was searched and is not a B-low wire.
- 6.Do not open a high-pressure fitting. Depressurize a low-pressure connection before it is opened.
- 7.Verify in the bay with B connected, key on, engine off.
Repair cost
$125 – $183 (check engine light diagnosis and testing, labor only; the diesel injection pump is outside this pair)
RepairPal's check engine light diagnosis and testing, updated 3 September 2026, is $125–$183 labor. The printed pair is that figure. No parts-and-labor total was found for a channel-B short to ground. Diesel injection pump replacement is $2,630–$4,034 nationally and $3,384–$7,376 on the Ram 3500 line, which lists other year lines. It was searched and is outside the pair. A fuel filter at $258–$322 was searched and is not this electrical step.
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DIY vs shop
This is an advanced DIY job. It typically requires specialty tools, scan-tool access, lifting equipment, or careful sequencing to avoid causing new failures. Plan for extended downtime and have a backup vehicle. Most owners are better served by a shop that has done this repair before.