P0313 Code: Meaning, Symptoms, Causes & Fix

P0313

Overview

Code P0313 indicates a fault in Misfire Detected with Low Fuel, typically within fuel delivery and pressure control.

Symptoms

  • engine may stall at idle
  • hard starting
  • reduced fuel economy

Common causes

  • Signal pulled low by short-to-ground affecting misfire detected with low fuel
  • High circuit resistance
  • Connector pin damage/corrosion or harness stress near related components

How to diagnose P0313

  1. Confirm P0313 and capture freeze-frame data with a professional scan tool.
  2. Inspect wiring, connectors, and grounds related to misfire detected with low fuel for obvious defects.
  3. Compare live data against expected lower threshold and verify ground/reference circuits.
  4. Check for related DTCs to identify the root-cause chain before replacing parts.
  5. After repair, clear codes and confirm readiness monitors complete without recurrence.

Severity of code P0313

High: This code is high severity because the affected system can directly impact drivability, safety, or catalyst/engine protection.

Can you drive with P0313?

Driving with P0313 should be limited to a short trip for diagnosis/repair. Continued driving can cause expensive secondary damage.

If the warning lamp is flashing or drivability/safety is affected, avoid driving and diagnose immediately.

How to fix it (step-by-step)

  1. Repair obvious wiring/connector faults first to prevent repeat parts replacement.
  2. Address the root fault mode (low) in the misfire detected with low fuel circuit/system.
  3. Apply the required relearn/adaptation procedure if specified by service information.
  4. Road-test and verify P0313 remains cleared under the conditions that originally set the code.

Fix options

  • Verify ground path and signal integrity.
  • Replace failed sensor if signal remains low.
  • Clear DTCs and verify with live data and completed drive cycle.

Typical repair cost

$400-$2200

Common mistakes when diagnosing P0313

  • Replacing parts without verifying voltage, ground, and signal integrity first.
  • Ignoring related stored/pending codes that indicate upstream faults.
  • Skipping post-repair verification drive cycle and readiness checks.

P0313 in common vehicles

P0313 appears across makes such as BMW, Mercedes-Benz, Audi, Volvo. Failure patterns differ by platform: wiring routes, software calibration, and component supplier revisions can change root cause.

Frequently asked questions

What causes P0313?

P0313 is commonly set by low faults affecting misfire detected with low fuel.

How much does it cost to fix P0313?

For P0313, repair costs are typically $400-$2200 depending on exact root cause, labor rates, and part quality.

Can I clear P0313 without repair?

You can clear P0313 temporarily, but the code usually returns until the underlying fault is corrected.

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