P0799 Code: Meaning, Symptoms, Causes & Fix

P0799

Overview

Code P0799 indicates a fault in Pressure Control Solenoid C Intermittent, typically within powertrain controls.

Symptoms

  • reduced performance
  • increased fuel use
  • check engine light

Common causes

  • Connector pin fit issue affecting pressure control solenoid c intermittent
  • Temperature/vibration related circuit dropout
  • Connector pin damage/corrosion or harness stress near related components

How to diagnose P0799

  1. Confirm P0799 and capture freeze-frame data with a professional scan tool.
  2. Inspect wiring, connectors, and grounds related to pressure control solenoid c intermittent for obvious defects.
  3. Reproduce the fault with harness movement and heat/vibration checks.
  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 P0799

Moderate: This code is moderate severity: the vehicle may still operate, but fault progression can increase repair cost over time.

Can you drive with P0799?

Most vehicles can be driven short-term with P0799, but postpone heavy load/highway driving until repaired.

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 (intermittent) in the pressure control solenoid c intermittent circuit/system.
  3. Apply the required relearn/adaptation procedure if specified by service information.
  4. Road-test and verify P0799 remains cleared under the conditions that originally set the code.

Fix options

  • Retest after thermal/vibration simulation.
  • Wiggle-test harness during live monitoring.
  • Clear DTCs and verify with live data and completed drive cycle.

Typical repair cost

$200-$900

Common mistakes when diagnosing P0799

  • 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.

P0799 in common vehicles

P0799 appears across makes such as Nissan, Hyundai, Kia, Volkswagen. Failure patterns differ by platform: wiring routes, software calibration, and component supplier revisions can change root cause.

Frequently asked questions

What causes P0799?

P0799 is commonly set by intermittent faults affecting pressure control solenoid c intermittent.

How much does it cost to fix P0799?

For P0799, repair costs are typically $200-$900 depending on exact root cause, labor rates, and part quality.

Can I clear P0799 without repair?

You can clear P0799 temporarily, but the code usually returns until the underlying fault is corrected.

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