Turbo Trouble? What the P003A, P2262, P00AF, and P0299 Codes Mean for Your 6.7 Cummins

If you're seeing codes like P003A, P2262, P00AF, or P0299 on your 6.7 Cummins, you're not alone—and it's likely your turbo is trying to tell you something.

Whether you drive a Ram 2500, 3500, or HD workhorse, these codes all point toward a common issue: turbocharger or actuator malfunction. Here’s a breakdown of what they mean, what causes them, and how to fix the problem—so you can get back to full boost.

Most Common Turbo Codes on a 6.7 Cummins

What Each Code Means and What to Check

P003A Code 6.7 Cummins

Meaning: Actuator boost control position sensor is outside its expected range.

Fix: Check or replace the actuator; inspect wiring and sensor connectors.

P2262 Code 6.7 Cummins

Meaning: Boost pressure not detected when expected.

Fix: Likely a stuck actuator, bad boost sensor, or leaking boost pipes.

P00AF Code 6.7 Cummins

Meaning: Turbocharger vane position not within expected range.

Fix: This usually means your actuator is sticking or your turbo vanes are gunked up.

P0299 Code 6.7 Cummins / P0299 Cummins 6.7

Meaning: Underboost condition—turbo isn’t generating enough power.

Fix: Faulty actuator is the most common cause, but it can also be a result of cracked intercooler pipes, leaky boots, or a damaged turbo.

Symptoms of Turbo Actuator Issues

• Reduced acceleration or power
• Engine goes into limp mode
• Poor fuel economy
• High EGTs (Exhaust Gas Temperatures)
• Whining or unusual turbo noise

How to Fix It

1. Inspect Your System

- Check boost sensor

- Inspect actuator wiring

- Pressure test your intercooler piping

2. Replace the Turbo Actuator

A faulty VGT actuator is a common cause.Replace the actuator with a quality VGT Turbo Actuator to resolve the issue.

3. Upgrade the Whole System

If you’ve had repeated turbo issues, consider upgrading the entire setup with something more reliable.

One proven solution is our 3rd Gen Swap Kit for the 6.7 Cummins. It eliminates the problematic VGT system entirely and replaces it with a fixed-geometry S300 turbo for better power and reliability—especially great for deleted trucks or heavy towing.

Ready to upgrade? Check out our 3rd Gen Turbo Swap Kit for 6.7 Cummins—engineered to eliminate common VGT issues and restore real performance.

If you're battling codes like P003A, P2262, P00AF, or P0299 on your 6.7 Cummins, don't ignore them. Start by checking sensors and connectors. If problems persist, replacing the actuator or upgrading your system with a proven solution like our 3rd Gen Swap can save you time, money, and headaches.

Frequently Asked Questions

What does the P003A code mean on a 6.7 Cummins?

The P003A code on a 6.7 Cummins means the turbo actuator's boost control position sensor is reporting outside of its normal range. This is often caused by a faulty actuator or position sensor and can lead to reduced power and limp mode.

What causes a P0299 code on a 6.7 Cummins?

The P0299 code on a Cummins 6.7 typically indicates low turbo boost pressure. This can be caused by a malfunctioning turbo actuator, intake system leaks, or turbocharger damage. It's one of the most common codes for actuator failure.

Can I fix the P2262 code without replacing the turbo on my 6.7 Cummins?

In some cases, yes. The P2262 code often relates to the turbo boost not building properly. Before replacing the turbo, inspect the actuator, wiring harness, and boost sensor. Cleaning or replacing the actuator can often resolve the issue.

Want to go deeper? Check out our guide on what causes high EGT on the 6.7 Cummins and how to avoid damaging your turbo.