P006D: Barometric Pressure - Turbocharger/Supercharger Inlet Pressure Correlation Bank 1

Without boost, for example with the engine stopped or at low load, the pressure sensor ahead of the turbocharger or supercharger must read about the same as the barometric pressure sensor. P006D is set when the difference is too large; some manufacturers compare against an estimated barometric value instead and run the check once per ignition cycle. Typical causes are a faulty inlet pressure sensor, a faulty barometric sensor (often inside the control module) or a wiring or reference-voltage fault. Each sensor can be electrically fine on its own; regulations require such plausibility checks for input sensors with a code of their own.

Bank 1 is the side of the engine with cylinder 1. Inline engines only have this bank.

Symptoms

• Check engine light on
• Often no further symptoms
• Reduced boost possible

Most likely causes

• Inlet pressure sensor faulty
• Barometric pressure sensor or control module faulty
• Wiring, connector or 5 V reference faulty
• Clogged air filter lowering pressure ahead of the compressor

What to check, in order

Start with the simplest. You can tick off each step.

1. Check the connector and the pressure port
2. Compare both signals at the same time in live data and check any recent installation work.
3. With the engine off, compare the reading with the atmospheric pressure from the barometric sensor
4. Watch how it changes when starting and accelerating
5. Clean it with a suitable product, or replace it if it does not respond

Good to know

• Repair difficulty: medium
• It affects emissions.

What each character of P006D means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• 0: Subsystem depends on the code range
• 6D: Specific fault in that system

Frequently asked questions

Can I keep driving with code P006D?

You can drive with caution to a repair shop. Avoid demanding power if the car is in limp mode.

What causes code P006D?

The most common causes are: inlet pressure sensor faulty; barometric pressure sensor or control module faulty; wiring, connector or 5 V reference faulty.

Related codes

• P006CMAP - Turbocharger/Supercharger Inlet Pressure Correlation
• P0069Manifold Absolute Pressure - Barometric Pressure Correlation
• P2227Barometric Pressure Sensor A Circuit Range/Performance
• P0236Turbocharger/Supercharger Boost Sensor A Circuit Range/Performance

Sources

• law.cornell.edu: 13 CCR 1968.2
• gsi.ext.gm.com: 14OBDG07 Engine Diagnostics
• static.nhtsa.gov: MC 10073289 2280

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.