What causes fault code P006B?

• Most likely: Clogged or cracked tube/hose to the Exhaust Gas Pressure (EGP) sensor (soot buildup) • Likely: Faulty Exhaust Gas Pressure (EGP) sensor • Possible: Faulty MAP sensor or restricted intake manifold (sludge/carbon buildup) • Rare: Wiring issues (high resistance or oxidation in connectors)

Powertrain (Engine & Gearbox)Standard EOBD

P006B - MAP - Exhaust Pressure Correlation

Q: What are the symptoms of fault code P006B?

• Check Engine Light (MIL) illumination • Reduced engine power / Limp mode • Hesitation during acceleration or erratic idle • Increased fuel consumption • Forced DPF regeneration issues

Q: How do you fix fault code P006B?

STEP 1: Inspect the tube connecting the exhaust manifold to the EGP sensor. Carbon blockage is the primary cause. Clean or replace the tube. STEP 2: Inspect the MAP sensor tip for soot or oil contamination. Clean carefully with MAF/Electronics cleaner. STEP 3: Use a scan tool to monitor MAP, Exhaust Pressure, and Barometric Pressure with Key On Engine Off (KOEO). All should be approximately 100 kPa / 14.7 psi. Replace the diverging sensor. STEP 4: Verify 5V reference and ground at both sensors. Signal voltage at atmospheric pressure should typically be between 0.5V and 1.0V. STEP 5: Clear codes and perform a test drive while monitoring live data for correlation under load.

Last updated:1 February 2026

Related:MAP-sensor, Avgasmottryckssensor (EGP/EBPS), Barometertryckssensor, Turbocharger, Wiring Harness

System

Powertrain (Engine & Gearbox)

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P0000

No Diagnostic Trouble Codes (DTC) Present

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P0002

Fuel Volume Regulator Control Circuit Range/Performance

P0003

Fuel Volume Regulator Control Circuit Low

Technical Description

P006B is a correlation code triggered when the Engine Control Unit (ECU) detects an implausible deviation between the Manifold Absolute Pressure (MAP) sensor and the Exhaust Gas Pressure (EGP) sensor signals. During Key On Engine Off (KOEO) conditions, both sensors should report atmospheric pressure (approx. 101 kPa). If the difference exceeds a calibrated threshold (typically >1.5 psi / 10 kPa), the ECU flags a correlation error. This affects boost control strategies and EGR flow calculations, often resulting in Limp Mode.

Possible Causes

Clogged or cracked tube/hose to the Exhaust Gas Pressure (EGP) sensor (soot buildup)

Faulty Exhaust Gas Pressure (EGP) sensor

Faulty MAP sensor or restricted intake manifold (sludge/carbon buildup)

Wiring issues (high resistance or oxidation in connectors)

Symptoms

Check Engine Light (MIL) illumination

Reduced engine power / Limp mode

Hesitation during acceleration or erratic idle

Increased fuel consumption

Forced DPF regeneration issues

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P006B - MAP - Exhaust Pressure Correlation

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P006B - MAP - Exhaust Pressure Correlation

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Technical Description

Possible Causes

Symptoms

Recommended Solution

Workflow

Mechanic's Tip

Do you also have other fault codes?

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