Fuel and air

P00F7 — Barometric vs Turbo Inlet Pressure Correlation, Bank 2

Severity: medium Drive with care, to a shop

What P00F7 means

P00F7 means the engine control module compared the barometric pressure reading with the turbo/supercharger inlet pressure sensor on bank 2 and found they disagree too much. With the engine off or at light load, both should read close to outside air pressure. If they differ, the ECM cannot calculate boost and fueling accurately.

Symptoms

  • Check Engine light on
  • Reduced power or sluggish acceleration
  • Rough idle or hesitation
  • Limp mode with limited boost
  • Poor fuel economy or smoky exhaust

Possible causes

  1. Faulty turbo inlet pressure sensor or barometric sensor (including one built into the ECM)
  2. Damaged, corroded or loose wiring and connectors at the sensors
  3. Intake or vacuum leak on bank 2
  4. Clogged air filter or blocked sensor port or line
  5. Turbocharger or boost control actuator problem
  6. Rarely, an ECM fault

How to diagnose

  1. Scan all codes and freeze-frame data and look for related pressure sensor or boost codes
  2. With the engine off, compare the barometric and turbo inlet pressure readings on a scan tool; they should nearly match
  3. Inspect the air filter, intake hoses, clamps and intercooler for cracks and leaks
  4. Check the sensor connector and wiring for 5 V reference, ground and signal integrity
  5. Watch sensor readings warm and under load and compare with bank 1
  6. Check the sensor port and lines for blockage or oil
  7. Test the turbo and boost actuator, and smoke or pressure test the intake if needed

Common fixes

  • Replace the faulty pressure sensor
  • Repair wiring and clean or replace connectors
  • Fix intake leaks and replace damaged hoses or clamps
  • Replace the air filter and clear the sensor lines
  • Repair or replace the turbocharger if it is the cause

Questions and answers

What does P00F7 mean?

The ECM found that barometric pressure and turbo inlet pressure on bank 2 do not agree. A bad sensor, wiring fault or air leak is the most common reason.

Can I drive with P00F7?

Only briefly and carefully until it is checked. Power may be reduced, and extended driving can harm the turbo and upset the air-fuel mixture.

How do I clear P00F7?

Clearing it with a scan tool only helps temporarily. Find and fix the cause first or the code will return.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.