P00FA Turbocharger Outlet Pressure Sensor A Circuit Low

The turbocharger outlet pressure sensor A measures the pressure directly at the compressor outlet. It is a separate code family from the boost pressure sensor, which usually measures the pressure just ahead of the throttle; engines use it where the pressure behind the compressor is needed in addition, for example to judge the pressure loss across the charge air cooler or to protect against compressor surge. One manufacturer documents it as a combined temperature and pressure sensor. P00FA means the signal is below its valid range, typically an open circuit, a short to ground or a missing 5 V reference. None of the published manufacturer documents searched uses this code; the explanation follows regulations and comparable manufacturer monitors.

Likely causes

Symptoms

• Check engine light on
• Loss of power or limp mode with boost limitation
• Jerking under load possible

Repair estimate

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

Related codes

References: law.cornell.edu, newtonnet.co.uk, static.nhtsa.gov.