I have this code on my car p0238 saying that turbo/super charger boost A (tc/sbc-a) ckt high. It's a BA T. Anybody has any info about this? Cheers

The boost pressure sensor responds to pressure changes in the intake manifold. This pressure is created by the turbocharger and changes with accelerator pedal position (APP) and engine speed. The engine control module (ECM) uses this information to assist in diagnosis of the barometric pressure (BARO) sensor and to provide engine overboost protection. The boost pressure sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. The engine control module (ECM) supplies 5 volts to the boost pressure sensor on the 5-volt reference 2 circuit, and provides a ground on a low reference circuit. The boost pressure sensor provides a signal to the ECM on a signal circuit relative to the pressure changes. The ECM monitors the boost pressure sensor signal for voltage outside of the normal range. The ECM calculates a predicted value for the boost pressure sensor. The ECM then compares the predicted value to the actual signal.

Read more: http://engine-codes.com/p0238_ford.html#ixzz1u0ByZ09R

Possible causes

- Boost pressure sensor harness is open or shorted

- Boost pressure sensor circuit poor electrical connection

- Faulty boost pressure sensor

- Faulty Turbo/Super Charger

- Engine over temperature.

- Ignition misfire exceeds the calibrated threshold.

- Faulty Knock sensor (KS)

Read more: http://engine-codes.com/p0238_ford.html#ixzz1u0BXjWKz

Edited 05/05/12 01:35 PM05/05/12 01:35 PM by Kosij

Is it tuned? Boost spikes cause this code,

Is your sensor plugged in?

Have you extended the wiring loom? if so check for crossed wires or bad connections etc

Is it tuned? Boost spikes cause this code,

Just pick up car from tuner.

Is your sensor plugged in?

Have you extended the wiring loom? if so check for crossed wires or bad connections etc

Plug in properly. Yes, there is an extended wiring loom from driver to passenger side. Running plazamaman 800hp inter cooler with CAI and BOV.

Check the orientation of the wiring in the loom, the continuity and terminals etc

Prob needs upper limit of that pid increased... Mine did it the other day boost spiked and threw that code... Havent been back to sort it yet

I get that code if my car overboosts a bit on a cold day.

Just read dtc the second time today. It has new code now p0236, turbo/super charger boost a ckt range/performance. What could it be with 2 code on at the same time. Can a modified actuator and ported wastegate cause this or just need to be re-tune?