Benfu86 Member 85 Member For: 13y 7m 1d Gender: Male Posted 05/05/12 01:06 PM Share Posted 05/05/12 01:06 PM 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 Link to comment https://www.fordxr6turbo.com/forum/topic/80039-code-p0238/ Share on other sites More sharing options...
Kosij Donating Members 2,045 Member For: 13y 8m 22d Gender: Male Posted 05/05/12 01:32 PM Share Posted 05/05/12 01:32 PM (edited) 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#ixzz1u0ByZ09RPossible 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 PM by Kosij Link to comment https://www.fordxr6turbo.com/forum/topic/80039-code-p0238/#findComment-1232462 Share on other sites More sharing options...
bionicxr6t05 Bronze Donating Members 2,216 Member For: 13y 9m 5d Gender: Male Posted 05/05/12 09:43 PM Share Posted 05/05/12 09:43 PM Is it tuned? Boost spikes cause this code, Link to comment https://www.fordxr6turbo.com/forum/topic/80039-code-p0238/#findComment-1232499 Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 11m 5d Gender: Male Location: @ my laptop Posted 05/05/12 11:30 PM Share Posted 05/05/12 11:30 PM Is your sensor plugged in?Have you extended the wiring loom? if so check for crossed wires or bad connections etc Link to comment https://www.fordxr6turbo.com/forum/topic/80039-code-p0238/#findComment-1232518 Share on other sites More sharing options...
Benfu86 Member 85 Member For: 13y 7m 1d Gender: Male Posted 06/05/12 12:52 AM Author Share Posted 06/05/12 12:52 AM Quote Is it tuned? Boost spikes cause this code,Just pick up car from tuner. Link to comment https://www.fordxr6turbo.com/forum/topic/80039-code-p0238/#findComment-1232551 Share on other sites More sharing options...
Benfu86 Member 85 Member For: 13y 7m 1d Gender: Male Posted 06/05/12 12:55 AM Author Share Posted 06/05/12 12:55 AM Quote Is your sensor plugged in?Have you extended the wiring loom? if so check for crossed wires or bad connections etcPlug in properly. Yes, there is an extended wiring loom from driver to passenger side. Running plazamaman 800hp inter cooler with CAI and BOV. Link to comment https://www.fordxr6turbo.com/forum/topic/80039-code-p0238/#findComment-1232554 Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 11m 5d Gender: Male Location: @ my laptop Posted 06/05/12 03:22 AM Share Posted 06/05/12 03:22 AM Check the orientation of the wiring in the loom, the continuity and terminals etc Link to comment https://www.fordxr6turbo.com/forum/topic/80039-code-p0238/#findComment-1232619 Share on other sites More sharing options...
bionicxr6t05 Bronze Donating Members 2,216 Member For: 13y 9m 5d Gender: Male Posted 06/05/12 04:04 AM Share Posted 06/05/12 04:04 AM 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 Link to comment https://www.fordxr6turbo.com/forum/topic/80039-code-p0238/#findComment-1232635 Share on other sites More sharing options...
Mr_4.0 Member 1,096 Member For: 14y 3m 13d Posted 06/05/12 04:25 AM Share Posted 06/05/12 04:25 AM I get that code if my car overboosts a bit on a cold day. Link to comment https://www.fordxr6turbo.com/forum/topic/80039-code-p0238/#findComment-1232637 Share on other sites More sharing options...
Benfu86 Member 85 Member For: 13y 7m 1d Gender: Male Posted 06/05/12 05:55 AM Author Share Posted 06/05/12 05:55 AM 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? Link to comment https://www.fordxr6turbo.com/forum/topic/80039-code-p0238/#findComment-1232661 Share on other sites More sharing options...
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