code P03AF and P0238?

2016 VOLKSWAGEN PASSAT
142,000 MILES • 1.8L • TURBO • AUTOMATIC
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BHAMDOC1
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If this is the sensor in the boot i removed which goes frim throttle to the air cooler then i cleaned it before i installed it because the hose had some oil in it. Not sure about the other codes or why they popped up. Its one thing after another. Code p03af
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Jul 3, 2026 at 3:29 PM
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STRAILER
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Yes, the sensor in the charge-air hose between the intercooler and throttle body is likely the boost/MAP pressure sensor related to P0238.

P0238 — Turbocharger boost sensor “A” circuit high
P03AF — Cylinder 3 pressure too high

If you cleaned the sensor it can be damaged now, I would replace it and then clear the codes. Let me know what you find.
Jul 4, 2026 at 2:28 PM
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BHAMDOC1
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I replaced the sensor and took it for a hort drive it was fine. Next day drove it to the gym 7 miles was also ok. Then from gym to the tire place down the street and it hesitated/shuttered once and epc light cane on then stayed on and everything was back to normal. No limp mode, drive fine. Not a transmission shudder. Finished from tire place started the car and epc was off. Got home and scanned it there is nothing stored, pending or permanent
Jul 10, 2026 at 10:40 PM
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STRAILER
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  • ASE Certified Mechanic
Glad you could get it fixed, thanks for letting us know.
Jul 11, 2026 at 2:33 PM
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