P1297 on 2009-2018 Volkswagen Tiguan — Pressure Drop Between Turbocharger and Throttle Valve
1 vehicles · 1 makes · $120-$450 repair
Most Reported On
P1297 is an OBD-II diagnostic trouble code meaning “Pressure Drop Between Turbocharger and Throttle Valve.” The engine control module compares the boost pressure the turbocharger should be producing (from the charge-pressure sensor and control model) against the pressure actually arriving at the throttle body, and finds the measured pressure lower than commanded. In VAG scan tools this appears as 17705 - "Pressure Drop between Turbo and Throttle Valve." It is a charge-air leak code: pressurised air is escaping somewhere between the compressor outlet and the intake manifold. It frequently appears together with P0299 (boost underboost). This code is most commonly reported on 2009-2018 Volkswagen Tiguan, with repair costs ranging from $120 to $450.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
P1297 does not use the standard P/B/C/U prefix. It may be a manufacturer-specific code, so verify that a scanner supports your exact year, model and module before buying.
FAQ
What does P1297 mean?
P1297 stands for "Pressure Drop Between Turbocharger and Throttle Valve." The engine control module compares the boost pressure the turbocharger should be producing (from the charge-pressure sensor and control model) against the pressure actually arriving at the throttle body, and finds the measured pressure lower than commanded. In VAG scan tools this appears as 17705 - "Pressure Drop between Turbo and Throttle Valve." It is a charge-air leak code: pressurised air is escaping somewhere between the compressor outlet and the intake manifold. It frequently appears together with P0299 (boost underboost).
What are the most common causes of P1297?
The most common causes of P1297 are: Torn diverter/bypass valve diaphragm (very common on VAG 2.0T TSI and 1.8T), Cracked or split plastic charge pipes, intercooler hoses, or turbo outlet elbow, Ruptured PCV / crankcase breather diaphragm or cracked breather hoses, Loose or failed hose clamp or O-ring at a charge-pipe joint, Leaking intercooler end tank, Faulty boost pressure control valve N249 or wastegate actuator, Failed charge-pressure sensor giving a false low reading. The specific cause varies by vehicle.
How much does it cost to fix P1297?
Repair costs for P1297 range from $120 to $450, depending on the vehicle and root cause.
Which vehicles are affected by P1297?
Au7o has documented P1297 across 1 vehicle models from 1 manufacturers: Volkswagen.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.