P1556 Code - Charge Pressure Negative Deviation
Quick Answer
P1556 indicates Charge Pressure Negative Deviation. Common causes include External leak on intake or exhaust side, Faulty Charge Air Pressure Sensor, Faulty Wastegate Regulator Valve. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1556 indicates Charge Pressure Negative Deviation.
- Common causes
- Common causes include External leak on intake or exhaust side, Faulty Charge Air Pressure Sensor, Faulty Wastegate Regulator Valve.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1556 Description
What are the Possible Causes of the DTC P1556?
- External leak on intake or exhaust side
- Faulty Charge Air Pressure Sensor
- Faulty Wastegate Regulator Valve
- Fualty Turbocharger
How to Fix the DTC P1556?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1556 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P1556 code?
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Need Help with the Code?
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Information for Specific Makes
- P1556 Audi — Charge Pressure Negative Deviation
- P1556 BMW — Camshaft Position Actuator 'A' Control Open Circuit Bank 1
- P1556 Lexus — Reactor Temperature Sensor Circuit High
- P1556 MINI — Camshaft Position Actuator 'A' Control Open Circuit Bank 1
- P1556 Toyota — Reactor Temperature Sensor Circuit High
- P1556 Volkswagen — Charge Pressure Negative Deviation
Frequently Asked Questions about P1556 Code
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