P0551Low Severity
Vehicle Speed Control and Idle Control System Malfunction (Circuit 0551)
This diagnostic trouble code indicates a malfunction in the associated component circuit.
Common Symptoms of P0551
- Check Engine Light (CEL) Illumination
- Potential decrease in vehicle speed control and idle control system efficiency
- Engine performance issues related to circuit 0551
- Possible stall or rough idle
What Causes the P0551 Code?
- Faulty sensor or actuator in vehicle speed control and idle control system
- Corroded, broken, or shorted wiring harness
- Poor electrical connection
- In rare cases, a failing Engine Control Module (ECM)
How serious is the P0551 code?
Because this code has a low severity level, it is highly recommended to address it promptly. Driving with an active P0551 fault can lead to secondary component failures and decreased fuel economy.
How do you definitively diagnose and fix P0551?
To accurately diagnose the P0551 fault code, you need the exact OEM wiring diagram and diagnostic test procedures for your specific vehicle. Create an Auto Fix Data account to instantly pull the factory diagrams for this fault.
Fix P0551 Now
Access the OEM repair manual and interactive wiring diagram to diagnose this exact code.
- Pin-to-pin wiring diagrams
- Component testing steps
- Technical Service Bulletins
- Identifix confirmed fixes
Related Fault Codes
P0001
Fuel and Air Metering System Malfunction (Circuit 0001)
P0002
Fuel and Air Metering System Malfunction (Circuit 0002)
P0003
Fuel and Air Metering System Malfunction (Circuit 0003)
P0004
Fuel and Air Metering System Malfunction (Circuit 0004)
P0005
Fuel and Air Metering System Malfunction (Circuit 0005)
P0006
Fuel and Air Metering System Malfunction (Circuit 0006)