C3757 Seat Arona Diagnostic Trouble Code
C3757 Seat Arona code definition:
C3757 is a kind of OBD-II Diagnostic C-Chassis Diagnostic Trouble Code for Seat Arona.
C3757 Seat Arona is defined as Camshaft Position Sensor A Circuit Low. This means the CMP (camshaft position) sensor circuit on engine bank 1 sends an irregular reading. There are two wires dedicated for each coil; one is battery feed which usually comes from the distribution center, and the other one for the coil driver circuit from the PCM. The PCM grounds or ungrounds the circuit to activate or deactivate the coil.
Symptoms
Symptoms of a C3757 Seat Arona diagnostic trouble code may include:
- Possible spark knock (detonation / pre-ignition)
- Poor fuel economy
- The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly
- If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
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Possible Causes :
- Fuel with a large percentage of sulfur will clog the DPF quickly
- The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
- Defective ECU strategies or components will prevent proper regeneration
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Common Misdiagnoses
- IC Circuit High Voltage Problem
- Control Module Throttle Actuator Position Performance Problem
- Air Conditioning (A/C) Clutch Feedback Circuit High Voltage Problem
- Cruise Vehicle Speed/Set Speed Difference Too High Problem
- PCM Stack Overrun Problem
Repair Processes :
Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.
Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications.
Process Tips
Diagnostic trouble code C3757 Seat Arona is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.
Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before C3757 Seat Arona.
Fortunately, C3757 Seat Arona is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.
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