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Interactive Dashboard Simulator
WARNING LIGHTS & OBD-II CODES,
EXPLAINED
Click any warning light below for a full diagnosis guide — or search any OBD-II fault code above
AutoCodeFix · Vehicle Warning Light System
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All Codes
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Engine
52
⚙️
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33
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14
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9
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4
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6
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2
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80
Popular Codes
Showing 21 of 218 codes
All Severity
🔴 Critical
🟡 Moderate
🟢 Minor
P0010
Critical
Camshaft Position Actuator Circuit Open (Bank 1)
The ECM has detected an open circuit in the camshaft position actuator (VVT solenoid) on Bank 1. This controls variable valve timing.
Engine
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P0011
Critical
Camshaft Position Timing Over-Advanced Bank 1
The camshaft timing is more advanced than commanded by the ECM on Bank 1. Often caused by dirty oil or a faulty VVT solenoid.
Engine
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P0012
Critical
Camshaft Position Timing Over-Retarded Bank 1
Camshaft timing is more retarded than expected on Bank 1. Similar causes to P0011 but opposite direction.
Engine
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P0013
Critical
Camshaft Position Actuator Circuit Bank 1 Exhaust
Fault in the exhaust camshaft position actuator circuit on Bank 1. Affects exhaust valve timing.
Engine
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P0014
Critical
Camshaft Position Timing Over-Advanced Exhaust Bank 1
Exhaust camshaft timing is over-advanced on Bank 1.
Engine
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P0015
Critical
Camshaft Position Timing Over-Retarded Exhaust Bank 1
Exhaust camshaft timing is over-retarded on Bank 1.
Engine
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P0016
Critical
Crankshaft/Camshaft Position Correlation Bank 1 Sensor A
The crankshaft and camshaft position signals are out of sync on Bank 1. This indicates a timing issue.
Engine
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P0017
Critical
Crankshaft/Camshaft Position Correlation Bank 1 Sensor B
Exhaust camshaft position signal does not correlate with crankshaft position on Bank 1.
Engine
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P0020
Critical
Camshaft Position Actuator Circuit Bank 2
Electrical fault in the bank 2 intake camshaft VVT actuator circuit.
Engine
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P0021
Critical
Camshaft Position Timing Over-Advanced Bank 2
Bank 2 intake camshaft timing is over-advanced. The cam is advancing beyond the commanded position.
Engine
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P0022
Critical
Camshaft Position Timing Over-Retarded Bank 2
Bank 2 intake camshaft timing is more retarded than commanded.
Engine
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P0087
Critical
Fuel Rail/System Pressure Too Low
The fuel pressure in the fuel rail is lower than commanded. This causes a lean condition and can lead to engine damage.
Fuel System
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P0088
Critical
Fuel Rail/System Pressure Too High
Fuel pressure is higher than commanded, which can cause rich running and injector damage.
Fuel System
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P0089
Critical
Fuel Pressure Regulator Performance
The fuel pressure regulator is not maintaining correct pressure.
Fuel System
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P0090
Critical
Fuel Pressure Regulator Circuit Open
Open circuit in the fuel pressure regulator control circuit.
Fuel System
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P0091
Critical
Fuel Pressure Regulator Circuit Low
Fuel pressure regulator control circuit voltage is too low.
Fuel System
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P0092
Critical
Fuel Pressure Regulator Circuit High
Fuel pressure regulator control circuit voltage is too high.
Fuel System
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P0093
Critical
Fuel System Leak Detected — Large Leak
Major HPFP failure
Fuel System
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P0100
Moderate
Mass Air Flow Circuit Malfunction
The MAF sensor circuit has a general fault. The ECM cannot reliably read airflow into the engine.
Engine
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P0101
Moderate
Mass Air Flow Sensor Range/Performance
The MAF sensor is reading airflow outside of expected range for current engine conditions.
Engine
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P0102
Moderate
Mass Air Flow Circuit Low Input
MAF sensor signal voltage is lower than expected. The ECM thinks less air is entering than actually is.
Engine
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Showing 21 of 218 codes
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