Mercury Fault Codes
On this page you can find the meaning of the fault code you may be seeing coming from your Mercury.
Either choose your model from below or scroll down even further to search and see popular fault codes across all Mercurys.
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Popular Mercury Fault Codes
These are the most popular Mercury fault codes that people are searching for.
Unable To Bleed Up Fuel Tank VacuumLearn More
Lack Of HO2S21 Switch - Sensor Indicates LeanLearn More
Idle Air Control Overspeed ErrorLearn More
Battery Voltage LowLearn More
O2 Sensor Signal Stuck RichLearn More Fixes
Cylinder Head Overtemperature Protection ActiveLearn More
Intake Camshaft Position Actuator Circuit / Open (Bank 1)Learn More Fixes
Intake Camshaft Position Timing - Over-Advanced (Bank 1)Learn More Fixes
Intake Camshaft Position Timing - Over-Retarded (Bank 1)Learn More Fixes
Exhaust Camshaft Position Actuator Circuit / Open (Bank 1)Learn More Fixes
Exhaust Camshaft Position Timing - Over-Advanced (Bank 1)Learn More Fixes
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor ALearn More Fixes
Crankshaft Position Camshaft Position Correlation Bank 1 Sensor BLearn More Fixes
Heated Oxygen Sensor (HO2S) Heater Control Circuit Bank 1 Sensor 2Learn More Fixes
Mass or Volume Air Flow Circuit Low Voltage InputLearn More Fixes
Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance ProblemLearn More Fixes
Intake Air Temperature Circuit High InputLearn More Fixes
Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)Learn More Fixes
O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)Learn More Fixes
O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)Learn More Fixes
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)Learn More Fixes
O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)Learn More Fixes
O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)Learn More Fixes
O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)Learn More Fixes
System Too Lean (Bank 1)Learn More Fixes
System Too Rich (Bank 1)Learn More Fixes
System Too Rich (Bank 2)Learn More Fixes
Random/Multiple Cylinder Misfire DetectedLearn More Fixes
Cylinder 1 Misfire DetectedLearn More Fixes
Cylinder 2 Misfire DetectedLearn More Fixes
Cylinder 3 Misfire DetectedLearn More Fixes
Cylinder 4 Misfire DetectedLearn More Fixes
Cylinder 5 Misfire DetectedLearn More Fixes
Cylinder 6 Misfire DetectedLearn More Fixes
Knock Sensor 1 Circuit (Bank 2 or Single Sensor)Learn More Fixes
Knock Sensor 2 Circuit Low Input (Bank 2)Learn More Fixes
Crankshaft Position Sensor A Circuit MalfunctionLearn More Fixes
Camshaft Position Sensor Circuit Range/PerformanceLearn More Fixes
Exhaust Gas Recirculation Flow Insufficient DetectedLearn More Fixes
Catalyst System Efficiency Below Threshold (Bank 1)Learn More Fixes
Catalyst System Efficiency Below Threshold (Bank 2)Learn More Fixes
Evaporative Emission Control System Incorrect Purge flowLearn More Fixes
Evaporative Emission Control System Leak DetectedLearn More Fixes
Evaporative Emission Control System Vent Control Circuit MalfunctionLearn More Fixes
Evaporative Emission Control System Vent Valve/Solenoid Circuit MalfunctionLearn More Fixes
System Gross Leak Evaporative EmissionLearn More Fixes
Evaporative Emissions System Small Leak DetectedLearn More Fixes
Fuel Level Sensor Circuit High InputLearn More Fixes
Evaporative Emission System High Purge FlowLearn More Fixes
Idle Control System RPM higher Than ExpectedLearn More Fixes
Transmission Control System MalfunctionLearn More Fixes
Post Catalyst Fuel Trim System Too Lean Bank 1Learn More Fixes
Post Catalyst Fuel Trim System Too Rich Bank 1Learn More Fixes
Throttle/Pedal Position Sensor/Switch A / B Voltage CorrelationLearn More Fixes
Throttle/Pedal Position Sensor/Switch D/E Voltage CorrelationLearn More Fixes
Bank 1 Air/Fuel Ratio ImbalanceLearn More Fixes
Mercury was a brand of car manufacturer started and operated by Ford by the original founder’s son. It was designed to offer Ford models at a slightly more upmarket level and was run closely with the even more premium brand Lincoln.
You may find many of the same fault codes appearing between these three brands up until the Mercury was discontinued in 2010.
Common codes such as the P1450 can appear which is when the car is trying to tell you that the fuel tank is overpressured. This can be the result of a faulty fuel pump or valve that is stopping the fuel from entering the engine. This system is in place to avoid fuel vapors entering the atmosphere.
Another common code in Mercury models is the P1151 which is indicative of a lean fuel/air mix at the oxygen sensor in bank 2. A lean fuel/air mix contains too little fuel and too much air. Running the engine in this situation can lead to misfires and a lack of power and possible damage. A faulty sensor can also be the cause of this P1151 issue too.
If you find that the P1506 error code is present when you plug an OBD2 reader into your Mercury then you have a problem with the idle air system. A faulty valve is most probably the culprit here which is struggling to control the air entering the engine while the car is idling.
- Models: 5