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Mercury Mountaineer Fault Codes

You can find common Mercury Mountaineer fault codes on this page that when clicked take you to a detailed description.

You can also type in the fault code you are getting below to find a more detailed description.

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Mercury Mountaineer Recalls

When a car manufacturer detects a problem with a model they put out a recall notice and more often than not offer to fix the problem free of charge.

You can check to see if your Mercury Mountaineer has any recall notices on our sister site AutoRecalls.co, sorted by model year.

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Common Mountaineer Fault Codes

These are the most common Mountaineer fault codes that people are searching for.

Severity Icon 7/10

Error Icon P0401

Exhaust Gas Recirculation Flow Insufficient Detected

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Severity Icon 6/10

Error Icon P0020

Intake Camshaft Position Actuator Circuit / Open (Bank 2)

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Severity Icon 7/10

Error Icon P0193

Fuel Rail Pressure Sensor Circuit High Input

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Severity Icon 8/10

Error Icon P0106

Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem

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Error Icon P0125

Insufficient Coolant Temperature for Closed Loop Fuel Control

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Severity Icon 5/10

Error Icon P0175

System Too Rich (Bank 2)

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Severity Icon 8/10

Error Icon P0305

Cylinder 5 Misfire Detected

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Severity Icon 3/10

Error Icon P0456

Evaporative Emissions System Small Leak Detected

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Error Icon P0457

Evaporative Emission Control System Leak Detected

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Severity Icon 6/10

Error Icon P0174

System Too Lean (Bank 2)

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Severity Icon 7/10

Error Icon P0171

System Too Lean (Bank 1)

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Severity Icon 9/10

Error Icon P0011

Intake Camshaft Position Timing - Over-Advanced (Bank 1)

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Severity Icon 7/10

Error Icon P0420

Catalyst System Efficiency Below Threshold (Bank 1)

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Severity Icon 3/10

Error Icon P0442

Evaporative Emission Control System Leak Detected

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Severity Icon 9/10

Error Icon P0300

Random/Multiple Cylinder Misfire Detected

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Severity Icon 8/10

Error Icon P0340

Camshaft Position Sensor Circuit Malfunction

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Error Icon P0316

Misfire Detected On Startup (First 1000 Revolutions)

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Severity Icon 7/10

Error Icon P0430

Catalyst System Efficiency Below Threshold (Bank 2)

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Error Icon U1900

CAN Communication Bus Fault

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Severity Icon 8/10

Error Icon P0304

Cylinder 4 Misfire Detected

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Severity Icon 4/10

Error Icon P0455

System Gross Leak Evaporative Emission

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Error Icon P1000

System readiness test not complete

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Error Icon P1299

Cylinder Head Overtemperature Protection Active

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Error Icon P1450

Unable To Bleed Up Fuel Tank Vacuum

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Error Icon P1401

DPFE Circuit High Input

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Error Icon P1700

Transmission Indeterminate Failure (Failed to Neutral)

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Error Icon P1131

Lack Of HO2S Switch - Sensor Indicates Lean

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Error Icon P1151

Lack Of HO2S21 Switch - Sensor Indicates Lean

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Error Icon P1506

Idle Air Control Overspeed Error

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Error Icon B1318

Battery Voltage Low

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Severity Icon 7/10

Error Icon P2196

O2 Sensor Signal Stuck Rich

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Severity Icon 7/10

Error Icon P0010

Intake Camshaft Position Actuator Circuit / Open (Bank 1)

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Severity Icon 9/10

Error Icon P0012

Intake Camshaft Position Timing - Over-Retarded (Bank 1)

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Severity Icon 7/10

Error Icon P0013

Exhaust Camshaft Position Actuator Circuit / Open (Bank 1)

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Severity Icon 8/10

Error Icon P0014

Exhaust Camshaft Position Timing - Over-Advanced (Bank 1)

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Severity Icon 8/10

Error Icon P0016

Crankshaft Position Camshaft Position Correlation Bank 1 Sensor A

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Severity Icon 8/10

Error Icon P0017

Crankshaft Position Camshaft Position Correlation Bank 1 Sensor B

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Severity Icon 4/10

Error Icon P0036

Heated Oxygen Sensor (HO2S) Heater Control Circuit Bank 1 Sensor 2

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Severity Icon 4/10

Error Icon P0102

Mass or Volume Air Flow Circuit Low Voltage Input

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Severity Icon 8/10

Error Icon P0113

Intake Air Temperature Circuit High Input

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Severity Icon 4/10

Error Icon P0128

Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)

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Severity Icon 6/10

Error Icon P0131

O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)

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Severity Icon 7/10

Error Icon P0134

O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)

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Severity Icon 6/10

Error Icon P0135

O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

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Severity Icon 4/10

Error Icon P0137

O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)

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Severity Icon 6/10

Error Icon P0138

O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)

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Severity Icon 6/10

Error Icon P0141

O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)

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Severity Icon 5/10

Error Icon P0172

System Too Rich (Bank 1)

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Severity Icon 8/10

Error Icon P0301

Cylinder 1 Misfire Detected

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Severity Icon 8/10

Error Icon P0302

Cylinder 2 Misfire Detected

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Severity Icon 8/10

Error Icon P0303

Cylinder 3 Misfire Detected

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Severity Icon 8/10

Error Icon P0306

Cylinder 6 Misfire Detected

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Severity Icon 3/10

Error Icon P0325

Knock Sensor 1 Circuit (Bank 2 or Single Sensor)

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Severity Icon 8/10

Error Icon P0332

Knock Sensor 2 Circuit Low Input (Bank 2)

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Severity Icon 8/10

Error Icon P0335

Crankshaft Position Sensor A Circuit Malfunction

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Severity Icon 6/10

Error Icon P0341

Camshaft Position Sensor Circuit Range/Performance

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Severity Icon 3/10

Error Icon P0441

Evaporative Emission Control System Incorrect Purge flow

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Severity Icon 3/10

Error Icon P0446

Evaporative Emission Control System Vent Control Circuit Malfunction

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Severity Icon 4/10

Error Icon P0449

Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction

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Severity Icon 5/10

Error Icon P0463

Fuel Level Sensor Circuit High Input

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Severity Icon 3/10

Error Icon P0496

Evaporative Emission System High Purge Flow

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Severity Icon 3/10

Error Icon P0507

Idle Control System RPM higher Than Expected

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Severity Icon 9/10

Error Icon P0700

Transmission Control System Malfunction

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Severity Icon 7/10

Error Icon P2096

Post Catalyst Fuel Trim System Too Lean Bank 1

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Severity Icon 6/10

Error Icon P2097

Post Catalyst Fuel Trim System Too Rich Bank 1

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Severity Icon 9/10

Error Icon P2135

Throttle/Pedal Position Sensor/Switch A / B Voltage Correlation

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Severity Icon 9/10

Error Icon P2138

Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation

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Severity Icon 7/10

Error Icon P219A

Bank 1 Air/Fuel Ratio Imbalance

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