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Ford Focus Fault Codes


You can find common Ford Focus 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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Do you know the fault code already? Enter it in the box below and hit "Search Codes".

Ford Focus 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 Ford Focus has any recall notices on our sister site AutoRecalls.co, sorted by model year.

View Ford Focus Recalls »
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Error Icon P1450

Sec.Air Inj.Sys.Circ Short to B+

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Severity Icon 7/10

Error Icon P0420

Catalyst System Efficiency Below Threshold (Bank 1)

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Severity Icon 7/10

Error Icon P0171

System Too Lean (Bank 1)

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Error Icon P2002

Diesel Particulate Filter Efficiency Below Threshold Bank 1

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Error Icon B1601

PATS Received Incorrect Key-Code From Ignition Key Transponder

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Error Icon B1202

Fuel Sender Circuit Open

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Severity Icon 8/10

Error Icon B1342

ECU Is Defective

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Error Icon B1998

Passenger Sid, Side mount Airbag Circuit Open

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Error Icon B1600

PATS Ignition Key Transponder Signal Is Not Received

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Error Icon B1877

Seatbelt Driver Pretensioner Circuit Open

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Error Icon B1318

Battery Voltage Low

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Error Icon C1288

Pressure Transducer Main / Primary Input Circuit Failure

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Severity Icon 6/10

Error Icon P0141

O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)

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Error Icon U1900

CAN Communication Bus Fault

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Severity Icon 7/10

Error Icon P2196

O2 Sensor Signal Stuck Rich

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Error Icon P0400

Exhaust Gas Recirculation Flow Malfunction

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Severity Icon 9/10

Error Icon P0299

Turbo / Super Charger Underboost

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Severity Icon 3/10

Error Icon P0456

Evaporative Emissions System Small Leak Detected

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Error Icon P1518

Main Relay Circ.

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Severity Icon 9/10

Error Icon U0100

Lost Communication With ECM/PCM "A"

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Error Icon U2005

Audio Rear Integrated Control Panel Unit is Not Responding

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Error Icon U0140

Lost Communication With Body Control Module

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Severity Icon 7/10

Error Icon U0155

Lost Communication With Instrument Panel Cluster (IPC) Control Module

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Severity Icon 9/10

Error Icon U0001

High Speed CAN Communication Bus

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Severity Icon 9/10

Error Icon U0073

Control Module Communication Bus "A" Off

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Error Icon U1262

SCP (J1850) Communication Bus Fault

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Error Icon P0850

Park / Neutral Switch Input Circuit

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Error Icon P0902

Clutch Actuator Circuit Low

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Error Icon P0460

Evaporative Emission Control System Pressure Sensor Malfunction

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Severity Icon 7/10

Error Icon P219A

Bank 1 Air/Fuel Ratio Imbalance

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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 8/10

Error Icon P0606

ECM/PCM Processor Fault

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Severity Icon 8/10

Error Icon P0106

Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem

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Severity Icon 8/10

Error Icon P0301

Cylinder 1 Misfire Detected

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Severity Icon 7/10

Error Icon P0010

Intake Camshaft Position Actuator Circuit / Open (Bank 1)

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Error Icon P0480

Cooling Fan 1 Control Circuit Malfunction

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Error Icon P0365

Camshaft Position Sensor B Circuit (Bank 2)

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Severity Icon 7/10

Error Icon P0380

Glow Plug/Heater Circuit A Malfunction More details...

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Error Icon P0500

Vehicle Speed Sensor Malfunction

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Error Icon P0047

Turbocharger/Supercharger Boost Control 'A' Circuit Low

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Severity Icon 8/10

Error Icon P0113

Intake Air Temperature Circuit High Input

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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 P0303

Cylinder 3 Misfire Detected

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Error Icon P0443

Evaporative Emission Control System Purge Control Valve circuit Malfunction

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Error Icon P0720

Output Speed Sensor Circuit Malfunction

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Error Icon P0628

Fuel Pump A Control Circuit Low

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Error Icon P0691

Fan 1 Control Circuit Low

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Error Icon P0571

Cruise Control/Brake Switch A Circuit Malfunction

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Error Icon P0231

Fuel Pump Secondary Circuit Low

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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 6/10

Error Icon P0341

Camshaft Position Sensor Circuit Range/Performance

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Error Icon P0702

Transmission Control System Electrical

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Error Icon P0715

Input/Turbine Speed Sensor Circuit Malfunction

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Error Icon P0882

TCM Power Input Signal Low

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Error Icon P0156

O2 Sensor Circuit Malfunction (Bank 2 Sensor 2)

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Severity Icon 8/10

Error Icon P0340

Camshaft Position Sensor Circuit Malfunction

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Severity Icon 4/10

Error Icon P0411

Secondary Air Injection System Incorrect Flow Detected

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Severity Icon 8/10

Error Icon P0087

Fuel Rail/System Pressure - Too Low

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Error Icon P1299

Cylinder Head Temperature Sensor Detected Engine Overheating Condition

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Error Icon P1285

Fuel Inj.Air Contr.Valve

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Error Icon P1000

System readiness test not complete

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Error Icon P1289

Turbocharger bypass

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Error Icon P1120

O2 Sensor Heater Circ. Bank 2-Sensor 1 Open

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Error Icon P1406

EGR Temp.Sensor Range/Performance

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Error Icon P1246

Needle Lift Sensor

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Error Icon P1412

EGR Different Pressure Sensor Signal too Low

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Error Icon P1622

Engine coolant temperature

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Error Icon P1632

Accelera.Pedal Pos.Sensor

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Error Icon P1132

O2 Sensor Heating

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Error Icon P1260

Theft Detected - Engine Disabled

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Error Icon P1300

Misfire detected Reason: Fuel level too low

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Severity Icon 6/10

Error Icon P0135

O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

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Error Icon P1233

Fuel Pump Driver Module off-line

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Error Icon P1131

Bank 2-Sensor 1 Internal

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Ford Focus Image
  • Manufacturer: Ford

About the Focus

The Focus first entered the market in 1998 as a compact family car. The primary intention of the model was for Ford to release a compact car that is sold under the same badge worldwide, which it succeeded in doing so.

Since its release, there has been a total of four generations to hit the market. The fourth and latest of these was unveiled in 2019.

The Focus has become somewhat of an icon in the hatchback class. This has meant it goes up against other big names in the class like the Honda Civic, Opel Astra, and of course, the VW Golf.

One of the most common issues that Focus owners have reported is one that a lot of cars that have been on the market for a while suffer from. P0420 indicates that there is an issue with the catalytic converter’s performance.

For a lot of older vehicles, this can be a result of wear and tear causing the converter to fail. In some cases, this can also be the result of faulty oxygen sensors in the exhaust system.

Another code that owners have reported is P0171, which has affected a number of Ford engines over the years. This code indicates that the engine is running too lean.

One of the first steps in fixing this problem is checking the MAF sensor for any issues. Vacuum leaks are another notorious cause of this code.

Fault code P0456 is another common code that has been reported. This code is logged when a small leak in the EVAP system is detected.

With some luck, this code is a sign that the gas cap is simply not fastened correctly. However, it is possible that there is an actual leak coming from a faulty component somewhere.