Ford Diagnostic Trouble Codes
OBD2 fault codes seen on Ford vehicles, with what each code means and the Ford models it shows up on. Each code's page has its typical repair cost range.
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Intake Camshaft Position - Timing Over-Retarded (Bank 1)
- Ford F-150 5.4L 3V Triton • 2004-2010
Ford service bulletin TSB 06-19-8 covers a ticking, knocking or startup rattle on 3-valve 4.6L and 5.4L…
Throttle Position Sensor/Switch A Circuit Range/Performance Problem
- Ford F-150 • 2004-2010 (4.6L and 5.4L Triton V8)
A throttle fault on these trucks typically brings reduced engine power (limp mode) and a warning light. Check…
Throttle/Pedal Position Sensor/Switch A Circuit Low Input
- Ford F-150 • 2004-2010 (5.4L 3V Triton and 4.6L)
Check the harness where it passes near the intake manifold before ordering either part, because chafing there…
Throttle/Pedal Position Sensor/Switch A Circuit High Input
- Ford F-150 • 2004-2010
On the F-150, check the throttle body connector and harness for chafing before replacing the electronic…
Camshaft Position Sensor A Circuit Malfunction (Bank 2)
- Ford F-150 5.4L 3V Triton • 2004-2010
On the 5.4 L 3-valve V8 (2004-2010 F-150) Ford fits variable camshaft timing (VCT). Ford's service…
Vehicle Speed Sensor "A" Malfunction
- Ford Focus • 2005-2022
Vehicle Speed Sensor "A" Range/Performance
- Ford Focus • 2005-2022
Vehicle Speed Sensor "A" Circuit Low Input
- Ford Focus • 2004-2018
On the Mk2 and Mk3 Focus, P0502 can come from a wheel speed sensor that has stopped producing a signal. Check…
Vehicle Speed Sensor "A" Intermittent/Erratic/High
- Ford Focus • 2005-2022
Check the wheel speed sensor and its signal ring for damage and dirt before replacing parts.
Idle Air Control System Circuit Low
- Ford Focus • 1998-2004
The Mk1 Focus petrol engines have a separate idle air control valve, so P0508 points to that valve, its…
Idle Air Control System Circuit High
- Ford Focus • 1998-2004
Focus Mk1 petrol engines (1998-2004): 1.4 and 1.6 Zetec-S/SE, 1.8 and 2.0 Zetec-R. No engine-specific cause…
Engine Oil Pressure Sensor/Switch Circuit Malfunction
- Ford F-150 • 2004-2010
The 5.4 litre Triton V8 of the F-150 has three valves per cylinder from the 2004 model.
Engine Oil Pressure Sensor/Switch Range/Performance
- Ford F-150 • 2004-2010
The 5.4 litre Triton V8 of the F-150 has three valves per cylinder from the 2004 model.
Serial Communication Link Malfunction
- Ford Focus • 2005-2022
A fault on the CAN bus can set P0600, so the connectors and ground points of the wiring are worth checking…
ECM/PCM Processor Fault
- Ford Focus • 2005-2024
On the Focus, P0606 (and the related P0605 EEPROM error) can follow a low or failing battery, so test the…
ECM/PCM Power Relay De-Energized Performance/Too Early
- Ford Fusion Hybrid (2.5L, first generation) • 2010-2012
A Mitchell 1 shop case describes a 2011 Fusion Hybrid with the 2.5L engine that set P068A. The power relay…
Vehicle ID (VID) Block Corrupted or Not Programmed (Ford)
- Ford Edge (3.5 V6) • 2011-2014
- Ford Fusion (1.5 EcoBoost, 6F35 automatic) • 2014
High Speed CAN Communication Bus
- Ford Fiesta • 2014-2019
Ford's manual for this Fiesta lists two networks at the OBD2 connector: the high-speed CAN on pins 6 and 14…
Lost Communication With ECM/PCM 'A'
- Ford F-150 (11th/12th gen) • 2004-2014
Lost Communication With TCM
- Ford Fiesta and Focus (6DCT250 DPS6 dry-clutch automatic) • 2010-2019
The 6DCT250 (DPS6) is the dry-clutch dual-clutch automatic used in the Fiesta and Focus. Wikipedia lists…
Lost Communication With Anti-Lock Brake System (ABS) Control Module
- Ford F-150 • 2011-2014 (12th gen, 5.0L Coyote and 3.5L EcoBoost)
12th-generation F-150: the code means the ABS control module is not answering on the network, so check its…
Fuel System
Fuel Rail/System Pressure - Too Low
- Ford Focus • 2005-2018
The 1.6 TDCi and 2.0 TDCi diesels can develop P0087 from fuel filter neglect or fuel contamination. The 1.0…
Mass or Volume Air Flow Circuit Low Input
- Ford Focus • 2011-2024
Oiled aftermarket air filters and missed services make contamination more likely.
Mass or Volume Air Flow Circuit High Input
- Ford Focus • 2011-2024
Focus EcoBoost engines (the smaller petrols, the ST's 2.0 and the 2016-2018 RS's 2.3) can report a high MAF…
Fuel Trim Malfunction (Bank 1)
- Ford Focus • 2011-2019
The Focus Mk3 sold in Europe offers the 1.0, 1.5 and 1.6 EcoBoost and the 1.6 Ti-VCT petrol engines. An oiled…
System Too Lean (Bank 1)
- Ford Focus • 2012-2024
On the Focus, P0171 usually comes from air entering after the MAF sensor, such as cracked or perished…
System Too Rich (Bank 1)
- Ford Focus • 2005-2024
A contaminated air mass (MAF) sensor can give a wrong reading, for example after an over-oiled aftermarket…
Injector Circuit / Open - Cylinder 1
- Ford Focus • 2005-2024
The Focus 1.5 and 2.0 TDCi diesels use common-rail injectors, and a replacement injector has to be programmed…
Injector Circuit / Open - Cylinder 2
- Ford Focus • 2011-2018
The Mk3 Focus was sold with EcoBoost petrol engines and with 1.5, 1.6 and 2.0 TDCi diesels. Delphi states…
Injector Circuit / Open - Cylinder 3
- Ford Focus • 2011-2018
The Mk3 Focus was sold with EcoBoost petrol engines and with 1.5, 1.6 and 2.0 TDCi diesels. Delphi states…
Injector Circuit / Open - Cylinder 4
- Ford Focus • 2005-2024
On the TDCi diesel Focus a replacement common-rail injector has to be programmed to the car with a diagnostic…
Injector Circuit / Open - Cylinder 5
- Ford Focus • 2005-2010
In the Focus Mk2 only the ST (from 2005) and the RS (from 2009) have a cylinder 5, because they use a 2.5…
Turbocharger/Supercharger Boost Sensor "A" Circuit Range/Performance
- Ford Fiesta ST 1.6 EcoBoost • 2013-2018
The Fiesta ST's 1.6 EcoBoost has two separate pressure sensors: a MAP sensor on the engine, reached after…
Turbocharger/Supercharger Boost Sensor "A" Circuit Low
- Ford Fiesta ST 1.6 EcoBoost • 2013-2018
Ford's workshop information for the Fiesta ST's 1.6 EcoBoost lists two pressure sensors: a MAP sensor on the…
Turbocharger/Supercharger Boost Sensor "A" Circuit High
- Ford Fiesta ST 1.6 EcoBoost • 2013-2018
On the Fiesta ST's 1.6 EcoBoost the boost sensor behind this code is the combined turbocharger boost pressure…
Turbocharger/Supercharger "A" Underboost Condition
- Ford Focus • 2010-2024
The Focus ST uses the 2.0 EcoBoost and the Focus RS the 2.3 EcoBoost.
Idle Air Control System RPM Lower Than Expected
- Ford Focus • 2011-2019
The Focus Mk3 sold in Europe offers the 1.0, 1.5 and 1.6 EcoBoost and the 1.6 Ti-VCT petrol engines. For a…
Injector Control Pressure Too Low - Engine Cranking
- Ford Super Duty (6.0 Power Stroke V8 diesel) • 2003-2007
The 6.0 Power Stroke uses HEUI injectors that are fired by engine oil, pressurised by a high-pressure oil…
Emissions
Intake Air Temperature Sensor 2 Circuit High
- Ford Focus • 2011-2024
On turbocharged Focus engines the second intake air temperature sensor may be built into the manifold…
Manifold Absolute Pressure/Barometric Pressure Circuit Low
- Ford Focus • 2011-2024
Before replacing the manifold pressure sensor, check its connector for corrosion and its loom for chafing.
Intake Air Temperature Sensor 1 Circuit High
- Ford Focus • 2004-2016
On the 1.6 TDCi engine, the IAT sensor is integrated into the MAF sensor. If the MAF connector comes loose or…
Oxygen Sensor Circuit No Activity Detected (Bank 1, Sensor 1)
- Ford F-150 • 2004-2010
The 5.4 litre 3V Triton V8 was fitted to the F-150 from 2004 to 2010.
O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
- Ford Focus • 2012-2024
The 1.0 EcoBoost has an integrated exhaust manifold and a turbocharger. Match the part number on the sensor…
Exhaust Gas Recirculation Flow Malfunction
- Ford Focus • 2005-2022
The 1.6 TDCi uses the same DV6 diesel as Peugeot's 1.6 HDi. Depending on the version, its EGR valve is either…
Exhaust Gas Recirculation (EGR) Flow Insufficient
- Ford Focus • 2005-2024
Catalyst System Efficiency Below Threshold (Bank 1)
- Ford Focus • 2005-2024
OBD System Readiness Test Not Complete (Ford, Mazda, Jaguar)
- Ford Bronco (1996) • 1996
Ford describes P1000 as monitor testing not complete: the code is stored in continuous memory if any OBD-II…
Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 2)
- Ford S-Max 2.0 TDCi • 2006-2014
One owner report on a 2011 S-Max 2.0 TDCi with P2033 says temperature sensor 2, which sits in the particulate…
Post Catalyst Fuel Trim System Too Lean Bank 1
- Ford F-150 • 2015-2020
Engines covered (petrol): 5.0 litre V8, 3.5 litre EcoBoost V6. No model-specific cause is documented for this…
O2 Sensor Signal Biased/Stuck Lean (Bank 1, Sensor 1)
- Ford Focus • 2005-2024
A contaminated air mass (MAF) sensor can give a wrong reading, for example after an over-oiled aftermarket…
Intake Air System Leak
- Ford F-150 5.4L Triton 3V • 2004-2010
The 5.4 L 3-valve Triton was fitted to the F-150 from 2004 to 2010. Smoke-test the PCV hose and elbow at the…
Particulate Filter Restriction: Soot Accumulation Too High (Bank 1)
- Ford Kuga 2.0 TDCi • 2008-2013
Sema Repair lists P24A4 for the first-generation Kuga 2.0 TDCi 16v, with severe loss of performance in…
Cooling System
Engine Coolant Temperature (ECT) Circuit
- Ford Focus • 2005-2024
Inspect the sensor connector and its wiring for heat damage before assuming the sensor has failed.
Engine Coolant Temperature (ECT) Circuit Range / Performance
- Ford Focus • 2005-2024
An intermittent wiring or connector fault in the sensor circuit can also set P0116, so the sensor plug and…
Engine Coolant Temperature (ECT) Circuit Low
- Ford Focus • 2005-2024
Engine Coolant Temperature (ECT) Circuit High
- Ford Focus • 2005-2024
Coolant Thermostat Below Regulating Temperature
- Ford Focus • 2005-2024
Check the coolant level and look for leaks at the thermostat housing before replacing parts.
Cooling Fan 1 Control Circuit Malfunction
- Ford F-150 • 2004-2014
Check whether your F-150 has an electric fan or a clutch-driven fan before testing the fan control circuit.
Cylinder Head Temperature (CHT) Sensor Circuit Low Input (Ford, Jaguar); Coolant Temperature Sensor Input Too High (Volkswagen)
- Ford Explorer 2.0 GTDI (2012) • 2012
Ford lists P1289 as a CHT sensor circuit high and P1290 as a CHT sensor circuit low on the 2012 Explorer with…
Misfire
Random/Multiple Cylinder Misfire Detected
- Ford Focus • 2012-2024
The 1.0 EcoBoost three-cylinder is sensitive to spark plug and coil wear, and because it has only three…
Cylinder 1 Misfire Detected
- Ford Focus • 2005-2022
On petrol Focus models, a failed cylinder 1 coil-on-plug or a worn spark plug is the everyday cause.
Cylinder 4 Misfire Detected
- Ford Focus • 2012-2024
The 1.0 EcoBoost three-cylinder engine in the Focus does not have a cylinder 4.
Cylinder 5 Misfire Detected
- Ford F-150 5.4L Triton 3V • 2004-2010
The 5.4L 3-valve Triton is hard on coil-on-plug packs, and its two-piece spark plugs are known for breaking…
Ignition
Crankshaft Position Sensor "A" Circuit Malfunction
- Ford Focus • 2005-2022
Camshaft Position Sensor Circuit Malfunction
- Ford Focus • 2012-2019
The 1.0 EcoBoost uses a timing belt that runs in oil (a wet belt) that can degrade early, so an erratic cam…
Ignition Coil A Primary/Secondary Circuit Malfunction
- Ford F-150 • 2004-2014
5.4L 3V Triton is prone to cracked coil boots and coils arcing to the head. Ford changed the coil version…
Ignition Coil B Primary/Secondary Circuit Malfunction
- Ford F-150 • 2004-2014
The 5.4L 3V Triton's coil-on-plug units commonly fail at high mileage, and Ford changed the coil version…
Ignition Coil C Primary/Secondary Circuit Malfunction
- Ford F-150 • 2004-2010 (5.4L 3-valve Triton V8)
Ford service bulletin 08-7-6 covers 5.4L 3-valve F-150s from 2004 to 2008 built before 9 October 2007: the…
Ignition Coil D Primary/Secondary Circuit Malfunction
- Ford F-150 • 2004-2008
The 5.4L 3V Triton of the 2004-2008 F-150 (built before October 2007) uses a two-piece spark plug that can…
Crankshaft Position System Variation Not Learned (GM); Crank/Cam Sensor Range/Performance (Ford)
- Ford Ranger 3.0 V6 • 1995-1997
Ford's code list describes P1336 as a crank or cam sensor range or performance fault. On the 1995 to 1997 3.0…
Ignition Diagnostic Monitor Input Circuit Malfunction (Ford); Camshaft or VVT Sensor Range/Performance (Toyota, Lexus, Audi, VW)
- Ford Bronco 5.8 V8 (1996) • 1996
Ford's definition is IDM input circuit malfunction (ignition diagnostic monitor circuit input fault). On a…
EVAP System
Evaporative Emission Control System Malfunction
- Ford Focus • 2005-2024
The Mk2 Focus uses a screw-type fuel cap with a rubber seal that hardens over time, and a worn cap seal is a…
Evaporative Emission System: Incorrect Purge Flow
- Ford Focus • 2005-2024
On a Focus, a purge valve that sticks open can cause a rough or hunting idle alongside the code. Check the…
Evaporative Emission System Leak Detected (Small Leak)
- Ford Focus • 2005-2022
Some Focus versions have a screw-type fuel cap and others the capless Easy Fuel filler, so check which one…
Evaporative Emission Control System Vent Control Circuit Open
- Ford Focus • 2005-2024
P0447 concerns the vent valve circuit, not the engine-bay purge valve, so test the vent valve, its connector…
Evaporative Emission Control System Vent Control Circuit Shorted
- Ford Focus • 2005-2018
This entry covers the Focus Mk2 (from 2004) and Mk3 (2011-2018).
Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction
- Ford Focus • 2005-2018
This entry covers the Focus Mk2 (from 2004) and Mk3 (2011-2018).
Evaporative Emission Control System Pressure Sensor Intermittent
- Ford Focus • 2005-2024
No Focus-specific cause is documented for this code. The general causes and diagnosis steps apply.
Evaporative Emission System Leak Detected (Large Leak)
- Ford Fiesta • 2008-2023
Evaporative Emission Control System Leak Detected (Fuel Cap Loose/Off)
- Ford Focus • 2011-2018
The Mk3 Focus has Ford's capless fuel filler, so there is no cap to leave loose; look at the filler neck and…
Evaporative Emission System: High Purge Flow
- Ford Focus • 2005-2024
Check the valve connector for corrosion before condemning the valve.
Transmission
Transmission Control System Malfunction
- Ford Focus • 2012-2016
A US class action covered 2012 to 2016 Ford Focus cars with the PowerShift (DPS6) dual-clutch gearbox over…
Transmission Range Sensor Circuit Malfunction (PRNDL Input)
- Ford F-150 • 2004-2008
From 2004 to 2008 the F-150 with the 5.4L 3-valve V8 used the 4R75E four-speed automatic. P0705 on one of…
Output Speed Sensor Circuit Malfunction
- Ford Focus • 2005-2022
On a Focus with the PowerShift dual-clutch transmission or a conventional automatic, P0720 refers to the…
Clutch B Actuator Control Circuit Low
- Ford Focus (6DCT250 DPS6 dry-clutch automatic) • 2012-2018
- Ford Fiesta (6DCT250 DPS6 dry-clutch automatic) • 2011-2017
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