Ford F-150: Common Codes & Fixes
Real-world diagnostic data for the Ford F-150. These are the codes techs see most often. Tap any code for the full vehicle-specific fix and the exact part.
159 codes have specific fixes for the Ford F-150
B0028 B0028 (left front deployment loop) on Ford trucks is typically caused by a corroded or damaged driver-side airbag wiring harness where… B0029 B0029 (right front deployment loop) on Ford trucks usually comes down to the passenger airbag connector under the seat working loose due… B0100 Check the clockspring in the steering column first -- it connects the airbag module and fails with age. B1000 B1000 is a generic ECU malfunction code on Ford vehicles. B1318 B1318 (battery voltage low to the GEM/BCM) on F-150s typically indicates a weak battery or corroded ground strap. B1325 Ground circuit open is almost always a corroded ground strap or bolt. B1342 B1342 indicates a PCM internal fault on Ford trucks. B1352 B1352 (ignition key illumination circuit) on older F-150s is typically a burnt-out key cylinder halo light or a broken wire in the… B1601 PATS (Passive Anti-Theft System) key not programmed. B1676 B1676 (battery voltage out of range) on F-150s is the BCM reporting system voltage is below ~11V or above ~16V. C0300 On Ford trucks, C0300 often refers to the rear differential speed sensor. C1233 Left front wheel speed sensor circuit on Ford trucks. C1234 Right front wheel speed sensor -- same diagnosis and repair procedure as C1233 (left side). P0012 Intake cam phaser is stuck retarded. P0016 Cam-crank correlation code on EcoBoost usually means a cam phaser has lost position. P0018 On EcoBoost V6s P0018 is usually the Bank 2 cam phaser sticking due to aged oil. P0021 On the Cyclone V6, P0021 is usually a sticking variable cam timing (VCT) solenoid or a worn cam phaser, aggravated by extended… P0025 Bank 2 (passenger) VCT solenoid is under the valve cover on EcoBoost -- replace with Motorcraft only, aftermarket fails. P0030 Ford bank 1 sensor 1 O2 heater failures are often caused by a corroded connector at the sensor pigtail, especially on trucks exposed to… P0037 Downstream O2 sensor heater fails due to broken exhaust manifold studs allowing exhaust leak at the sensor location. P0050 On Ford V6 and V8 engines, the bank 2 sensor 1 O2 sensor is on the driver-side exhaust manifold. P0056 The bank 2 downstream O2 sensor on Ford trucks is in the exhaust pipe after the driver-side catalytic converter. P0087 Low fuel rail pressure on EcoBoost engines is most commonly caused by a failing high-pressure fuel pump (HPFP) mounted on top of the… P0088 Ford EcoBoost high fuel pressure can be caused by a stuck high-pressure fuel pump relief valve or a faulty fuel pressure sensor. P0089 Fuel pressure regulator performance issues on Ford trucks are usually caused by a leaking or stuck regulator diaphragm. P0100 MAF sensor circuit malfunction typically caused by an oiled-over hot wire (from over-oiled aftermarket air filter) or a cracked intake… P0101 EcoBoost engines blow off excess boost pressure through the intake tract which contaminates the MAF sensor. P0102 Low MAF signal on EcoBoost often indicates a boost leak at the charge pipe causing the MAF to read lower than expected airflow. P0103 MAF reading too high on the 5.0L Coyote usually indicates a failed MAF sensor element or water intrusion into the MAF connector. P0107 TMAP sensor (combined MAP/IAT) on top of intake manifold reads below expected voltage. P0108 MAP high voltage often from a disconnected signal wire at the TMAP connector. P0110 Intake air temperature sensor circuit malfunction. P0111 IAT sensor reading stuck/unresponsive during warm-up — typically the integrated IAT portion of the MAF sensor has failed. P0113 The intake air temperature (IAT) sensor is integrated into the MAF sensor on Ford trucks. P0117 ECT voltage low — replace the Motorcraft ECT sensor. P0118 Cylinder head temperature sensor (CHT, Ford uses this instead of ECT) reads open-circuit. P0120 Throttle position sensor circuit malfunction. P0121 TPS signal does not match expected range for current conditions. P0122 The throttle position sensor is integrated into the electronic throttle body on modern Ford trucks. P0124 TPS intermittent signal — clean or replace the electronic throttle body. P0131 Before replacing the O2 sensor, check for exhaust leaks near the exhaust manifold -- a leak upstream of the sensor causes false lean… P0132 Bank 1 upstream O2 sensor circuit high voltage (above 1.0V constantly). P0133 EcoBoost engines contaminate O2 sensors faster than NA engines due to higher exhaust temps. P0135 Check the O2 sensor heater fuse first (15A in the battery junction box). P0136 Bank 1 downstream O2 sensor malfunction. P0137 Test the downstream O2 sensor voltage with a scan tool -- it should fluctuate slowly between 0.1V and 0.9V. P0138 Bank 1 downstream O2 sensor reading high voltage (stuck rich above 0.9V). P0139 Downstream O2 slow response — catalytic converter efficiency dropping. P0141 Bank 1 downstream O2 sensor heater circuit fault. P0143 Bank 1 sensor 3 (post-post-cat on Ford V8) low voltage — often caused by exhaust manifold crack causing ambient air dilution at the sensor. P0150 Bank 2 sensor 1 (upstream, passenger side on most V8s) malfunction — replace with Motorcraft or Denso OEM. P0155 Bank 2 (passenger side) upstream O2 sensor heater circuit has failed. P0158 Replace Bank 2 Sensor 2 with Motorcraft. P0160 Bank 2 downstream O2 shows no activity — replace downstream O2 sensor. P0161 Bank 2 downstream O2 sensor heater circuit fault. P0163 Replace Bank 2 Sensor 3 (tailpipe-end) O2 sensor with Motorcraft. P0171 Cracked intake manifold extremely common on 5.4L 3-valve. P0172 Rich condition on Bank 1 is often caused by leaking fuel injectors. P0174 P0174 (Bank 2 lean) combined with P0171 (Bank 1 lean) almost always means a vacuum leak on the 5.4L. P0175 Bank 2 (passenger side) running rich. P0175 Bank 2 rich on the 5.4L V8. P0178 Flex fuel sensor circuit low — replace with Motorcraft sensor. P0191 Fuel rail pressure sensor range/performance on EcoBoost engines means the sensor signal is erratic or outside expected parameters. P0192 Low input from the fuel rail pressure sensor means the signal voltage is below the expected minimum. P0193 High input from the fuel rail pressure sensor means the signal voltage exceeds the expected maximum. P0201 Cylinder 1 fuel injector circuit malfunction. P0202 Cylinder 2 injector circuit malfunction. P0203 Cylinder 3 injector circuit malfunction. P0204 Cylinder 4 injector circuit malfunction. P0217 Engine overheating condition detected. P0219 Engine overspeed condition. P0222 Ford EcoBoost P0222 almost always = corroded throttle body connector pins. P0223 TPS-B high almost always = internal throttle body failure on EcoBoost engines. P0230 The fuel pump primary circuit supplies power to the in-tank fuel pump through the fuel pump relay and fuel pump driver module (FPDM). P0231 Fuel pump secondary circuit low means the fuel pump feedback signal to the PCM is below the expected range. P0234 Turbo overboost condition. P0261 Cylinder 1 injector circuit low means the PCM detects low current draw from the #1 fuel injector. P0262 Cylinder 1 injector circuit high means excessive current draw or a short to power. P0269 Cylinder 5 contribution fault — 5.4L 3V is plagued by cam phaser rattle and variable cam timing issues causing cylinder-specific misfires. P0299 Turbo underboost on EcoBoost engines is most commonly caused by a leaking charge air cooler (intercooler). P0300 Check for carbon buildup on intake valves (direct injection issue). P0301 Cylinder 1 misfire on EcoBoost is usually a failed ignition coil (Motorcraft DG-549). P0302 Cylinder 2 misfire on the Coyote V8 is usually an ignition coil (Motorcraft DG-542). P0303 Cylinder 3 misfire on EcoBoost. P0305 Cylinder 5 misfire on the Coyote V8. P0306 Cylinder 6 misfire on EcoBoost. P0308 Cylinder 8 misfire on Ford V8s usually traces to the coil-on-plug or the spark plug for that cylinder. P0313 P0313 is a SAFEGUARD code -- the engine triggers it when the tank is too low and the fuel pump cavitates, causing a misfire. P0316 P0316 on 6.0L and 5.4L 3V Fords is the classic cold-start misfire -- failed cam phasers ticking for the first few seconds. P0316 On Ford 3.5L EcoBoost, cold-start P0316 is typically carbon-fouled intake valves. P0345 Bank 2 cam position sensor failure. P0351 Ignition coil 1 primary/secondary circuit malfunction. P0352 Ignition coil 2 primary/secondary circuit fault. P0353 Ignition coil C failure is common on EcoBoost engines due to heat soak on the rear bank. P0354 Coil #4 on the 5.0L Coyote is prone to failure from engine vibration cracking the internal windings. P0391 Bank 2 cam sensor B circuit malfunction — replace the cam position sensor on the passenger side head. P0401 EGR passages clogged with carbon is the #1 cause. P0403 The EGR valve solenoid circuit fails due to corroded connector pins on the 5.4L Triton. P0405 P0405 means the EGR valve position sensor is reading lower than expected. P0406 P0406 means the EGR position sensor is reading higher than expected. P0430 Bank 2 (passenger side) catalytic converter efficiency below threshold. P0431 On Ford trucks, P0431 indicates the Bank 2 (passenger side) warm-up cat is degraded. P0432 P0432 indicates the main (underbody) catalytic converter on Bank 2 is below efficiency threshold. P0442 The fuel tank deformation on Ford trucks causes intermittent small leaks. P0444 P0444 indicates the EVAP purge control valve circuit is open. P0446 The EVAP canister purge valve (Motorcraft CX-2536) sticks open, which can also set P0446. P0450 The fuel tank pressure sensor (FTP) on Ford trucks fails from exposure to fuel vapors and moisture. P0451 P0451 indicates the fuel tank pressure (FTP) sensor is reading outside of its expected range. P0452 The FTP sensor reads low voltage (below 0.5V) due to a wiring short to ground. P0453 High FTP sensor voltage (above 4.5V) is usually caused by an open circuit in the signal wire or a failed sensor. P0454 Intermittent FTP sensor readings on Ford trucks are commonly caused by cracked solder joints inside the sensor or a corroded connector. P0460 The fuel level sender unit in Ford trucks uses a variable resistor that wears out, causing erratic gauge readings and P0460. P0462 Low fuel level sensor input means the sender is reading near-zero resistance. P0463 High fuel level sensor reading (gauge always reads full) is caused by an open circuit in the fuel sender. P0499 F-150 P0499 points to the EVAP vent solenoid (Ford calls it the Canister Vent Solenoid, CVS) on the canister behind the rear wheel. P0506 A vacuum leak at the PCV valve elbow or the brake booster hose causes idle to drop below the target RPM. P0520 The oil pressure sensor on the 5.4L Triton is located in the oil filter housing and is prone to leaking. P0530 The A/C pressure transducer on the accumulator/drier is a common failure point. P0562 Low system voltage on Ford trucks is commonly caused by a failing voltage regulator inside the alternator or corroded battery terminal… P0602 P0602 on Ford = PCM 'Control Module Programming Error.' Usually appears after a PCM swap without programming, or after a failed Ford… P0603 The PCM KAM reset error on Ford trucks is often caused by a corroded battery cable terminal allowing momentary power drops. P0606 Before replacing the PCM, check all power and ground circuits. P0614 On Ford, a failed TCM often throws P0614. P0722 The 6R80 output shaft speed sensor is located on the rear of the transmission. P0731 The 6R80 uses a direct clutch for 1st gear. P0733 Third gear ratio fault on the 6R80 often stems from intermediate clutch wear or a problem with the #3 trim solenoid in the mechatronic unit. P0744 TCC intermittent codes on the 6R80 are commonly caused by a worn TCC control solenoid or debris in the valve body TCC regulator valve bore. P0748 PCS electrical faults on the 6R80 are often caused by the internal wiring harness rather than the solenoid itself. P0785 The 6R80 shift timing solenoid controls shift overlap during gear changes. P0843 On the 6R80, P0843 is a HIGH-voltage fault on the transmission fluid pressure sensor circuit. P0894 Transmission slipping on the 6R80 can be caused by worn clutch packs, a failing torque converter, or low line pressure. P1131 P1131 on Ford = 'Lack of Upstream O2 Sensor Switch, Bank 1 Lean' -- the upstream O2 is reading lean constantly. P1150 P1150 O2 sensor heater Bank 1 on older Ford V8s is usually a blown O2 heater fuse or a failed upstream O2 sensor. P1200 P1200 fuel injector circuit on Ford V8s is typically a single failed injector or its driver circuit in the PCM. P1289 Ford P1289 = Cylinder Head Temperature (CHT) sensor high voltage. P2098 Ford P2098 = 'Post Catalyst Fuel Trim System Too Lean, Bank 2.' The downstream O2 sensor is reading leaner than expected. P2099 Ford P2099 = Post Catalyst Fuel Trim bank 2 TOO RICH. P2118 P2118 = throttle actuator motor circuit current range/performance. P2270 P2270 (downstream O2 stuck lean) commonly = failed rear O2 sensor. P2279 Ford EcoBoost P2279 is a MASSIVE search topic -- intake air system leak. P2506 P2506 = battery voltage saw an unexpected disconnect or dip. P2635 Ford EcoBoost P2635 = low-pressure (lift) fuel pump flow out of range. P2635 Fuel pump driver module (FPDM) failure -- mounted on the frame rail and corrodes. P2886 EcoBoost P2886 often points to low oil level or degraded oil starving the turbos. U0001 CAN bus issues on Ford vehicles are frequently caused by a corroded connector at the Gateway Module (behind the fuse panel). U0073 Ford U0073 typically indicates a shorted CAN bus wire, often at the firewall grommet or a pinched wire at a module connector. U0100 On Ford vehicles, U0100 often appears alongside a no-start condition. U0101 Ford TCM communication loss is commonly caused by a failed TCM power supply or corroded connector. U0121 Ford ABS module communication loss is often caused by a failing ABS module power supply. U0131 Ford EPAS (Electric Power Assist Steering) communication faults are commonly caused by the EPAS module overheating. U0140 Ford BCM communication loss often accompanies multiple other U-codes because the BCM is a gateway for many subsystems. U0155 Ford instrument cluster communication issues are commonly caused by a software glitch. U0184 U0184 (lost communication with radio) on Fords is commonly caused by a blown radio fuse (usually a 10A in the underhood or cabin fuse box). U0401 U0401 on Ford vehicles can be caused by a PCM that needs a Throttle Body relearn or KAM (Keep Alive Memory) reset after a battery… U0402 F-150 U0402 often appears when the transmission is going into limp mode. U0422 U0422 (invalid data from BCM) on Ford trucks typically means the BCM is reporting impossible values -- often a battery voltage reading… U0645 U0645 lost comm with instrument cluster on F-150 is almost always a failing cluster -- the gauge stepper motors fail and the cluster… U0672 Ford U0672 is usually a corroded ground G301 under the driver's dash or water intrusion at the BCM in the left kick panel. U1149 U1149 lost comm with BCM on older Ford trucks is almost always water damage at the GEM (Generic Electronic Module) in the left kick panel. U1609 U1609 on Ford is a lost communication code typically from the BCM or GEM. U1882 U1882 on Ford is typically a lost communication code with a body electronics module. U3125 Ford U3125 is often the ABS module or 4WD control module that won't respond on CAN.
Frequently Asked Questions
What are the most common check engine light codes on a Ford F-150?
The most commonly reported OBD-II codes for the Ford F-150 include B0028, B0029, B0100, B1000, B1318. Each code indicates a specific issue -- tap any code above for the full diagnostic breakdown.
How much does it cost to fix a check engine light on a Ford F-150?
Repair costs vary by code. Many Ford F-150 fixes like gas cap replacement, sensor cleaning, or spark plug changes are under $50 in parts and can be done at home. More complex repairs like catalytic converter or transmission work can run $500-$2,000+ at a shop.
Can I drive my Ford F-150 with the check engine light on?
It depends on the code. A steady check engine light usually means you can drive short distances safely. A flashing check engine light means stop driving immediately -- continued driving can cause serious engine damage. Scan the code first to know what you are dealing with.