Ford Expedition: Common Codes & Fixes
Real-world diagnostic data for the Ford Expedition. These are the codes techs see most often. Tap any code for the full vehicle-specific fix and the exact part.
37 codes have specific fixes for the Ford Expedition
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… B1318 Expedition B1318 often arrives together with a flaky remote-start or liftgate that will not open. B1352 Expedition B1352 is usually a failed ignition key halo bulb. P0050 On Ford V6 and V8 engines, the bank 2 sensor 1 O2 sensor is on the driver-side exhaust manifold. P0103 MAF reading too high on the 5.0L Coyote usually indicates a failed MAF sensor element or water intrusion into the MAF connector. P0118 Cylinder head temperature sensor (CHT, Ford uses this instead of ECT) reads open-circuit. 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. P0161 Bank 2 downstream O2 sensor heater circuit fault. P0163 Replace the rearmost B2 O2 sensor. P0171 Cracked intake manifold extremely common on 5.4L 3-valve. P0175 Bank 2 (passenger side) running rich. P0175 Bank 2 rich on the 5.4L V8. P0203 Cylinder 3 injector circuit malfunction. P0269 Cylinder 5 contribution fault — 5.4L 3V is plagued by cam phaser rattle and variable cam timing issues causing cylinder-specific misfires. P0305 Cylinder 5 misfire on the Coyote V8. P0306 Cylinder 6 misfire on EcoBoost. 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. P0406 P0406 means the EGR position sensor is reading higher than expected. P0430 Bank 2 (passenger side) catalytic converter efficiency below threshold. P0432 P0432 indicates the main (underbody) catalytic converter on Bank 2 is below efficiency threshold. P0454 Intermittent FTP sensor readings on Ford trucks are commonly caused by cracked solder joints inside the sensor or a corroded connector. P0522 Low oil pressure sensor input can be caused by an oil-soaked connector or a worn sensor. P0605 Ford P0605 indicates PCM ROM corruption. P0843 On the 6R80, P0843 is a HIGH-voltage fault on the transmission fluid pressure sensor circuit. P1150 P1150 O2 sensor heater Bank 1 on older Ford V8s is usually a blown O2 heater fuse or a failed upstream O2 sensor. 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. P2270 P2270 (downstream O2 stuck lean) commonly = failed rear O2 sensor. U0073 Ford U0073 typically indicates a shorted CAN bus wire, often at the firewall grommet or a pinched wire at a module connector. 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). U0422 U0422 (invalid data from BCM) on Ford trucks typically means the BCM is reporting impossible values -- often a battery voltage reading… 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. U1882 U1882 on Ford is typically a lost communication code with a body electronics module.
Frequently Asked Questions
What are the most common check engine light codes on a Ford Expedition?
The most commonly reported OBD-II codes for the Ford Expedition include B0028, B0029, B1318, B1352, P0050. 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 Expedition?
Repair costs vary by code. Many Ford Expedition 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 Expedition 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.