Ford OBD Codes: Meaning & Fixes

P0174 Powertrain The cylinder bank without cylinder 1 is running lean even with the maximum fuel correction… Moderate P0300 Powertrain The engine computer sees misfires that jump between cylinders or hit several cylinders at once. High P0304 Powertrain Cylinder 4 is misfiring. Its end or rear position makes water, oil and intake leaks common… Moderate P0430 Powertrain The bank 2 converter on a V6, V8 or split-exhaust engine isn't cleaning the exhaust well enough. Low P0301 Powertrain Cylinder 1 is repeatedly failing to fire. The cause is almost always its coil, plug, injector… Moderate P0302 Powertrain Cylinder 2 keeps misfiring. On inline engines it's a middle cylinder, so rule out coolant… Moderate

P0734 Powertrain Fourth gear (overdrive on four-speed units) doesn't hold the expected input-to-output speed… Moderate P0743 Powertrain The TCC solenoid circuit shows an electrical fault such as a short, overcurrent or out-of-range… Low P0750 Powertrain The transmission computer sees a fault in shift solenoid A or its circuit and can't use it… Moderate P0770 Powertrain Solenoid E in a five- or six-speed automatic isn't working as commanded: electrical fault… Moderate P07A3 Ford · Powertrain The PowerShift's odd-gear clutch isn't letting go when the TCM commands it open, so the car… High P090C Ford · Powertrain The PowerShift TCM sees a low signal on the motor that works clutch B, the even-gear… Moderate P0A7F Powertrain The battery computer has calculated that the whole high-voltage pack has worn past its usable… Moderate P1000 Ford · Powertrain Ford's computer hasn't finished all its self-tests yet. It's a status message, not a fault. Minor P1131 Ford · Powertrain Ford's front O2 sensor on bank 1 stays lean even after the PCM has added all the fuel it… Low P1132 Ford · Powertrain Ford's front O2 sensor on bank 1 keeps reading rich even though the PCM has pulled out as much… Low P1151 Ford · Powertrain On a Ford V6 or V8, the front O2 sensor on the bank 2 side stays lean and never switches back… Low P1152 Ford · Powertrain On a Ford V6 or V8, the bank 2 front O2 sensor sticks on rich even after the PCM leaned that… Low P1233 Ford · Powertrain The Ford PCM lost the status signal from the fuel pump driver module, so fuel pump control… Moderate P1260 Ford · Powertrain Ford's Passive Anti-Theft System didn't accept the key, so the PCM shut off fuel and the engine… Moderate P1285 Ford · Powertrain Ford's cylinder head temperature sensor reports the engine is overheating. Pull over and shut… Critical P1289 Ford · Powertrain The CHT sensor signal on your Ford is stuck near 5 volts, which the PCM reads as an impossibly… Moderate P1299 Ford · Powertrain The engine got so hot that the Ford PCM is shutting off fuel to cylinders to save it. Stop… Critical P1336 Ford · Powertrain The Ford PCM sees the cam and crank signals out of step, usually from a mistimed or worn cam… Moderate P1400 Ford · Powertrain The Ford PCM sees the EGR pressure-feedback (DPFE) sensor signal stuck below its normal minimum… Low P1401 Ford · Powertrain The Ford DPFE sensor that measures EGR flow is sending a voltage above anything it should… Low P1405 Ford · Powertrain Ford's EGR flow sensor isn't getting exhaust pressure on its upstream port: loose, split… Low P1406 Ford · Powertrain The hose between Ford's DPFE sensor and the EGR-valve side of the orifice is off, leaking… Low P144A Ford · Powertrain Ford's EVAP test pulled vacuum too fast, meaning part of the vapor path to the fuel tank… Low P1450 Ford · Powertrain Ford's EVAP test pulled vacuum on the fuel tank and the vacuum didn't bleed off as expected. Low P1451 Ford · Powertrain Ford's PCM sees an electrical fault in the circuit of the EVAP canister vent solenoid near… Minor P1506 Ford · Powertrain Ford's idle speed stays above target even though the PCM has closed the idle air valve as far… Low P1507 Ford · Powertrain Ford's idle keeps dropping below target even with the idle air valve commanded wide open, often… Low P1518 Ford · Powertrain Ford's intake runner plates didn't close when commanded, so low-rpm torque suffers. Often… Low P1633 Ford · Powertrain Ford's PCM lost its constant battery feed, so the memory holding learned fuel, idle and shift… Low P1702 Ford · Powertrain Ford's gear selector position signal drops out now and then, so the PCM briefly loses track… Moderate