Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2018F-150 XLT, 4D PICKUP EXTRA CAB, 3.5L ENG VIN G, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXDTC INDEX - (ANTI LOCK BRAKE SYSTEM - ELECTRONIC ENGINE CONTROLS)ELECTRONIC ENGINE CONTROLS DTCS3.0L POWER STROKE DIESEL
2018 Ford F-150 XLT, 4D Pickup Extra Cab, 3.5L Eng VIN G, RWD
3.0L Power Stroke Diesel
2018 Ford F-150 XLT, 4D Pickup Extra Cab, 3.5L Eng VIN G, RWDSECTION 3.0L Power Stroke Diesel
DTC INDEX
| DTC | Description | Action |
|---|---|---|
| P0128 | Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature) | REFER to: Engine Cooling . |
| P025B | Fuel Pump Module A Control Circuit Range/Performance | First, Refer to Engine Controls - Introduction (Diesel) . If sent here from the Engine Controls article, Refer to: BCM Hardware Testing - F150 . |
| P025C | Fuel Pump Module A Control Circuit Low | First, Refer to Engine Controls - Introduction (Diesel) . If sent here from the Engine Controls article, BCM Hardware Testing - F150 |
| P025D | Fuel Pump Module A Control Circuit High | First, Refer to Engine Controls - Introduction (Diesel) . If sent here from the Engine Controls article, Refer to: BCM Hardware Testing - F150 |
| P027B | Fuel Pump Module B Control Circuit Range/Performance | First, Refer to Engine Controls - Introduction (Diesel) . If sent here from the Engine Controls article, Refer to: BCM Hardware Testing - F150 |
| P0504 | Brake Switch A / B Correlation | Without adaptive cruise control, REFER to: Cruise Control Without adaptive cruise control , REFER to: Cruise Control With: Adaptive Cruise Control . |
| P0532 | A/C Refrigerant Pressure Sensor "A" Circuit Low | With DATC REFER to: Climate Control System - Vehicles With: Dual Automatic Temperature Control (DATC) . With EMTC, REFER to: Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) . |
| P0533 | A/C Refrigerant Pressure Sensor "A" Circuit High | With DATC REFER to: Climate Control System - Vehicles With: Dual Automatic Temperature Control (DATC) . With EMTC, REFER to: Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) . |
| P0563 | System Voltage High | REFER to: Charging System - 3.0L Power Stroke Diesel . |
| P0565 | Cruise Control ON Signal | REFER to: Cruise Control . |
| P0567 | Cruise Control RESUME Signal | REFER to: Cruise Control . |
| P0568 | Cruise Control SET Signal | REFER to: Cruise Control . |
| P0569 | Cruise Control COAST Signal | REFER to: Cruise Control . |
| P0572 | Brake Switch A Circuit Low | Without adaptive cruise control, REFER to: Cruise Control Without adaptive cruise control . REFER to: Cruise Control With: Adaptive Cruise Control . |
| P0573 | Brake Switch A Circuit High | Without adaptive cruise control, REFER to: Cruise Control Without adaptive cruise control . REFER to: Cruise Control With: Adaptive Cruise Control . |
| P059F | Active Grille Air Shutter "A" Performance / Stuck Off | REFER to: Active Grille Shutter . |
| P05A2 | Active Grille Air Shutter "A" Control Circuit / Open | REFER to: Active Grille Shutter . |
| P0620 | Generator Control Circuit | REFER to: Charging System - 3.0L Power Stroke Diesel . |
| P0625 | Generator Field Terminal Circuit Low | REFER to: Charging System - 3.0L Power Stroke Diesel . |
| P0626 | Generator Field Terminal Circuit High | REFER to: Charging System - 3.0L Power Stroke Diesel . |
| P0645 | A/C Clutch Relay Control Circuit | With DATC REFER to: Climate Control System - Vehicles With: Dual Automatic Temperature Control (DATC) . With EMTC, REFER to: Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) . |
| P0646 | A/C Clutch Relay Control Circuit Low | With DATC REFER to: Climate Control System - Vehicles With: Dual Automatic Temperature Control (DATC) . With EMTC, REFER to: Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) . |
| P0647 | A/C Clutch Relay Control Circuit High | With DATC REFER to: Climate Control System - Vehicles With: Dual Automatic Temperature Control (DATC) . With EMTC, REFER to: Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) . |
| P0850 | Park / Neutral Switch Input Circuit | REFER to: Starting System . |
| P1001 | KOER Not Able to Complete, KOER Aborted | RETRIEVE and RECORD all Diagnostic Trouble Codes (DTCs). REPAIR any self-test or Continuous Memory Diagnostic Trouble Codes (CMDTCs) first. CLEAR the DTC. RERUN the KOER self-test. If the DTC returns, REPROGRAM the PCM with the latest software. REFER to: Module Programming . RERUN the KOER self-test. If the DTC returns, Refer to: PCM Hardware Testing . |
| P1397 | System Voltage Out Of Self Test Range | REFER to: Charging System - 3.0L Power Stroke Diesel . |
| P145B | A/C Demand Not Activated During Self Test | With DATC REFER to: Climate Control System - Vehicles With: Dual Automatic Temperature Control (DATC) . With EMTC, REFER to: Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) . |
| P1464 | A/C Demand Out Of Self Test Range | With DATC REFER to: Climate Control System - Vehicles With: Dual Automatic Temperature Control (DATC) . With EMTC, REFER to: Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) . |
| P1501 | Vehicle Speed Sensor Out Of Self Test Range | REFER to: Anti-Lock Brake System (ABS) and Stability Control . |
| P1548 | Engine Air Filter Restriction | This DTC sets when the PCM detects low air pressure after the air filter. CHECK the Air Cleaner (ACL) element, Air Cleaner (ACL) inlet and outlet pipes for restrictions, water or contamination. REPAIR as necessary. RETRIEVE and REPAIR all other Diagnostic Trouble Codes (DTCs). REFER to: Diagnostic Trouble Code Charts . |
| P161A | Incorrect Response from Immobilizer Control Module | Without keyless vehicle system, REFER to: Passive Anti-Theft System (PATS) Without keyless vehicle system, , REFER to: Passive Anti-Theft System (PATS) With keyless vehicle system . |
| P1678 | Low Oil Pressure Lamp Control Circuit | REFER to: Instrumentation, Message Center and Warning Chimes . |
| P1703 | Brake Switch Out Of Self-Test Range | Without adaptive cruise control, REFER to: Cruise Control Without adaptive cruise control, . REFER to: Cruise Control With: Adaptive Cruise Control . |
| P1709 | Park Neutral Position Switch Out Of Self Test Range | REFER to: Diagnostic Trouble Code (DTC) Charts and Pinpoint Tests - 3.0L Power Stroke Diesel . |
| U0121 | Lost Communication With Anti-Lock Brake System (ABS) Control Module | GO to Pinpoint Test A |
| U0212 | Lost Communication With Steering Column Control Module | GO to Pinpoint Test B |
| U0402 | Invalid Data Received from TCM | GO to Pinpoint Test C |
| All Other DTCs | - | Refer to Engine Controls - Symptom Charts (Diesel) . |
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.