P1000 ford after working on the cylinder 3 valve of my ford f 150 v8 4.6L the truck doesn't take of as it were at first and a code p1000 has been detected after scan.what is the problem?

Romel Edmondson

• 68 Answers
• Posted on Feb 14, 2009

SOURCE: 2000 CIVIC System too lean Cylinder 3 and 4 misfire Deteced

1. P0171: This means that the oxygen sensor has detected a lean air-fuel ratio. This can be caused due to a vaccuum leak or a problem in the HO2S circuit or the HO2S (Heated Oxygen Sensor) itself. (Bank one Sensor one). This is commonly located along the exhaust pipe. It could also be a bad Mass Air Flow sensor or a bad Engine Coolant Temperature sensor. Diagnostic checks will be needed to be carried out to be verified though
2. Well as for the other codes, it means #3&4 cylinders are misfiring. It is a possibility that the P0171 code mite have caused the others to show up. I can be wrong though. But it is a strong possibility. If the air fuel mixtue is too lean indeed, mis-firing will occur, unless it is an actual electronic and not a mechnical problem. By the way, when these codes appear, how is the engine's performance. Does it remain the same or behaves poorly?

SOURCE: 2000 ford winstar sel update to problem

i had asimiliar misfire on my 2000 windstar.the first thing to check is a broken valve spring by taking off the valve cover the other is a o2 sensor bank 2 i believe is the downstream.if not the valve spring then either the coil pack or thecontrol module. either way it is fairly inexspensive

SOURCE: 1997 FORD CODE P1000

a p1000 code means that the system has not run all checks since last memory erase. in other words after a code erase this code is set until the car has been driven for 2 drive cycles which is 20 to 25 miles then 20 to 25 miles again.

SOURCE: CAN YOU TELL ME WHAT THE P1000 CODE MEANS FOR A

P1000 means a drive cycle has not completed, it will only clear itself after driving the vehicle through certain driving conditions. If you try to clear the code, it will reappear until you repeat the drive cycle. I am not too familiar with what AE will show, but if you can access Mode 6 data or the OBD Drive Cycle(These are two options from the IDS at Ford), It may help to show what tests have either failed or not completed. Heres what must be done to clear the P1000:


Note: The IAT PID must be between 10-38°C (50-100° F) during the OBD II drive cycle to enter into all the OBD II monitors. The FLI PID must be between 15% and 85% at all times.

Drive in stop-and-go traffic with at lease 4 idle periods (30 seconds each) while observing the status of the OBD II monitor on the scan tool. If the exhaust gas recirculation (EGR), heated oxygen sensor (HO2S), evaporative emission (EVAP), secondary air (AIR) (if applicable) or catalyst efficiency monitor have not completed, drive on the highway at a constant speed over 64 km/hr (40 mph) not to exceed 104 km/hr (65 mph) for up to 15 minutes. Heavy accelerations, sudden decelerations and wide open throttles are not recommended. If the scan tool sends out a three pulse beep at any time, the OBD II drive cycle has completed.

If there is only one certain component that hasn't completed its test, there are individual driving conditions to help those tests pass or fail if something is wrong.

SOURCE: my scan tool says p1000 when i look up the codes

Hello, my name is Ben. Here is the short answer: P1000 OBD-II Monitor Testing Incomplete
P1000 will be set anytime there is any interruption of power to the PCM. This action could be but is not limited to, changing the battery, clearing history codes, or reprogramming the PCM. If there are no other codes stored the P1000 will clear itself after several "driving cycles". I hope this helps you, Ben.