Oops. I put in "fuel pump check valve"

Here's CPL's link and his was the pump.......https://www.f150forum.com/f6/98-4-6-...348813/index5/

 

I read that link and his issue was slow starting. My truck never has slow start. it always starts quick, just bump the key quick. FORScan is showing a code B1202 in the instrument cluster. And says open circuit fuel sender but when I look on the web it says passenger seat belt? Fuel gauge works fine.

 

For 1999 Ford F150 P1202 I get, injector circuit open\shorted cylinder #2.

EDIT: Oops, sorry, B1202, fuel sender circuit open.

B1202 Code Meaning :B1202

OBD-II Diagnostic Body

B-Trouble Code For Engine
1-Fuel And Air Metering
2-Manifold Absolute Pressure/Barometric Pressure Circuit High Input
0-Cold Start Injector 1 Malfunction
2-Glow Plug/Heater Circuit 'A' Malfunction

http://b1202.enginetroublecode.com/ford-f-150-heritage

 

Click-bait website. Everything on that page regarding this DTC is bogus. Suggest using ONLY Ford's documentation, not whatever Google happens to dredge up.

If there is no known issue with the fuel gauge, then the retrieved fault code is likely spurious and should be set aside. It would have no effect on the operation of the vehicle unless of course, it either caused the thing to run out of fuel due to mis-reporting the fuel level or, perhaps, a mis-reporting of fuel level disabled certain OBDII self-test monitors that require fuel level to be within a certain range before execution.

 

Pretty good click bait considering Ford says exactly the same thing?????

Then again, wasn't it you that wanted to see manual information and page numbers and then AK posted pics of the page showing some fairly basic information you said didn't exist?????

Wasn't it also you that stated a relay couldn't be a PCM problem because you saw the problems happening farther downstream from the relay? Apparently suggesting a relay has no effect on a circuit if it's up and running. "The relay can't be the problem because the relay makes no difference once it's already switched the circuit to the necessary voltage. That "click" you hear can't come from the 12v keep alive power in the circuit followed by nothing coming from the PCM." Paraphrasing your apparent assumptions.

"The PCM Power Relay would have zero effect on the operation of the starter or the power supplied to accessory subsystems. You're too far downstream." Your words.

Funny how when the schematic is examined it shows the starter circuit being part of the circuit for the neutral safety switch or the switch jumper for the automatic transmission control and the PCM. Hmmm.

The above is also a reason why it's worthwhile to check fuses even though you berated the person who made the suggestion.

Everyone taking the time to make suggestions or give opinions here is trying to be helpful. Sometimes it's worth keeping that in mind. FWIW, look up what B codes are if your assumption is they don't have anything to do with the engine or systems supporting engine operation. In fact, don't assume anything pre-2007 having to do with codes if you're thinking that the source location of a code means that the problem is located at the point it's being picked up at. The 1999, 4.2 was still on the old Ford SCP protocols. Ensure your information is based on the correct protocols.

 

Let me throw some water on this. In our GEN 10's the B1202 is a body code, run thru the GEM. This code shows that the sensor is not seeing a full reading at the module, and thus throwing a light. This can be the wiring connector or the wiring itself or the sensor.

Does the air bag light illuminate while driving KD?

 

No air bag light. And that code is in the instrument cluster modual. My truck had a solid bench seat, and I put bucket seats from a 97 expy, so there is no sensor for the passenger seat.

 

This is exactly why the protocol ISO 15765-4 was adopted and mandated to be in every US vehicle by 2008. Early fault codes were ambiguous and this is a good example of it. B1202 concerns the fuel sending unit yet you're seeing it through the instrument cluster. ISO 15765-4 redefined the J1979 hexadecimal coding structure and what's called services. It's the service definitions that prevents a fuel sending unit fault from showing up in the instrument cluster in later vehicles. The code is not defined by Ford, it's defined by SAE and ISO (ISO = international) and if you learn the rather intensive coding structure you don't need to look up what codes mean. It's all there in the code. The codes are not arbitrarily assigned by the next number up. Actually it's not even about the fault code number. They're about what they translate to in the hexadecimal language. If anyone is interested look in to the history of PID coding and structure. When dealing with pre-07\08 vehicles awareness is necessary that vehicles built after 98 IIRC started transitioning the coding system for the coming mandated standard. All the manufacturers used this transition period as an R&D and testing period for the mandates. Ford addressed this I think in the emissions manuals of the time.

 

My problem is bad gas
Question for AK what tank do I need 1999 f150 scab 4.2

 

Bad gas? Fuel tank pressure problem for sure. As far as the tank goes I don't think it matters on the truck as long as the capacity is the same and it's for a RWD or 4x4 to match your truck.