2007 Ford E350 Rough Idle and Fuel Smell with Codes P0053, P0193, P2195

Working off those codes and symptoms, I’d start with a rich condition from bad fuel pressure data or actual high fuel pressure, with the B1S1 O2 getting dragged into it. P0193 (FRP high input) and the fuel smell line up with that. Second place is a failed B1S1 O2 / heater circuit issue skewing trims and setting P2195/P0053, but the P0193 keeps fuel side at the top of the list.

What separates them is what the FRP PID and trims are doing live.

Most likely culprits

• Fuel rail pressure sensor / FRP circuit issue – P0193, rich smell, rough idle; PCM may be seeing bogus high pressure and over-fueling.
• Bank 1 Sensor 1 O2 sensor / heater fault – P0053 + P2195; bad heater or lazy sensor can lock B1 rich and set stuck-rich code.
• Actual high fuel pressure (regulator / return issue if applicable) – Would give real rich condition, fuel smell, and drive trims negative.

How to narrow it down

1. Pull full scan data at hot idle

   • Look at FRP (psi or kPa), STFT/LTFT B1/B2, O2 B1S1/B2S1 voltages, RPM.
   • If FRP is obviously out of spec for this engine (need your engine size to quote spec) or stuck high while trims are very negative, suspect real high pressure or FRP sensor skewed high.
   • If FRP looks reasonable but B1 trims are pegged and B1S1 is stuck rich, lean toward O2 issue.

2. Verify FRP sensor signal vs mechanical pressure

   • Hook up a fuel pressure gauge on the rail and compare to FRP PID at idle and snap throttle.
   • If gauge and PID disagree (PID high, gauge normal) → FRP sensor or its 5V/signal wiring.
   • If both are actually high → chase regulator / return / restriction on return side.

3. Check FRP sensor wiring for P0193

   • Key on, backprobe FRP:
     • 5V ref on one pin, good ground on another, ~0.5–1.5V signal at KOEO (varies by engine).
   • If signal is pinned near 5V with sensor unplugged → short to VREF or 5V in harness.
   • If signal drops to normal with harness flexed → harness issue near rail/engine.

4. Test B1S1 O2 heater circuit for P0053

   • With sensor unplugged, ohm the heater element across the two heater pins; compare to spec in service info.
   • Check for 12V feed on heater power with KOEO and good ground on the other side.
   • Open heater or no power/ground → fix that first. If power/ground good and resistance out of spec → replace B1S1 O2.

5. Evaluate B1S1 sensor behavior for P2195

   • Hot, closed loop, scope or watch O2 B1S1:
     • Should switch ~0.1–0.9V several times per second at idle.
   • If it’s stuck high (rich) while B2S1 is switching normally and trims are trying to correct → bad B1S1.
   • If both banks show rich and trims are heavily negative, go back to fuel pressure / injectors leaking.

6. Quick mechanical checks

   • Pull plugs on bank 1 – look for wet/fuel-fouled cylinders → possible leaking injector.
   • Check for fuel in vacuum line to any fuel pressure regulator (if external) → ruptured diaphragm causing rich.

7. Smoke test intake / check for exhaust leaks (only if trims suggest)

   • If B1 is lean and B2 normal, think vacuum leak on B1 or pre-O2 exhaust leak.
   • Your codes point rich, so only chase this if trims contradict.

Possible parts (if needed)

• Fuel rail pressure sensor
• Bank 1 Sensor 1 upstream O2 sensor (with heater)
• Fuel pressure regulator / related components (only if mechanical pressure is actually high)
• Leaking injector(s) on bank 1 (if plug readings and balance tests point there)

A few questions

1. Engine size on this E-350 (4.6, 5.4, or other) and fuel pressure spec you’re seeing vs scan PID?
2. What are STFT/LTFT B1 and B2 at hot idle and 2500 rpm, and what do the B1S1/B2S1 O2 waveforms look like?
3. Do the codes reset immediately after clear on a short idle, or only after a drive cycle / under load?

41 psi by itself doesn’t tell me enough on this van without knowing engine and what the FRP PID is doing, but it’s in the ballpark for a 5.4 with returnless. The key now is mechanical vs what the PCM thinks.

I need a couple numbers from you:

1. Engine size – 5.4L 3V is most common on a 2007 E-350. Confirm?
2. FRP PID at hot idle (same time you saw 41 psi on the gauge).
3. STFT/LTFT B1 and B2 at hot idle and ~2500 rpm.
4. B1S1 and B2S1 O2 behavior – switching or stuck? If you can, give voltages or describe (e.g. B1S1 stuck ~0.85V, B2S1 switching).

That’s what decides if we’re chasing fuel pressure/FRP or O2/heater first.

Assuming 5.4L and 41 psi is accurate:

• If gauge ≈ 41 psi and FRP PID also ≈ 41 psi, and trims are heavily negative, you’ve got a real rich condition (injector leak, stuck injector, or PCM over-fueling for some other reason).
• If gauge ≈ 41 psi but FRP PID is way higher and P0193 is set, then the FRP sensor or its wiring is lying, PCM thinks pressure is high and is mismanaging fuel.
• If FRP looks normal and trims on B1 are pegged rich with P0053/P2195, then the B1S1 O2/heater circuit is the first fix.

Next steps I’d do in the bay:

1. Compare gauge vs PID

   • Hot idle, KOER:
     • Note mechanical pressure (you said 41 psi).
     • Note FRP PID.
   • If they don’t match within a couple psi → unplug FRP sensor:
     • If FRP PID drops to a sane default → sensor skewed.
     • If FRP PID stays high → short to 5V in signal circuit.

2. Check FRP sensor circuits

   • KOEO, backprobe FRP:
     • 5V ref present.
     • Good ground.
     • Signal ~0.5–1.5V KOEO (check spec).
   • If signal is near 5V with sensor unplugged → harness short to VREF/5V.

3. O2 heater test for P0053

   • Unplug B1S1:
     • Measure heater resistance; compare to spec.
     • KOEO: verify 12V feed on heater power, good ground on control side.
   • If heater open or way out of spec → replace B1S1.
   • If no power/ground → fix circuit, then re-evaluate P2195.

4. O2 behavior for P2195

   • Hot, closed loop:
     • B1S1 should switch 0.1–0.9V several times/sec.
     • If B1S1 is stuck rich while B2S1 switches and trims are trying to correct → bad B1S1.
     • If both banks rich and trims negative → go back to fuel side.

5. Quick injector check on Bank 1

   • Kill it hot, pull bank 1 plugs:
     • Any wet/fuel-fouled plug → suspect that cylinder’s injector.
   • If you’ve got IDS or equivalent, run injector balance or disable cylinders and watch FRP drop.

Post back with:

• Engine size,
• FRP PID vs your 41 psi,
• B1/B2 trims and O2 behavior,

and I’ll tell you which part to hang first and what to scope next.