P2196
10-18-2019, 02:42 PM
#1
Member
Thread Starter
P2196
Getting p2196 code with cel. "Stuck rich with high fuel rail voltage". Replaced all 4 o2 sensors since original code said up streams were bad. Any ideas??
10-18-2019, 02:48 PM
#2
Out of the ford WSM
DescriptionA heated oxygen sensor (HO2S) indicating rich at the end of a test is trying to correct for an over-lean condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time.
Possible CausesElectrical:
Possible CausesElectrical:
- Short to VPWR in the harness or HO2S
- Water in the harness connector
- Open/shorted HO2S circuit
- Open UO2SPC circuit
- Corrosion or incorrect harness connections
- Damaged HO2S
- Damaged powertrain control module (PCM)
- Excessive fuel pressure
- Leaking/contaminated fuel injectors
- Leaking fuel pressure regulator
- Low fuel pressure or running out of fuel
- EVAP purge valve stuck open
- Air leaks after the mass air flow (MAF) sensor
- Vacuum Leaks
- Positive crankcase ventilation (PCV) system
- Incorrectly seated engine oil dipstick
- Leaking gasket
- Stuck EGR valve
- Leaking diaphragm or EGR vacuum regulator
- Oil overfill
- Cam Timing
- Cylinder compression
- Exhaust leaks before or near the HO2S(s)
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Spike0180 (10-20-2022)
10-20-2022, 07:36 AM
#6
Calc load at idle should be around 18%. Unplug the tps and see what happens. Might also try unplugging the maf and see if it clears up.I had the same prob with a new maf, and the new one was bad. Now I have one out of the junk yard and running fine.