2015 Ram 1500 5.7L/66RFE "Auction Rat" with 140,000 miles, DTC P062A which is basically a fuel pump control performance DTC.
Has had a whole barrage of parts thrown at it.....
*Fuel Pump Control Module
*Fuel Pump
*TIPM (Totally Integrated Power Module)
*Powertrain Control Module
*Fuel Pressure Sensor
It will only set P062A on a cold start intermittently
I caught it acting up yesterday morning, Fuel pressure would spike high as 97 PSI then dip to 30 PSI in a oscillating fashion roughly 3 times....Then the pressure would level out & not act up again.
Installed a mechanical pressure gauge so I could sanity check the fuel pressure sensor this morning.
As luck would have it.....It acted up exactly one time, Wasn't even enough to set P062A. But I caught it nonetheless.
The mechanical gauge was steady @57 PSI, But the sensor spiked to 83 PSI & of course the FPCM/PCM responded by cutting the duty cycle to the pump & pressure on the mechanical gauge plummeted to near zero. Then the sensor PID went down to @30 PSI.
Duty cycle kicked back up & everything synced back to @57 PSI.
I recorded a video for you guys, But it was after it acted up (Expecting it to do it again). Toward the end I purged the pressure off trying to jog the sensor....But you can at least see the pressure drop & duty cycle rise.
Ordered a fuel pressure sensor from my local Dodge dealer, Also needed a different connector for the updated sensor.