Why is the p023f fuel pump relay open?
The PCM monitors this feedback circuit to ensure that there is proper voltage being sent to the fuel pump. As it activates the fuel pump relay, it expects to see battery voltage on the feedback circuit. If the PCM sees an open condition with the signal when the fuel pump isn’t activated, P023F may set.
What are the symptoms of a p023f DTC?
Symptoms of a P023F DTC may include: MIL (malfunction indicator lamp) illumination Small amount of voltage present on FP (fuel pump) voltage supply circuit due to short Potential causes of a P023F code include:
What is the Transmission Control Module ( TCM )?
The transmission control module (TCM) is a vital component of any vehicle with an automatic transmission system. Rather than relying on hydraulic or mechanical control over a transmission system, newer vehicles use a transmission control module instead.
What causes a Transmission Control Module to fail?
Reply. February 7, 2019 at 2:17 pm. Just like any other computer, failure of the TCM is often due to an electrical issue (such as a voltage overload), water (corrosion builds up and eventually causes a short circuit), or damage due to too much vibration or stress.
The PCM monitors this feedback circuit to ensure that there is proper voltage being sent to the fuel pump. As it activates the fuel pump relay, it expects to see battery voltage on the feedback circuit. If the PCM sees an open condition with the signal when the fuel pump isn’t activated, P023F may set.
Symptoms of a P023F DTC may include: MIL (malfunction indicator lamp) illumination Small amount of voltage present on FP (fuel pump) voltage supply circuit due to short Potential causes of a P023F code include:
How to check for short to ground on PCM FP relay circuit?
Check for a short to ground on the PCM FP relay control (ground driver) circuit by removing the FP relay and ohm between a good ground and the PCM FP relay control. There should be no continuity to ground with KOEO (after the FP pre-cycle is completed).