DTC P1842 - Transmission Line Pressure Below Minimum Threshold🔗
Conditions for Setting DTC P1842🔗
- Engine Running
- Transmission Line Pressure Sensor ≤ 1.51 psi
- The above must be present for a period of 128 instances/cycles or greater to trigger DTC P1842
Diagnostic Steps🔗
| Step | Action | Value(s) | YES | NO |
|---|---|---|---|---|
| 1 | - Key on, Engine running - Within VCM Live, open the Trans Pressure Sensor DTC Minimum parameter, does the Trans pressure sensor parameter display 1.51 psi or less? |
≤ 1.51 psi | Go to Step 2 | Intermittent Issue - Refer to Intermittent Diagnostics |
| 2 | - Disconnect the trans line pressure sensor connector and the sub harness connector - With a DVOM check for continuity between the trans pressure control solenoid valve pin 3 & cavity "C" |
Go to Step 3 | Repair the circuit as necessary, locate any wires that need to be repaired or replaced | |
| 3 | - Disconnect the trans line pressure sensor connector and the sub harness connector - With a DVOM check for continuity between the trans line pressure low reference pin 12 & cavity "D" |
Go to Step 4 | Repair the circuit as necessary, locate any wires that need to be repaired or replaced | |
| 4 | - Inspect the Trans Line Pressure Sensor connector and pins for corrosion, contamination or any physical damage. - Any issues found? |
Repair any issues found and retest. | Go to Step 5 | |
| 5 | - Replace the Trans Pressure Sensor - Is the replacement complete? |
Go to Step 6 | N/A | |
| 6 | - Clear any DTC from the ECU - Turn the ignition off and wait 30 seconds - Start the engine and operate the engine to full operating temperature - Observe the Check Engine Light on the Menu bar in VCM Live - After operating the engine within the test parameters, check for any store codes - Does the engine operate without any stored DTCs? |
System is now operational and ready to be tuned | Contact HP Tuners Support |