DTC P1228 - Barometric Pressure Below Minimum Threshold
Conditions for setting dtc P1228
| ￭ | Engine Running |
| ￭ | Barometric Pressure Sensor ≤ 1.51 psi |
| ￭ | The above must be present for a period of 128 instances/cycles or greater to trigger DTC P1228 |
|
Step |
Action |
Value (s) |
YES |
NO |
|
1 |
- Key on, Engine running - Within VCM Live, open the Baro sensor DTC Minimum parameter, does the Baro sensor parameter display 1.51 psi or less? |
≤ 1.51 psi |
Go to Step 2 |
Intermittent Issue (Refer to Intermittent Diagnostics) |
|
2 |
- Disconnect the Baro pressure sensor connector and ECU connector "C" - Check for continuity between Baro pressure sensor low reference cavity 1 and ECU ground C12-1 - Do you have continuity? |
|
Go to Step 3 |
Repair the circuit as necessary, locate any wires that need to be repaired or replaced |
|
3 |
- Disconnect the Baro pressure sensor connector and ECU connector "C" - Check for continuity between Baro pressure sensor 5 volt reference cavity 2 and ECU 5v C12-2 - Do you have continuity? |
|
Go to Step 4 |
Repair the circuit as necessary, locate any wires that need to be repaired or replaced |
|
4 |
- Disconnect the Baro pressure sensor connector and ECU connector "C" - Check for continuity between Baro pressure sensor signal cavity 3 and ECU connector "C" pin 29 - Do you have continuity? |
|
Go to Step 5 |
Repair the circuit as necessary, locate any wires that need to be repaired or replaced |
|
5 |
- Disconnect the Baro pressure sensor connector and ECU connector "C" - Check for any physical damage, corrosion, or contamination of any of the pins - Any issues found? |
|
Repair any pins and circuit as necessary. |
Go to Step 6 |
|
6 |
- Replace the Baro Pressure Sensor - Is the replacement complete? |
|
Go to Step 7 |
N/A |
|
7 |
- 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 DTC's? |
|
System is now operational and ready to be tuned |
Contact HP Tuners Support |
Table 36. Barometric Pressure Below Minimum Threshold Diagnostics Table
