DTC P1229 - Barometric Pressure Above Maximum Threshold🔗
Conditions for Setting DTC P1229🔗
- Engine Running
- Barometric Pressure Sensor ≥ 14.94 psi
- The above must be present for a period of 128 instances/cycles or greater to trigger DTC P1229
Diagnostic Steps🔗
| Step | Action | Value(s) | YES | NO |
|---|---|---|---|---|
| 1 | - Key on, Engine running - Within VCM Live, open the Baro sensor DTC Maximum parameter, does the Baro sensor parameter display 14.94 psi or greater? |
≥ 14.94 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 connector SP3 - 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 connector SP6 - 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 DTCs? |
System is now operational and ready to be tuned | Contact HP Tuners Support |