Fuel Pump System
P1229 — Fuel Pump System
System: Powertrain | Type: Manufacturer-Specific | Make: Toyota
P1229 is a manufacturer-specific powertrain diagnostic trouble code recorded for Toyota vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.
Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.
P1229 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.
This DTC is set when the Engine Control Module (ECM) detects an abnormal drop in fuel pressure under engine load conditions, indicating a fuel delivery issue. The ECM monitors fuel pressure through the fuel pressure sensor and compares it against target values based on engine speed and load. If the actual pressure is too low for a calibrated period—suggesting fuel starvation or pump malfunction—the ECM logs P1229.
Detailed possible causes for P1229 are available to TaT members.
Unlock with Free TrialStep-by-step diagnostic guidance for P1229 is available to TaT members. Our Diagnostic Assistant provides professional-level troubleshooting procedures written by experienced technicians.
Unlock with Free Trial| Code | P1229 |
| System | Powertrain |
| Type | Manufacturer-Specific |
| Make | Toyota |
| Causes | Available |
| Diag. Assistant | Available |
| Video | — |
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