P1229 TOYOTA Possible Causes
- Faulty fuel pressure regulator
- Fuel pressure regulator stuck open
- Defective wiring / fuel pump wiring
- Faulty engine control module (ECM)
How to Fix Code P1229 TOYOTA?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or engine warning light soon to come on)
P1229 TOYOTA Meaning
Fuel must flow through the lines at an ideal pressure for your engine to function properly. A system failure can lead to system overload and an increase in pressure beyond the ideal range. Your Toyota’s fuel system is controlled by the fuel pressure regulator, and most overpressure issues will come from this part or its wiring. When there is a pressure problem in the system, a vehicle engine control module (ECM) fault code is stored; when the issue is excessive pressure, the dashboard will illuminate the SES or check engine light to indicate that code P1229 has been stored in your vehicle’s ECM.