Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Infiniti G25 BaseFACTORY OEM SERVICE PROCEDURE
Engine Control System - DTCS P1148 To P2A03
- DTC P1148, P1168: Closed Loop Control
- DTC P1211: TCS Control Unit
- DTC P1212: TCS Communication Line
- DTC P1217: Engine Over Temperature
- DTC P1225, P1234: TP Sensor
- DTC P1226, P1235: TP Sensor
- DTC P1233, P2101: Electric Throttle Control Function
- DTC P1236, P2118: Throttle Control Motor
- DTC P1238, P2119: Electric Throttle Control Actuator
- DTC P1239, P2135: TP Sensor
- DTC P1290, P2100, P2103: Throttle Control Motor Relay
- DTC P1550: Battery Current Sensor
- DTC P1551, P1552: Battery Current Sensor
- DTC P1553: Battery Current Sensor
- DTC P1554: Battery Current Sensor
- DTC P1564: ASCD Steering Switch
- DTC P1572: ASCD Brake Switch
- DTC P1574: ASCD Vehicle Speed Sensor
- DTC P1715: Input Speed Sensor
- DTC P1805: Brake Switch
- DTC P2122, P2123: App Sensor
- DTC P2127, P2128: App Sensor
- DTC P2138: App Sensor
- DTC P2A00, P2A03: A/F Sensor 1
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.