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.
2010 Infiniti M45 BaseFACTORY OEM SERVICE PROCEDURE
P0850 - P1421
DTC REFERENCE CHART
| DTC(1) | Items (CONSULT-III screen terms) | |||||||
|---|---|---|---|---|---|---|---|---|
| CONSULT-III GST(2) | ECM(3) | |||||||
| P0850 | 0850 | P-N POS SW/CIRCUIT | ||||||
| P1140 | 1140 | INTK TIM S/CIRC-B1 | ||||||
| P1145 | 1145 | INTK TIM S/CIRC-B2 | ||||||
| P1148 | 1148 | CLOSED LOOP-B1 | ||||||
| P1168 | 1168 | CLOSED LOOP-B2 | ||||||
| P1211 | 1211 | TCS C/U FUNCTN | ||||||
| P1212 | 1212 | TCS/CIRC | ||||||
| P1217 | 1217 | ENG OVER TEMP | ||||||
| P1220 | 1220 | FPCM/CIRCUIT | ||||||
| P1225 | 1225 | CTP LEARNING-B1 | ||||||
| P1226 | 1226 | CTP LEARNING-B1 | ||||||
| P1421 | 1421 | COLD START CONTROL | ||||||
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Factory Service Tools
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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.
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