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.
EGR Problem
1992 GMC Magnavan 5.7 KSECTION EGR Problem
EGR valve sticking open at idle is usually accompanied by a rough idle and/or stalling. If Code 45 is intermittent, see INTERMITTENTS in TESTS W/O CODES article.
CODE 45 ECM TERMINAL & CIRCUIT WIRING ID (ALL W/4L80-E A/T)
| Application | ECM Terminal | Wire Color |
|---|---|---|
| O2 Sensor Signal | C14 | Purple |
| O2 Sensor Ground | C13 | Tan |
CODE 45 ECM TERMINAL & CIRCUIT WIRING ID (ALL OTHERS)
| Application | ECM Terminal | Wire Color |
|---|---|---|
| O2 Sensor Signal | D7 | Purple |
| O2 Sensor Ground | D6 | Tan |
RENDER: 1.0x
NO RELATED
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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.