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1986 Pontiac Grand Am, IC Circuit Waveform
This DREF failure was caused by a weak dist pickup signal. Note how the EST signal is present without the DREF.
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| Engine | 2.5 L / 4 cyl |
| Subsystem | ECM/Inputs/Outputs |
| Component | |
| Condition | Known Bad |
References
Vehicle Data
1986 Pontiac Grand Am 2.5L
| Engine | 2.5 L / 4 cyl |
| Subsystem | ECM/Inputs/Outputs |
| Component | |
| Condition | Known Bad |
Video