P1637
Read the instructions below then start the fault diagnostic procedure.
Symptom: CHECK ENGINE. Loss of performance.
P1637 |
Fault symptoms
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CHECK ENGINE.
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Loss of performance.
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On-Board Diagnostics
Type of diagnosis:- |
Continuous.
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Enable criteria:
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Ignition ON.
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Battery voltage should be 10.2-15.8 V.
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Fault criteria:
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Voltage on outputs (7, 98) exceeds 4.1 V for more than 0.3 s.
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Dependents:
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None.
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System reaction to a fault:
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EGR and boost pressure control switched off.
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OK report:
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Voltage on outputs falls below 4.1 V for more than 0.3 s.
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Fault handling: (See section Fault handling III, other emissions-related components and functions for more information)
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Type III.
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Diagnostic help
The diagnosis concerns an electrical fault on the voltage output to:- Accelerator pedal position sensor
- EGR solenoid valve
- Charge air pressure sensor
- Position sensor guide rails, turbocharger
- Fuel pressure sensor, fuel rail
Functions in the diagnostic tool related to the fault: