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P0637

Overview

Code

P0637

Code Type

P

Code Class

P0

System

Engine

Severity Level

High

Emissions Related

true

Drivability Impact

Major

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0637 indicates a malfunction in the fuel rail pressure sensor circuit

Symptoms

Poor engine performance; Stalling

Overview applies to this diagnostic code.

Affected Systems

On This Page

  • Code Definition

  • Symptoms

  • Affected Systems

  • Possible Causes

  • Diagnostic Steps

  • Drive Safety Notes​

More Resources

Fuel rail pressure sensor

Possible Causes

Faulty fuel rail pressure sensor; Fuel pump failure

Diagnostic Steps

1 Inspect fuel rail pressure sensor 2 Test sensor output

Drive Safety Notes

Inconsistent fuel rail pressure can severely affect engine operation

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