P01C9

Fuel Rail/System Pressure - Too High Bank 2

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Power Loss
Over-enrichment of the mixture (black exhaust)
Unstable idling
Increased fuel consumption

Causes

Fuel pressure regulator malfunction
Clogged fuel lines or filter
Problems with the fuel pump
Fuel pressure sensor malfunction
Problems with the engine ECU

How to Fix

Diagnostics of fuel pressure with a pressure gauge
Checking the fuel pressure regulator
Inspection of fuel lines for blockages
Fuel pump testing
Checking the fuel pressure sensor and its circuit
Scanning the ECU for other errors

Related codes

P01CA P0172 P0087