P2545 moderate

Fuel Cutoff Switch Circuit High

The P2545 code means the vehicle's onboard diagnostic system has detected: Fuel Cutoff Switch Circuit High. This is a moderate severity code.

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Keep driving?: Yes, but fix soon
DIY difficulty: moderate
Estimated cost: $50 - $200 (parts and labor)

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Common Symptoms

Fuel pump may run continuously
ECM cannot command fuel shutoff in crash
Check engine light on
No noticeable drivability issues

Probable Causes (Ranked by Likelihood)

Short to voltage in cutoff switch wiring Very High
Fuel cutoff switch stuck in closed position High
Bypass jumper wire installed on switch Moderate
ECM sense circuit receiving constant voltage Low

Step-by-Step Diagnostic Procedure

Check cutoff switch circuit voltage in all key positions
Verify no jumper wire has been installed on switch connector
Test switch by simulating a trip and checking signal change
Inspect wiring for short to battery voltage

Frequently Asked Questions

Is P2545 dangerous?

While the vehicle drives normally, the fuel cutoff safety system may not function in a crash, which is a serious safety concern. Repair promptly.

Why would someone bypass the fuel cutoff switch?

Sometimes a frequently-tripping switch is bypassed as a shortcut. This disables the safety cutoff feature and should be corrected by replacing the faulty switch.

Will P2545 affect my fuel economy?

Not directly. The code indicates the circuit stays high, meaning the fuel pump operates normally but cannot be shut off by the inertia switch in an emergency.