What does code P1200 mean?

Q: What does code P1200 mean?

Fuel Pump Relay Circuit. P1200 on Toyota vehicles indicates that the engine control module (ECM) has detected an abnormal condition in the fuel pump relay circuit, which controls power to the fuel pump. The ECM monitors the circuit for expected voltage or continuity and sets this code when the signal does not match its programmed parameters, often due to a faulty relay, wiring issue, or ECM driver problem.

DTC codes / Toyota codes / P1200

P1200 · ToyotaFuel Pump Relay Circuit

P1200 on Toyota vehicles indicates that the engine control module (ECM) has detected an abnormal condition in the fuel pump relay circuit, which controls power to the fuel pump. The ECM monitors the circuit for expected voltage or continuity and sets this code when the signal does not match its programmed parameters, often due to a faulty relay, wiring issue, or ECM driver problem.

SystemPowertrain

Code typeToyota specific

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

Guidance is general and written for Toyota vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.