P1236 High Pressure Fuel Pump Number 2 Circuit

Category: Powertrain - Fuel/Air Metering
Severity: Check Engine Light
Applies to: V6/V8 Toyota models with dual HP pumps

What does P1236 mean on a Toyota?

P1236 — High Pressure Fuel Pump Number 2 Circuit. This Toyota-enhanced code applies to V6/V8 Toyota models with dual HP pumps.

Common causes of P1236

Failed number 2 HP pump solenoid
Open number 2 pump circuit
Worn number 2 cam follower
Corroded connector
ECM fault

How to fix P1236

Compare bank high-pressure readings
Test number 2 solenoid resistance
Inspect the follower
Check wiring
Replace the pump per bank data