WRENCHIFY
Quick decodeBack to home
All codes/P036A

P036A

Ignition G Control Signal Circuit/Open

High severity

The ignition G control signal circuit is open — typically the PCM drive line for the first ignition coil group has lost continuity.

The ignition G control signal circuit is open — typically the PCM drive line for the first ignition coil group has lost continuity.

Common causes

  • Open wire between PCM and coil

    One of the most commonly reported causes for this code — check this first.

    high

    Typical part cost: $70-550

  • Pin pushed back out of connector body

    Less common, but worth ruling out after the more likely causes.

    low

    Typical part cost: $70-550

  • See all causes + fix costs

    Create a free Wrenchify account to unlock the rest for P036A.

    Unlock causes

    Free forever · No credit card

First things to check

  1. 1Confirm the code with a scan tool and check for additional related codes.
  2. 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

Get the full step-by-step diagnosis

Create a free Wrenchify account to unlock the rest for P036A.

Unlock diagnosis

Free forever · No credit card

Tools you may need

Already have a compatible scanner? Use it. If not, a Bluetooth OBD2 adapter can help you confirm engine codes and check supported live sensor data before replacing parts.

Illustration of a Bluetooth OBD2 adapter, not a product photo

Basic checks

Veepeak OBDCheck BLE

A Bluetooth LE adapter for reading standard engine codes and supported live data.

View on Amazon
Illustration of a Bluetooth OBD2 adapter, not a product photo

Regular diagnostics

vgate iCar Pro BLE 4.0

A Bluetooth LE adapter with an automatic sleep feature for routine code and sensor checks.

View on Amazon
Illustration of a Bluetooth OBD2 adapter, not a product photo

Another option

OBDLink CX

A Bluetooth LE adapter to consider when comparing supported vehicles and diagnostic apps.

View on Amazon

Illustrations shown, not product photos. Check vehicle, phone and app compatibility before buying. These adapters do not guarantee access to ABS, airbags or manufacturer-specific systems. Clearing a code does not repair the fault and can reset emissions readiness monitors.

As an Amazon Associate, Wrenchify earns from qualifying purchases. This supports the app at no extra cost to you.

Related codes

See related trouble codes

Create a free Wrenchify account to unlock the rest for P036A.

Unlock related codes

Free forever · No credit card

Frequently asked questions

What does P036A mean?

P036A means "Ignition G Control Signal Circuit/Open". It is a generic OBD-II code that points to a fault in the ignition system or misfire.

What are the most common causes of P036A?

open wire between pcm and coil; pin pushed back out of connector body; cracked solder joint inside the module or sensor — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly. Use the Wrenchify app for a full diagnosis specific to your vehicle.

Get the full P036A diagnosis for your vehicle

Year, make, model + step-by-step repair help — free plan included.

Diagnose P036A