Generic OBDII P Codes P0600-P0699: Definitions and causes

Learn the code definitions and most common causes for Generic OBDII P Codes P0600-P0699

This post lists the most common trouble codes in the OBDII P Codes P0600-P0699 category. These are Computer Output Circuit trouble codes. Start by reading the most common codes and causes and then refer to the code chart at the end of the post for official code definitions.

I’ll start by discussing the most common Trouble codes in this group, along with the most common causes of those codes. If you’d like a full list of the codes in this group, scroll to the bottom of this article.

How to find your P Codes P0600-P0699

definition

There are 207 600-series codes. There are several ways to find the code definition in the chart below.

1) Enter the trouble code in the search box. That’s the fastest way
2) If you’d like to scroll all the codes, change the Number of entries to show on the page in “Show Entries” box. Click NEXT or PREVIOUS at the bottom right of the table

This graphic shows the three ways you can navigate the refrigerant chart: 1) Increase the number of entries, enter the year of your vehicle in the search box, or scroll the chart using the next/previous buttons at the bottom of the chart

Learn the most common codes in the P0600-P0699 category and their causes

P0601 is a common code

A P0601 is defined as: Internal Control Module Memory Check Sum Error. This means there is an internal fault with the ECM. A shop can try reprogramming the ECM but in most cases this code means the ECM must be replaced.

P0627-P062A are fairly rare codes

P0627 Fuel Pump “A” Control Circuit /Open, P0628 Fuel Pump “A” Control Circuit Low, P0629 Fuel Pump “A” Control Circuit High, P062A Fuel Pump “A” Control Circuit Range/Performance.

The most common cause

Most light model vehicles use a fuel pump driver module to control the fuel pump. The fuel pump driver module varies the amount of power to the electric fuel pump to match the fuel pump’s output and pressure to the current driving conditions. These codes mean that the ECM is receiving data from the fuel pump driver module that is out of specification. In most cases the cause is a faulty fuel pump driver module.

P0635-P0637 are common codes

P0635 Power Steering Control Circuit, P0636 Power Steering Control Circuit Low, P0637 Power Steering Control Circuit High

These codes relate to the vehicle’s electric power steering system. The power steering control module is reporting values to the ECM that are out of specification.

The Most Common Causes

Depending on the vehicle these codes can be caused by a low battery or a faulty electric power steering control module. In more serious cases the cause is a bad electric power steering rack

P065E-P0665 are common codes

P065E Intake Manifold Tuning Valve Performance Bank 1, P065F Intake Manifold Tuning Valve Performance Bank 2, P0660 Intake Manifold Tuning Valve Control Circuit/Open Bank 1, P0661 Intake Manifold Tuning Valve Control Circuit Low Bank 1, P0662 Intake Manifold Tuning Valve Control Circuit High Bank 1, P0663 Intake Manifold Tuning Valve Control Circuit/Open Bank 2, P0664 Intake Manifold Tuning Valve Control Circuit Low Bank 2, P0665 Intake Manifold Tuning Valve Control Circuit High Bank 2

These codes relate to the manifold tuning valves located in the intake manifold. Carmakers use flaps inside the intake manifold to increase or decrease the length of each runner to reduce ai turbulence. The tuning valves or flaps are operated by an electric actuator and sensor. The code means that the flap has not moved in the way it was commanded by the ECM.

The most common causes

In most cases the cause is a faulty electric actuator and is a fairly simple repair. In some cases the cause can be a binding flap or broken linkage.

©, 2024 Rick Muscoplat