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Code C1122

Quick reference

C1122 at a glance

Plain-language meaning
This code means that the computer that helps control the power steering in the car has detected a problem with its own system checks. It's like when your computer freezes and you have to restart it.
Urgency
High – Steering issues can affect vehicle control and safety.
Difficulty
Moderate
System
Control Module Issue
Tools mentioned
OBD-II scanner, Multimeter, Diagnostic software for module reprogramming

This summary uses the existing diagnostic information shown in full below.

Laymans terms

This code means that the computer that helps control the power steering in the car has detected a problem with its own system checks. It's like when your computer freezes and you have to restart it.

Explanation

The Power Steering Control Module has a built-in system to check its own operations. If it detects an issue with these checks, it triggers the C1122 code.

Technical description

The C1122 code indicates that the Power Steering Control Module has encountered an error in its watchdog function, which is responsible for monitoring the module's operations and ensuring it is running correctly. This error suggests a potential malfunction in the module's ability to self-monitor.

Symptoms

• Loss of power steering assist

• Steering wheel is hard to turn

• Warning light on the dashboard

Common Causes

• Faulty Power Steering Control Module

• Software glitch in the module

• Electrical issues such as poor connections or damaged wiring

Glossary

Power Steering: A system that helps drivers steer by augmenting steering effort of the steering wheel.

Watchdog: A system that monitors and checks the operations of a device or program.

Diagnosis steps

• Check for any other related codes

• Inspect the wiring and connections to the Power Steering Control Module

• Test the Power Steering Control Module for proper operation

Repair procedures

• Repair or replace damaged wiring or connectors

• Update or reflash the module software

• Replace the Power Steering Control Module if necessary

Tools required

• OBD-II scanner

• Multimeter

• Diagnostic software for module reprogramming

Estimated repair cost

$200 - $800

Difficulty level

Moderate

Commonly affected vehicles

• Ford F-150

• Chevrolet Silverado

• Toyota Camry

Preventive measures

• Regularly check the power steering fluid level

• Inspect electrical connections periodically

• Keep software updated

Error code type

Control Module Issue

User experience recommendations

• Do not drive the vehicle without power steering

• Seek professional diagnostic services if unsure

Warranty information

Check vehicle warranty for coverage on electronic control modules

Historical data

This code has been associated with vehicles using electronic power steering systems since the early 2000s.

Urgency level

High – Steering issues can affect vehicle control and safety.

Testing conditions

• Vehicle ignition in the ON position

• Steering inputs applied to check system response

Component location

The Power Steering Control Module is typically located under the dashboard or near the steering column.

FAQs

Q: Can I drive with a C1122 code?
A: It's not recommended, as steering may be impaired, affecting safety.

Q: Will resetting the code fix the problem?
A: Resetting may clear the code temporarily, but the underlying issue needs to be addressed.

Optional diagnostic gear

Tools that may help diagnose C1122

FOXWELL Multi-System Scanner diagnostic tool illustration

Pro · Four-system diagnostics

FOXWELL Multi-System Scanner

A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.

Chassis and ABS faults usually need a scanner that can read brake-system data directly.

View on Amazon
EPAuto 1/2" Torque Wrench diagnostic tool illustration

Universal · Torque wrench

EPAuto 1/2" Torque Wrench

Useful when reassembly torque matters for wheel, suspension, and under-hood fasteners.

Useful when wheel, hub, or suspension hardware needs correct reassembly torque.

View on Amazon
MaxxHaul Vehicle Ramps diagnostic tool illustration

Universal · Drive-on ramps

MaxxHaul Vehicle Ramps

Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.

Helpful for safer access during underbody inspection work.

View on Amazon

These are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.

Source: ezOBD2 diagnostic database
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