AutoCodes – Generic – P1432

P1432 Code - Thermostat Heater Control Circuit Failure

Quick Answer

Thermostat Heater Control (THTRC) Circuit Failure. Common causes include Faulty Thermostat Heater, Thermostat Heater harness is open or shorted, Thermostat Heater circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1432 indicates Thermostat Heater Control Circuit Failure.
Common causes: Common causes include Faulty Thermostat Heater, Thermostat Heater harness is open or shorted, Thermostat Heater circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 12,757

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 22, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1432 Description

Thermostat Heater Control (THTRC) Circuit Failure. The Comprehensive Component Monitor (CCM) monitors the THTRC circuit to the Powertrain Control Module (PCM) for high and low voltage.

OBDII Code P1432 - Thermostat Heater Control Circuit Failure - AutoCodes.com — P1432 Code - Thermostat Heater Control Circuit Failure

What does this mean?

What are the Possible Causes of the DTC P1432?

Faulty Thermostat Heater
Thermostat Heater harness is open or shorted
Thermostat Heater circuit poor electrical connection

How to Fix the DTC P1432?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1432 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1432 code?

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Information for Specific Makes

P1432 Audi — Secondary Air Injection Valve Open
P1432 BMW — Secondary Air Injection System Incorrect Flow Detected
P1432 Buick — Fuel Level Sensor 2 Circuit Low Voltage
P1432 Cadillac — Fuel Level Sensor 2 Circuit Low Voltage
P1432 Chevrolet — Fuel Level Sensor 2 Circuit Low Voltage
P1432 Ford — Thermostat Heater Control Circuit Failure
P1432 GMC — Fuel Level Sensor 2 Circuit Low Voltage
P1432 Honda — Battery Module Overheating
P1432 Lincoln — Thermostat Heater Control Circuit Failure
P1432 Mazda — Thermostat Heater Control Circuit Failure
P1432 Mercury — Thermostat Heater Control Circuit Failure
P1432 Volkswagen — Secondary Air Injection Valve Open

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.