AutoCodes – Mazda – P1288 Mazda

P1288 Mazda Code - Cylinder Head Temperature Sensor Out of Self-Test Range

Quick Answer

The Cylinder Head Temperature (CHT) Sensor is mounted into the wall of the cylinder head and is not connected to any coolant passages. Common causes include Wrong thermostat, Not at operating range, Engine overheated. 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: P1288 Mazda indicates Cylinder Head Temperature Sensor Out of Self-Test Range.
Common causes: Common causes include Wrong thermostat, Not at operating range, Engine overheated.
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 8,380

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Dec 23, 2021

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1288 Mazda Description

The Cylinder Head Temperature (CHT) Sensor is mounted into the wall of the cylinder head and is not connected to any coolant passages. The CHT sends a signal to the Powertrain Control Module (PCM) indicating the cylinder head temperature. If the temperature exceeds 126°C (-258°F), the PCM disables four fuel injectors at a time. The PCM will alternate which four injectors are disabled every 32 engine cycles. The four cylinders that are not being fuel injected act as air pumps to aid in cooling the engine. If the temperature exceeds 154 °C (310°F), the PCM disables all of the fuel injectors until the engine temperature drops below 154°C (310°F).

OBDII Code P1288 Mazda - Cylinder Head Temperature Sensor Out of Self-Test Range - AutoCodes.com — P1288 Mazda Code - Cylinder Head Temperature Sensor Out of Self-Test Range

What does this mean?

What are the Possible Causes of the DTC P1288 Mazda?

Wrong thermostat
Not at operating range
Engine overheated
Low engine coolant level
Faulty Cylinder Head Temperature (CHT) sensor
Cylinder Head Temperature sensor harness is open or shorted
Cylinder Head Temperature sensor circuit poor electrical connection

How to Fix the DTC P1288 Mazda?

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 does this mean?

Code Tech Notes

This indicates the Cylinder Head Temperature (CHT) sensor is out of the Self-Test range. The engine is not at a normal operating temperature.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1288 Mazda 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 P1288 Mazda code?

Need more information on how to fix the P1288 Mazda code? Get Access to Factory Service Manuals

Need Help with the Code?

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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.

Frequently Asked Questions about P1288 Mazda Code

1. What does the OBDII code P1288 mean on a Mazda?

P1288 indicates that the Cylinder Head Temperature (CHT) sensor is reporting a temperature outside the expected range during a self-test, suggesting a potential issue with the sensor or related components.

2. What are the common symptoms of code P1288 in a Mazda?

Symptoms may include the check engine light turning on, engine overheating, poor engine performance, rough idle, or even the engine entering limp mode.

3. What causes the P1288 code on a Mazda?

Common causes include a faulty CHT sensor, damaged or corroded wiring or connectors, a stuck thermostat, low coolant levels, or an overheating engine.

4. Can I drive my Mazda with a P1288 code?

Itâ€™s not recommended to drive with this code as it may indicate an overheating engine, which can cause severe damage if ignored.

5. How do I diagnose the P1288 code on a Mazda?

Start by checking the coolant level, inspecting the CHT sensor and its wiring for damage, testing the thermostat operation, and scanning for additional codes that may indicate related issues.

6. How can I fix the P1288 code on a Mazda?

Repairs may include replacing the CHT sensor, repairing damaged wiring, cleaning corroded connectors, refilling coolant, or replacing a faulty thermostat.

7. Where is the Cylinder Head Temperature (CHT) sensor located?

The CHT sensor is typically located on the cylinder head, often near the thermostat housing, but its exact location can vary by engine model.

8. Can a stuck thermostat trigger the P1288 code in a Mazda?

Yes, a stuck thermostat can cause the engine to overheat or run too cold, which could result in the CHT sensor reading outside its expected range.

9. How much does it cost to fix the P1288 code on a Mazda?

Repair costs can vary widely, ranging from $50 to $150 for a new CHT sensor, plus labor, or more if additional components like the thermostat need replacement.

10. Will clearing the P1288 code fix the problem on my Mazda?

Clearing the code will turn off the check engine light temporarily, but the underlying issue must be resolved to prevent the code from returning.