Is it safe to drive with this code?

Driving with P06AC present may not be safe, as the vehicle can experience sudden stalling, failure to start, or unpredictable behaviour. In some cases the control module may shut down entirely to protect itself from damage. It's advisable to have the vehicle inspected promptly; see our disclaimer for guidance.

This code may affect your MOT result if the malfunction indicator lamp is illuminated at the time of the test. What matters most is whether the warning light is on during the inspection; refer to our site disclaimer for full details.

Roughly how much does it cost to fix?

Repair costs can vary widely. Simple fixes such as repairing connectors or grounds may fall into the low two-figure range, whilst control module reprogramming typically sits in the low to mid three-figure bracket. If module replacement is necessary, costs can reach the high three-figure or even four-figure range, particularly at a main dealer. The final bill depends on whether the fault lies in wiring, software, or the module itself, and whether you use an independent specialist or franchised workshop.

Can I reset the code and keep driving?

Clearing the code without addressing the underlying issue is not recommended. Whilst the warning lamp may temporarily extinguish, the fault will typically return if the control module continues to detect an out-of-range temperature reading, and further driving may risk module failure or leave you stranded.

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← All fault codes | Electrical & Sensors

P06AC

Powertrain

PCM/ECM/TCM Internal Temperature Sensor B Range/Performance

One of the control modules' internal temperature sensors is reporting a reading that falls outside the expected range.

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ⓘ Information only. This page provides general educational information about fault code P06AC. We do not assess the urgency or safety implications of any specific fault. That requires in-person diagnosis by a qualified mechanic. Full terms.

Recommended next steps

Whether a fault is urgent, drivable, or routine depends entirely on the cause on a specific vehicle, and that can only be determined by a qualified mechanic with diagnostic equipment. If a warning light is illuminated, the most reliable next step is professional diagnosis.

What does P06AC mean?

P06AC is a Powertrain (engine, transmission, fuel system) fault code. It indicates: PCM/ECM/TCM Internal Temperature Sensor B Range/Performance.

This is a standardised OBD-II code. The technical definition is the same regardless of the make or model of vehicle, although specific causes and symptoms can vary between vehicles.

About Electrical & Sensors codes

Codes in the Electrical & Sensors category.

P06AC is one of 4,010 codes in this category. Browse all Electrical & Sensors codes →

What we know about P06AC specifically

We record the SAE J2012 standardised definition and the system this code belongs to, but we have not yet published detailed driver-reported symptoms, common causes, or step-by-step diagnostic guidance for P06AC.

Rather than invent that information by generating generic content from a template, we leave it out. For specific guidance, the most reliable sources are:

•your vehicle's own service manual or manufacturer-specific technical bulletins
•a qualified mechanic with a manufacturer-level diagnostic tool
•a marque specialist familiar with your make and model

Codes nearby

Codes adjacent to P06AC in the P-code series. Many fault codes appear together with their neighbours because they relate to the same circuit or component.

P06A8 Sensor Reference Voltage C Circuit Range/Performance

P06A9 Sensor Reference Voltage D Circuit Range/Performance

P06AB PCM/ECM/TCM Internal Temperature Sensor B Circuit

P06AD PCM/ECM/TCM Internal Temperature Sensor B Circuit Low

P06AE PCM/ECM/TCM Internal Temperature Sensor B Circuit High

P06B0 Sensor Power Supply A Circuit Open

Other Electrical & Sensors codes

Other fault codes in the same system as P06AC. The ones with detailed guides have plain-English explanations, symptoms, causes, and diagnostic steps.

B1257

Air Temperature External Sensor Circuit Short To Ground Detailed guide

B1363

DBPT Circuit Short To Ground Detailed guide

B2100

Ignition Run/Start Input Circuit Performance Detailed guide

C2000

Steering Angle Sensor Not Calibrated Detailed guide

P0030

HO2S Heater Control Circuit (Bank 1 Sensor 1) Detailed guide

P0031

Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1) Detailed guide

Spotted an issue or have something to add? Mechanics, technicians, and drivers who have first-hand experience with P06AC can submit a correction or expansion. We review every submission before publishing, mechanic submissions are prioritised.

Information only, not professional advice

The information on this page is provided for general guidance and educational purposes only. It is not a substitute for diagnosis or repair advice from a qualified mechanic. Always verify any fault before paying for repairs. carfaultcodes.co.uk accepts no liability for decisions made based on this information. Full terms →

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