P1508 Lexus Code - PTC AC Auxiliary Heater Disabled High
Quick Answer
P1508 Lexus indicates PTC AC Auxiliary Heater Disabled High. Common causes include Faulty Hybrid Vehicle Converter, Hybrid Vehicle Converter harness is open or shorted, Hybrid Vehicle Converter 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
- P1508 Lexus indicates PTC AC Auxiliary Heater Disabled High.
- Common causes
- Common causes include Faulty Hybrid Vehicle Converter, Hybrid Vehicle Converter harness is open or shorted, Hybrid Vehicle Converter 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.
Code P1508 Lexus Description
What are the Possible Causes of the DTC P1508 Lexus?
- Faulty Hybrid Vehicle Converter
- Hybrid Vehicle Converter harness is open or shorted
- Hybrid Vehicle Converter circuit poor electrical connection
- Faulty Hybrid vehicle control unit
How to Fix the DTC P1508 Lexus?
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 P1508 Lexus 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.
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Frequently Asked Questions about P1508 Lexus Code
1. What does the OBDII code P1508 mean on a Lexus?
P1508 indicates that the PTC (Positive Temperature Coefficient) AC auxiliary heater is disabled due to a high voltage or current issue.
2. What are the common symptoms of code P1508 in a Lexus?
Common symptoms include reduced cabin heating efficiency, potential electrical warnings, or no noticeable symptoms if the heater isn't in use.
3. What causes the P1508 code to appear on a Lexus?
Causes may include a faulty PTC heater, wiring issues such as shorts or open circuits, a malfunctioning relay, or a problem with the control module.
4. Can I drive my Lexus with a P1508 code?
Yes, you can typically drive with this code, but cabin heating may be affected, especially in cold weather.
5. How do I diagnose the P1508 code on a Lexus?
Diagnosis involves checking the PTC heater circuit for continuity, inspecting wiring and connectors, and testing the relay and control module functionality.
6. How can I fix the P1508 code on my Lexus?
Repairs may include replacing the PTC heater, repairing damaged wiring or connectors, or replacing a faulty relay or control module.
7. Is the P1508 code related to the air conditioning system?
No, the code is related to the auxiliary heater used for supplemental cabin heating, not the air conditioning system.
8. Does the P1508 code affect engine performance?
No, this code does not directly affect engine performance but may impact cabin comfort.
9. What tools are needed to troubleshoot the P1508 code?
Tools may include a multimeter, an OBDII scanner, and wiring diagrams specific to your Lexus model.
10. How much does it cost to repair the P1508 code on a Lexus?
Repair costs vary depending on the root cause, but replacing a PTC heater can range from $200 to $500, excluding labor.
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