P1390 Code - Timing Belt Skipped One Or More Teeth
Quick Answer
With the engine running, the Powertrain Control Module (PCM) enables the Inhibit condition test every 44 ms and monitors for misalignment between the Camshaft Position (CMP) and Crankshaft Position (CKP) sensors. Common causes include Timing belt has jumped one or more teeth, Loose Camshaft or Crankshaft Position Sensor. 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
- P1390 indicates Timing Belt Skipped One Or More Teeth.
- Common causes
- Common causes include Timing belt has jumped one or more teeth, Loose Camshaft or Crankshaft Position Sensor.
- 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 P1390 Description
What are the Possible Causes of the DTC P1390?
- Timing belt has jumped one or more teeth
- Loose Camshaft or Crankshaft Position Sensor
How to Fix the DTC P1390?
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 P1390 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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Information for Specific Makes
- P1390 Acura — G-Sensor Intermittent Voltage Low
- P1390 Buick — Wheel Speed Sensor 1 G-Sensor Circuit
- P1390 Cadillac — Wheel Speed Sensor 1 G-Sensor Circuit
- P1390 Chevrolet — Wheel Speed Sensor 1 G-Sensor Circuit
- P1390 Chrysler — Timing Belt Skipped One Or More Teeth
- P1390 Dodge — Timing Belt Skipped One Or More Teeth
- P1390 Ford — Octane Adjust Out of Self-Test Range
- P1390 GMC — Wheel Speed Sensor 1 G-Sensor Circuit
- P1390 Honda — G-Sensor Intermittent Voltage Low
- P1390 Isuzu — G Sensor Circuit Intermittent Voltage Low- Rough road sensor
- P1390 Jeep — Timing Belt Skipped One Or More Teeth
- P1390 Lincoln — Octane Adjust Out of Self-Test Range
- P1390 Mazda — Octane Adjust Out of Self-Test Range
- P1390 Mercury — Octane Adjust Out of Self-Test Range
- P1390 Mitsubishi — Timing Belt Skipped 1 Tooth Or More
- P1390 Saab — Misfire Detected Random Fuel Level Low
Frequently Asked Questions about P1390 Code
1. What are the common symptoms of OBDII code P1390 (Timing Belt Skipped One Or More Teeth)?
- Common symptoms include rough idle, poor engine performance, misfires, and potential engine stalling.
2. What are the possible causes of OBDII code P1390?
- The code may be triggered by a misaligned or worn timing belt, a faulty camshaft or crankshaft position sensor, or issues with the timing belt tensioner.
3. How serious is OBDII code P1390 (Timing Belt Skipped One Or More Teeth)?
- This code is serious as it indicates a problem with the engine timing, which can lead to further engine damage if not addressed promptly.
4. Can driving with OBDII code P1390 cause further damage to the vehicle?
- Yes, driving with this code can potentially cause damage to the engine valves and pistons due to the misalignment of the timing belt.
5. How is OBDII code P1390 diagnosed?
- The code is diagnosed using a scan tool that retrieves the code and allows for further inspection of the timing components and sensors.
6. What are some repair tips for OBDII code P1390?
- It is recommended to inspect the timing belt and related components for wear or misalignment, replace any faulty sensors, and properly align the timing belt according to the manufacturer's specifications.
7. Can I repair OBDII code P1390 at home, or is professional help needed?
- While some basic diagnosis can be done at home, repairing OBDII code P1390 often requires specialized tools and expertise, so it is recommended to seek professional help.
8. How much does it typically cost to repair OBDII code P1390?
- The cost of repair can vary depending on the extent of the damage and the specific components that need to be replaced, but it can range from a few hundred to over a thousand dollars.
9. Can resetting the OBDII code P1390 temporarily solve the issue?
- Resetting the code may temporarily turn off the check engine light, but the underlying issue causing the code will still need to be addressed to prevent further damage.
10. How often should the timing belt be inspected to prevent OBDII code P1390 from occurring?
- It is recommended to follow the manufacturer's guidelines for timing belt replacement and have it inspected regularly, typically every 60,000 to 100,000 miles, to prevent issues like OBDII code P1390.
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