Toyota Error Code P1340: How to Fix It

Medium 1-2 hours High Severity Verified June 2026
Error Code
P1340
Brand
Toyota
Product Type
automotive
Severity
High
DIY Difficulty
Medium
Estimated Fix Time
1-2 hours
Toyota error code P1340 indicates the Camshaft Position (CMP) sensor circuit is not receiving a signal from the sensor. This high-severity issue can cause poor engine performance, rough idling, stalling, or prevent the engine from starting altogether.
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Tools You'll Need

How to Fix Error Code P1340

  1. Turn off engine and ensure safety

    Never work on a hot engine - components can cause severe burns. Ensure the engine is completely cool before starting.
  2. Connect OBD2 scanner and verify code

  3. Locate the camshaft position sensor

  4. Inspect wiring and connector

    Disconnect the battery negative terminal before handling electrical connections to prevent short circuits.
  5. Clean and reconnect the sensor

  6. Test the sensor with multimeter

  7. Check sensor air gap

  8. Replace sensor if faulty

    Do not overtighten the sensor mounting bolt as this can damage the sensor housing or engine case.
  9. Clear codes and test drive

Parts You May Need

Camshaft Position Sensor
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Electrical Contact Cleaner
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Anti-seize Compound
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Camshaft Position Sensor
Check Price on Amazon
Electrical Contact Cleaner
Check Price on Amazon
Anti-seize Compound
Check Price on Amazon
Camshaft Position Sensor
Check Price on Amazon
Electrical Contact Cleaner
Check Price on Amazon
Anti-seize Compound
Check Price on Amazon
Camshaft Position Sensor
Check Price on Amazon
Electrical Contact Cleaner
Check Price on Amazon
Anti-seize Compound
Check Price on Amazon
Camshaft Position Sensor
Check Price on Amazon
Electrical Contact Cleaner
Check Price on Amazon
Anti-seize Compound
Check Price on Amazon
Camshaft Position Sensor
Check Price on Amazon
Electrical Contact Cleaner
Check Price on Amazon
Anti-seize Compound
Check Price on Amazon
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When to Call a Professional

Contact a qualified mechanic if the wiring harness requires extensive repair, if multiple sensors are failing simultaneously, or if the code returns after sensor replacement. Also seek professional help if you're uncomfortable working with electrical components or if the engine has timing-related issues.

Frequently Asked Questions

Can I drive with Toyota error code P1340?
You should not drive with code P1340 as it can cause engine stalling, poor performance, and potential damage to other engine components. Have it diagnosed and repaired as soon as possible.
How much does it cost to fix Toyota P1340?
DIY repair typically costs $50-150 for a new CMP sensor. Professional repair can range from $200-400 including parts and labor, depending on accessibility and whether wiring repair is needed.
What causes Toyota P1340 error code?
Common causes include a faulty camshaft position sensor, damaged wiring, corroded connections, incorrect sensor air gap, or contamination on the sensor tip from oil or debris.
Will P1340 cause my Toyota to not start?
Yes, code P1340 can prevent your Toyota from starting or cause it to stall while driving, as the engine control module needs the camshaft position signal to properly time ignition and fuel injection.
How do I know if my CMP sensor is bad?
Signs of a bad CMP sensor include engine stalling, rough idling, poor acceleration, difficulty starting, and the P1340 code. A multimeter test showing readings outside 500-1500 ohms typically confirms a faulty sensor.