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P0340CriticalEngine

P0340: Camshaft Position Sensor Circuit Malfunction

26 vehicles · 13 makes · $40-$5,000 repair

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Most Reported On

2001-2006Acura MDXBase, Touring2002-2009GMC Envoy2011-2017Hyundai Elantra2009-2014Nissan Cube1993-1997Volvo 850

P0340 is an OBD-II diagnostic trouble code meaning “Camshaft Position Sensor Circuit Malfunction.” The camshaft position sensor is not sending a valid signal to the ECU. Can cause rough running, misfires, or no-start. This code is most commonly reported on 2001-2006 Acura MDX (Base, Touring), 2002-2009 GMC Envoy, and 2011-2017 Hyundai Elantra, plus 23 other vehicles, with repair costs ranging from $40 to $5,000.

On This Page

  • Common Causes
  • Repair Cost
  • Vehicles (26)
  • Related Codes
  • FAQ
  • Sources (12)

Makes

  • Acura1
  • Cadillac1
  • Ford3
  • GMC1
  • Honda2
  • Hyundai1
  • Infiniti7
  • Jeep1
  • Kia1
  • Nissan6
  • Opel1
  • Saturn1
  • Volvo2
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Common Causes

1Failed camshaft position sensor
2Damaged wiring to sensor
3Corroded connector
4Timing chain jumped
5ECU issue

Typical Repair Cost

$40 - $5,000

Based on 28 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.

Diagnostic Tools

To diagnose P0340, you'll need an OBD-II scanner. Here are our recommendations at every price point.

Budget Pick$10–$20

ANCEL AD310 Classic OBD-II Scanner

by ANCEL

A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).

  • Read & clear engine codes
  • View freeze frame data
  • I/M readiness status
  • No batteries or app needed
Check Price on Amazon
Best Value$90–$120

BlueDriver Pro Bluetooth Scanner

by BlueDriver

Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.

  • Enhanced diagnostics (ABS, SRS, transmission)
  • Repair Reports with verified fixes
  • Smog check readiness
  • Free app (iOS & Android)
Check Price on Amazon
Advanced$180–$230

LAUNCH CRP123X OBD-II Scanner

by LAUNCH

A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.

  • Engine, transmission, ABS, SRS diagnostics
  • Live data stream & graphing
  • AutoVIN for vehicle identification
  • Free lifetime updates via Wi-Fi
Check Price on Amazon
Professional$350–$450

Autel MaxiCOM MK808S Diagnostic Tool

by Autel

Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.

  • All-system diagnostics (25+ modules)
  • Bi-directional control & active tests
  • Oil reset, EPB, BMS, TPMS, injector coding
  • 7-inch touchscreen with Android OS
Check Price on Amazon

As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.

Vehicles Affected (26)

MDXMinor

Timing Belt Tensioner and Water Pump Failure

2001-2006$800-$1,5001,900 reports
FleetwoodCritical

LT1 5.7L Optispark Distributor Failure (1994-1996)

1994-1996$400-$1,0000 reports
RangerModerate

Camshaft Synchronizer Chirp and Oil Pump Drive Failure on 3.0L/4.0L V6

2000-2011$250-$9000 reports
ExplorerCritical

Timing Chain Cassette and Guide Failure on 4.0L SOHC V6

2000-2010$1,800-$4,5000 reports
RangerCritical

Timing Chain Guide and Cassette Failure on 4.0L SOHC V6

2001-2011$1,800-$4,0000 reports
EnvoyCritical

4.2L I6 Crankshaft Position Sensor Failure and Stalling

2002-2009$80-$300540 reports
Del SolCritical

Distributor Failure (Ignition Issues)

1993-1997$150-$5000 reports
PassportCritical

Idle Stop (Auto Start-Stop) Stalling and Failure to Restart

2019-2023$40-$3000 reports
ElantraModerate

Crankshaft Position Sensor Failure Causing Stalling

2011-2017$150-$400456 reports
FX45Critical

Timing Chain Guide Wear and Chain Noise

2003-2008$1,800-$3,5000 reports
FX35Moderate

Camshaft / Crankshaft Position Sensor Failure

2003-2012$150-$4500 reports
FX45Moderate

Camshaft and Crankshaft Position Sensor Failure

2003-2008$180-$5000 reports
M35Moderate

Camshaft and Crankshaft Position Sensor Failure

2006-2010$180-$4500 reports
M37Moderate

Camshaft / Crankshaft Position Sensor Failure

2011-2013$180-$4500 reports
M56Critical

Timing Chain Guide Wear / Chain Noise

2011-2013$2,500-$5,0000 reports
QX50Critical

Timing Chain / VVEL Rattle and Front Timing Cover Oil Leaks on VQ37VHR

2014-2018$900-$2,8000 reports
WranglerCritical

OPDA/Camshaft Synchronizer Failure Causing Squeal and Cam Gear Wear

2005-2006$350-$2,5000 reports
RioCritical

Timing Belt Neglect Leading to Bent Valves and Sudden No-Start on 1.6L Engines

2001-2005$500-$2,5000 reports
CubeCritical

Intermittent Engine Stalling While Driving

2009-2014$150-$700180 reports
AltimaModerate

Crankshaft and Camshaft Position Sensor Failures Causing Stalling or No-Start

2002-2012$150-$6000 reports
PathfinderCritical

VQ35DE Timing Chain Stretch and Guide Wear

2013-2016$2,000-$4,0000 reports
FrontierModerate

Distributor / Ignition System Failure Causing Sudden Stall or No-Start

2000-2004$250-$7000 reports
SentraModerate

Crankshaft and Camshaft Position Sensor Failure Causing Intermittent Stall or No-Start

2002-2006$150-$4500 reports
300ZXCritical

CAS (Crank Angle Sensor) Failure

1990-1996$150-$6000 reports
MokkaMinor

Mokka A 1.7 CDTI Water Pump / Timing Belt Drive

2012-2019$700-$3,0000 reports
VueMinor

Vue 3.5L Honda V6 Timing Belt Service Interval

2004-2007$600-$1,5000 reports
850Moderate

Distributor Cap and Rotor Failure

1993-1997$50-$2000 reports
V40Critical

Timing Belt Failure Risk

2000-2004$400-$3,0000 reports

Related Codes (8)

P0341Camshaft Position Sensor Circuit Range/Performance (Bank 1)P0345Camshaft Position Sensor Circuit Malfunction (Bank 2)002FManufacturer-Specific Diagnostic Code16566Mass Air Flow Sensor Signal Too Low (VAG)ECM-940AEngine Control Module Fault (Volvo)P0008Engine Position System Performance - Bank 1P0009Engine Position System Performance - Bank 2P0010Intake Camshaft Position Actuator Circuit (Bank 1)

FAQ

What does P0340 mean?

P0340 stands for "Camshaft Position Sensor Circuit Malfunction." The camshaft position sensor is not sending a valid signal to the ECU. Can cause rough running, misfires, or no-start.

What are the most common causes of P0340?

The most common causes of P0340 are: Failed camshaft position sensor, Damaged wiring to sensor, Corroded connector, Timing chain jumped, ECU issue. The specific cause varies by vehicle.

How much does it cost to fix P0340?

Repair costs for P0340 range from $40 to $5,000, depending on the vehicle and root cause.

Which vehicles are affected by P0340?

Au7o has documented P0340 across 26 vehicle models from 13 manufacturers: Acura, Cadillac, Ford, GMC, Honda, Hyundai, Infiniti, Jeep, Kia, Nissan, Opel, Saturn, Volvo.

Sources (12)

  • ForumMDXers.org: Timing belt tensioner failure (P0300, P0301, P0302, P0303)
  • ForumMDXers.org: DIY 01-06 Acura MDX Timing belt & waterpump Replacement tutorial
  • mediaHow To Test The CKP Sensor 4.2L TrailBlazer Envoy
  • media2002 GMC Envoy Crankshaft Position Sensor Problems - CarProblemZoo
  • Forumcrankshaft sensor replacement - Trailvoy
  • videoEricTheCarGuy - Volvo V40 Timing Belt Replacement Guide
  • ForumCarComplaints - Kia Rio Timing Belt Problems
  • ForumKia-Forums discussions on Rio timing belt failure and bent valves
  • TSBChrysler TSB 09-003-05 regarding 2005 Wrangler 4.0L OPDA/cam sensor assembly concerns
  • ForumWranglerForum and JeepForum owner threads documenting 2005-2006 OPDA 'screaming monkey' failures
  • ForumNICOclub / Frontier-Xterra community discussions on distributor failure causing stall/no-start
  • ForumThe Ranger Station forum discussions on cam synchronizer chirp and replacement

Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.

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