Last reported case: 9 years ago
Based on 4 owner reports, 4 from forums)
What is P0340?
P0340 indicates a problem with the camshaft position sensor circuit, which is critical for engine timing and fuel injection. This is a high-severity powertrain code that can cause drivability issues or prevent the engine from starting. Based on real owner reports, this code appears frequently in Ford Mustangs, Jeep Libertys, and Nissan Maximas.
Common Causes:
- Faulty camshaft position sensor (most common replacement part)
- Wiring issues or poor electrical connections in the sensor circuit
- Timing chain or belt problems affecting sensor alignment
- Failed engine control module (ECM) or sensor power supply issues
Symptoms:
- Check Engine Light is illuminated
- Engine cranks but won't start
- Rough idling or engine misfires
- Reduced engine power or hesitation during acceleration
- Poor fuel economy
🚗P0340 on 2020 FORD Mustang
This page focuses specifically on P0340 issues reported by 2020 FORD Mustang owners. The experiences and fixes below are from real owners of this exact vehicle.
Parts Often Involved:
What Owners Say
Real experiences from 2020 FORD Mustang owners
“After some research I saw the tsb about the alternator, picked up a new one and the fixed the p0344 code but still have the p0340 and cannot get it to go away.”View original
“BTW, I got a rebuilt unit here locally that has lasted longer than either of the two Ford alternators that went bad on me before that. I paid $270 total, and that included a new 8-rib pulley too.”View original
“2 DTC P0340 and P0344 P0340 Camshaft Position Sensor "A" Circuit P0344 Camshaft Position Sensor "A" Circuit Intermittent Ok, So I got both these codes..last year I got the p0340 in the summer when it was hot and most felt it was the alternator.”View original
“If it's not your alternator, you would be the first person I know of that got the P0340/P0344 for some other reason. Just replace the alternator before you get stuck somewhere and have to add a tow truck bill to the cost, too.”View original
“Ok guys I have searched and searched for any answer to this problem and I can find any answers, car is an 05 gt and mods are as follows: jlt series 3 intake, bbk twin 62mm throttle body, frpp shorty headers, and cat less x.”View original
“P0340 Camshaft Position Sensor "A" Circuit P0344 Camshaft Position Sensor "A" Circuit Intermittent Ok, So I got both these codes..last year I got the p0340 in the summer when it was hot and most felt it was the alternator.”View original
These are real experiences shared by 2020 FORD Mustang owners on automotive forums and communities. Results may vary based on vehicle condition and repair quality.
About This Data
This page aggregates 4 discussions about P0340 from 2020 FORD Mustang owners across automotive communities.
Success rate (25%) is calculated from posts where owners confirmed whether their fix resolved the issue.
Last updated: 6/18/2016