P0379
Stop drivingThe engine computer is not receiving a high-resolution signal from a critical engine timing sensor, meaning it can't accurately track engine position.
Code P0379 means the engine computer isn't getting a timing signal. Common causes: Crankshaft Position Sensor (50%), Camshaft Position Sensor (30%), wiring (15%). Drivability: No, stop driving. Repair cost: $30-$150 DIY, $150-$450 professional.
Can I Drive With P0379?
No, stop driving
Immediate repair needed
Stop driving immediately if: Engine cranks but won't start, engine stalls, severe misfires, significant power loss.
Symptoms of P0379
- 1Engine cranks but won't start
- 2Engine stalls unexpectedly
- 3Engine runs very rough or misfires severely
- 4Significant loss of engine power
- 5Check Engine Light is on or flashing
Common Causes of P0379
Parts most likely causing this code, ranked by probability
A faulty crankshaft position sensor fails to send the necessary timing pulses to the engine computer, preventing proper engine operation.
50% of P0379 cases are fixed by replacing the crankshaft position sensor
A malfunctioning camshaft position sensor cannot provide the engine computer with the required timing pulses, leading to starting or running issues.
30% of P0379 cases are fixed by replacing the camshaft position sensor
Damaged, corroded, or loose wiring and connectors to the crankshaft or camshaft position sensors interrupt the signal to the engine computer.
15% of P0379 cases are fixed by repairing wiring or connectors
A rare internal fault within the engine computer can prevent it from properly receiving or interpreting the timing signals.
5% of P0379 cases are fixed by replacing or reprogramming the ECM/PCM
Check These First (Before Buying Parts)
- Inspect the wiring harness leading to both the crankshaft and camshaft position sensors for any visible damage, chafing, or signs of rodent activity.
- Check the electrical connectors at both sensors for corrosion, bent pins, or a loose fit. Disconnect, inspect, clean with electrical contact cleaner, and reconnect.
How to Diagnose P0379
- 1Visually inspect the wiring and connectors for the crankshaft and camshaft position sensors for any damage, corrosion, or looseness.
- 2Check for proper voltage supply to both the crankshaft and camshaft position sensors using a multimeter.
- 3Test the output signal of the crankshaft and camshaft position sensors using a multimeter or oscilloscope while cranking the engine.
- 4If sensors and wiring check out, inspect the reluctor wheels (tone rings) for damage or misalignment, if accessible.
- 5If all else fails, consider professional diagnosis for potential ECM/PCM issues, though this is very uncommon.
P0379 on Popular Vehicles
Toyota Camry
2007-2024Crankshaft position sensors on these models are generally accessible, often located on the front or side of the engine block near the crankshaft pulley. Camshaft sensors are usually on the cylinder head. Wiring integrity is key.
80% fixed by replacing a position sensor
Honda Accord
2003-2024Honda Accords are known for occasional crankshaft and camshaft sensor failures. The crankshaft sensor can sometimes be tricky to reach, requiring removal of the drive belt and possibly the crankshaft pulley on some engines. Always check for oil leaks that might contaminate sensors or wiring.
75% fixed by replacing a position sensor or repairing wiring
Ford F-150
2004-2024On Ford F-150s, especially with V8 engines, the crankshaft position sensor is typically on the passenger side of the engine block, often above the oil pan. Camshaft sensors are on the cylinder heads. Corrosion in connectors, particularly in areas exposed to road spray, can be a factor.
80% fixed by replacing a position sensor or repairing wiring
Frequently Asked Questions
What does P0379 mean?
P0379 indicates that your vehicle's engine computer (PCM) is not receiving the expected high-resolution timing reference pulses from a critical engine position sensor, such as the crankshaft or camshaft position sensor. This signal is essential for the engine to know its exact position and timing.
Can I drive with P0379?
No, stop driving. This code means your engine is either not running at all, or it's running so poorly that driving it risks severe engine damage or leaves you stranded. Immediate repair is necessary.
Will P0379 clear itself?
No, P0379 will not clear itself. This code points to a critical sensor failure or wiring issue that prevents the engine from operating correctly. The underlying problem must be fixed, and the code will then need to be cleared with an OBD-II scanner.
How do I fix P0379 myself?
Start by inspecting the wiring and connectors for the crankshaft and camshaft position sensors. If they look good, test the sensors themselves with a multimeter. Most often, replacing a faulty crankshaft or camshaft position sensor will resolve the issue.
How much does it cost to fix P0379?
DIY repair costs for P0379 are typically $30-$150 for a new crankshaft or camshaft position sensor. Professional repair at a shop will cost $150-$450, which includes parts and 1-3 hours of labor.
P0379 keeps coming back - why?
If P0379 keeps returning, it indicates the initial repair didn't address the root cause. This could be due to a faulty new sensor, overlooked wiring damage, a problem with the reluctor wheel (tone ring) the sensor reads, or, in rare cases, an issue with the engine computer itself.
Will P0379 fail emissions/smog test?
Yes, P0379 will cause your vehicle to fail an emissions or smog test. The Check Engine Light will be on, and the engine's critical timing system is compromised, preventing it from meeting emissions standards.
What's the difference between P0379 and P0335?
P0379 specifically means 'Timing Reference High Resolution Signal 'A' No Pulses,' indicating a complete lack of the high-resolution timing signal. P0335 means 'Crankshaft Position Sensor 'A' Circuit Malfunction,' which is a more general fault with the crankshaft sensor circuit that could be no signal, an intermittent signal, or an incorrect signal.
P0379 on Honda Accord
On many Honda Accord models, the crankshaft position sensor is located near the crankshaft pulley, and the camshaft position sensor is typically on the cylinder head. Access can vary, but often requires removing some accessory belts or components. Wiring issues are also common on older Hondas.
Questions to Ask Your Mechanic
Did you check the voltage supply and signal output of both the crankshaft and camshaft position sensors?
Good answer: Yes, I used a multimeter to confirm proper voltage to both sensors and an oscilloscope to verify the signal output while cranking. The crankshaft sensor showed no signal.
What did you find when inspecting the wiring and connectors for these sensors?
Good answer: I found some corrosion in the crankshaft position sensor connector, which I cleaned, but the sensor itself was still faulty. Or, I found a frayed wire near the camshaft sensor that was causing an open circuit.
Repair Cost Estimate
DIY Repair
Parts only
$30-$150
Shop Repair
Parts + labor
$150-$450
Save $120-$300 by doing it yourself
Difficulty
intermediate
Time
1-3 hours
Intermediate - requires basic electrical diagnostic skills with a multimeter and the ability to locate and replace engine sensors, which can sometimes be in tight spots.
Cost of Waiting
Ignoring P0379 means your engine will not start or will stall, leaving you stranded. Continued attempts to start a non-running engine can drain your battery or potentially damage the starter motor. A $30-$150 sensor replacement now prevents a tow bill and further frustration.
While You're In There...
Cleaning electrical connectors for the sensors and other nearby components ensures good conductivity and prevents future intermittent issues.
Tools You'll Need
- OBD-II scanner
- Multimeter
- Basic hand tools (sockets, wrenches)
- Wire brush or electrical contact cleaner (for connectors)
- Test light (optional)
- Oscilloscope (for advanced diagnosis, optional)
P0379 is a critical code, but it often points to a straightforward sensor replacement. Once fixed, your engine will regain its proper timing and run smoothly again.
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Your Next Steps
Step 1: Visually inspect the wiring and connectors for both the crankshaft and camshaft position sensors. Look for any cuts, frays, or corrosion. Clean any dirty connectors.
Step 2: If the wiring looks good, use a multimeter to test for proper voltage supply to the sensors and to check the sensor's output signal while cranking. A lack of signal points to a bad sensor.
Step 3: Parts you'll likely need: A new crankshaft position sensor or camshaft position sensor, depending on your diagnosis. You may also need electrical tape or heat shrink for any wiring repairs.