OBD-II Code P0322 — What It Means & How to Fix It

What Does This Error Mean?

P0322 means the ECM is receiving no signal at all from the ignition distributor engine speed circuit. With no engine speed signal, the ECM has no way to time the spark or fuel injection correctly. This typically causes the engine to stall, refuse to start, or run extremely rough. This is a more serious version of P0321 — it's a complete signal loss, not just an out-of-range signal. On distributor-equipped vehicles, this often means the pickup coil or distributor has failed.

Affected Models

Vehicles with distributor-based ignition systems
Common in older Honda Civic and Accord
Common in older Toyota Camry and Corolla
Common in older Mazda vehicles
Common in older Ford and GM vehicles with distributor ignition

Common Causes

Failed ignition pickup coil inside the distributor — coil has an open circuit and produces no signal
Broken or disconnected wiring between the distributor and the ECM
Distributor cap so badly damaged that the rotor can't generate any signal
Complete distributor failure — shaft seized or internal components broken
ECM input circuit failure — the ECM itself can no longer read the distributor signal

How to Fix It

Confirm the code with an OBD-II scanner. If the vehicle won't start, use a scanner that can read codes with the key in the ON position without the engine running. Note all codes — additional codes alongside P0322 can point to the cause.

If you also have P0320 and P0321 together, the distributor signal circuit has completely failed.
Check for power at the distributor connector. With the ignition ON (engine not running), use a multimeter to verify the distributor is receiving its reference voltage. No voltage means the power supply wire or its fuse has failed.

Check the ignition fuse in the fuse box — a blown fuse can cut power to the entire distributor.
Remove the distributor cap and inspect the pickup coil assembly. Look for physical damage, broken wires at the coil terminals, or cracked housing. Test the pickup coil resistance according to your vehicle's service manual specs. An open reading (OL) means the coil has failed.

Pickup coil replacement often requires partial distributor disassembly — a service manual is very helpful here.
Inspect the wiring harness from the distributor to the ECM. Check each wire for continuity using a multimeter. A single broken wire in the signal circuit will cause a complete no-signal condition and set P0322.

Look especially near the distributor base and at any flex points in the harness where wires are more likely to break.
If the pickup coil and wiring both test good but there is still no signal, the distributor may need to be replaced as a unit. Worn or seized internal components can prevent the sensor from generating any output. Have a mechanic confirm with an oscilloscope before purchasing a replacement.

A remanufactured distributor is often more cost-effective than a new OEM unit — quality varies, so buy from a reputable brand.

When to Call a Professional

If the vehicle won't start or immediately stalls and you've confirmed a no-signal condition on the distributor circuit, this is a situation that needs a mechanic promptly. An oscilloscope test can confirm within minutes whether the distributor is generating any signal at all. Don't keep cranking a no-start vehicle — excessive cranking can damage the starter. Expect $150-$400 for a distributor replacement including labor.

Frequently Asked Questions

Will my car start with P0322?

Probably not — or it will start very briefly and immediately stall. The ECM needs the engine speed signal to control ignition timing and fuel injection. With zero signal from the distributor, the ECM is essentially flying blind. It cannot deliver the right spark at the right time, so the engine won't run. This is one of the few codes that can leave you completely stranded.

Can I replace just the pickup coil, or do I need a whole distributor?

On many vehicles, the pickup coil can be replaced separately — it sits inside the distributor and is held by two screws. This is significantly cheaper than replacing the whole distributor. However, if the distributor shaft is worn or the housing is cracked, a complete replacement makes more sense. Check part availability for your specific vehicle before deciding.

How much does it cost to fix P0322?

A pickup coil replacement typically costs $30-$80 for the part plus $50-$100 for labor. A complete distributor replacement runs $100-$300 for a remanufactured unit plus $100-$150 for installation. Wiring repairs are typically $50-$200 depending on what is damaged. If the ECM input circuit has failed, ECM repair or replacement can run $300-$1,000+.