Why does my Toyota Echo stall or not start sometimes?

Short answer: Intermittent stalls and no-starts on an Echo are usually electrical: a loose or corroded connection, a relay, a dirty mass airflow (MAF) sensor, or power problems to the engine computer. If a code reader can't even talk to the car, the computer may not be getting power, so check fuses, relays and grounds before replacing it. If the key itself won't turn to the start position, the ignition lock or switch is worn and can usually be replaced.

Symptom: While driving you hear a click and everything shuts down for a second, then comes back. Or it sometimes won't start at all, sometimes with the check engine light on. Some owners find the key won't turn to Start without many tries.

What to check first

1. On a 2001–2002 Echo, check your VIN for recall 06V266000 at nhtsa.gov/recalls. It replaces a crankshaft position sensor whose connector can let in oil and come loose, which can stall the engine.
2. Have the codes read at a parts store. If the reader can't communicate with the car, check power and ground to the engine computer and the diagnostic connector.
3. Check battery terminals, main grounds and fuses/relays for corrosion or looseness.
4. Clean the MAF sensor with MAF cleaner only, and make sure its connector clicks fully back in.
5. Check whether the radiator fan ever comes on. One owner noticed it had stopped, which can point to a relay or wiring problem.
6. If the key won't turn, have a locksmith or shop replace the ignition lock cylinder or switch.

Likely causes

1. Loose or corroded connection, ground or relay. A member's first suggestion for a click-and-shut-off stall.
2. No power to the engine computer. If a scan tool can't connect, the ECU may not be getting power; one owner's replaced ECU didn't fix it.
3. Dirty mass airflow sensor. Cleaning it helped one owner; a loose connector afterward caused codes P0100 and P0110.
4. Worn ignition lock or switch. Key won't turn to start without many tries.

What it usually costs

One owner bought a new engine computer on two mechanics' advice, and the problem came back a week later. No other costs were posted.

Is it safe to keep driving?

A car that shuts off while driving is dangerous on bridges, in tunnels and in traffic. Get it diagnosed before relying on it. Verify with a mechanic.

DIY or shop?

DIY for reading codes, cleaning terminals and the MAF sensor, and checking fuses. Tracing an intermittent wiring fault or replacing an ignition switch is usually easier for a shop.

Recalls, bulletins and complaints in plain words

• Related recalls: NHTSA lists these recalls touching this area of the Toyota Echo: 06V266000 (2001-2002 model years, engine and engine cooling). Check your VIN at nhtsa.gov/recalls. If your car is part of this recall, the dealer fixes it for free.
• What that recall means: On some 2001–2002 Echos, engine oil can seep into the crankshaft position sensor's connector (the sensor tells the computer where the engine is in its rotation). The connector can then deform and come loose, and the engine can stall while driving and not restart. The fix is a new sensor. If your car is part of this recall, the dealer fixes it for free.
• NHTSA complaints: 20 keyword-matched complaints for Toyota Echo 2000–2005 (of 237 unique complaints queried, NHTSA complaints API by model year, queried 2026-10-24; keywords: won't start, won't crank, no start, click, starter, ignition switch, stall, shut off, dies). This counts complaints that mention these words. It is not a defect finding.

What owners report

• In Toyota Echo Intermittent Stalling on Car Talk, a 2000 Echo at about 140,000 miles would click and shut off for a second while driving, then recover, about a dozen times in three months. A member suggested a bad relay or loose connection, and another noticed the radiator fan wasn't coming on. The owner cleaned the MAF sensor, got P0100 and P0110 codes because he hadn't reseated the connector, fixed that and hoped the cleaning solved it.
• In 2004 Toyota Echo intermittent no start on Car Talk, a manual 2004 had a constant check engine light and intermittent no-starts. Two mechanics replaced the ECU, and it worked for a week before the problem returned. Members said a code reader that can't communicate means power to the ECU or the diagnostic connector is the likely issue, and that the ECU was probably replaced needlessly.
• In 2000 Toyota ECHO ignition switch on Car Talk, a 2000 Echo at 169,000 miles needed many tries before the key would turn to start, and one mechanic said it couldn't be fixed. A member suggested calling a Toyota dealer and parts suppliers for the ignition switch and having a shop install it.

Quick tip

Most of these problems are electrical and fixable. Don't let anyone sell you a computer until they've proven it's getting power and ground.

Vehicle focus: 2000–2005 Toyota Echo with the 1.5L four-cylinder.

Safety / mechanic note

Stalling while driving can leave you stranded in traffic or tunnels. Verify with a mechanic.