2000 Jeep Cherokee. Codes P0700+P1694+P0740+O2 sensor

Hello y'all. New here and wanting to see if any of you know what's up

About a month ago. i had some stalling/no pedal response. It happend for one day and never came back. No CEL

Then two weeks ago it happend again. Decided to replace TPS(Mopar) and CPS(NAPA), cleaned throttle body. The issue still happened

Went to Advanced to scan codes. Received a P0740. I went to AAMCO the next day. They said it was not Transmisson related. They didn't get a P0740 after some tests or whatever. They did get a P1698. Jeep drove fine

Took Jeep to another shop for testing. They cleared code P1698 and Jeep drove fine on their test drive. After that I went to go scan again and only the O2 code came about.Later that day the problem arose again. Thats after I reset the ECM.

Flash forward to today. The Jeep drove fine to the JY. Was able to use cruise control
Jeep drove fine to a persons house so we could do some more testing. After trying different TCM/Gauge cluster I then decided to place back old TCM in. In that process the fuel pump fuse blew. Replace that and Jeep turned on. Did reset ECM again before finding out fuse blown Drove to Advance again to scan codes. That's where I got the title codes. P0700, P0740, P1694 and the O2 codes. On the drive back to the house no stalling.

So right now I am lost and don't want to cause more issues. What is going on? Is there a part? Wire? Etc to replace?

Use the Check Engine Light trouble codes to guide your diagnostics. The P0700 series codes can be ignored at this point, they are likely just caused by whatever is the primary malfunction.

Any CPS that is not a genuine Jeep part is suspect.


If you have both a P1694 and P1698 suspect a faulty Crankshaft Position Sensor (CPS). The CPS must be tested before you proceed. In the past there have been reports that the TCM has caused similar fault(s). Try unplugging the TCM and see if the NoBus message ( if present ) goes away and all gauges work. If so, replace the TCM.

Inspect and test the CPS wire plug and wire harness for loose/bent/damaged connection pins, corrosion, and damaged wires. Inspect, clean, and tighten firmly the two ground wires at the ignition coil. They also are ground locations for the transmission computer.

P1694 Fault In Companion Module. No CCD/J1850 bus messages received at the power train control module (PCM) from the AisinWarner Transmission Control Module (TCM). P1694 will set if no CCd bus messages are received from PCM for 20 seconds or invalid messages are received for 20 seconds.

Possible Causes
- Faulty Crankshaft Position Sensor.
- Faulty TCM.
- CCD Bus (-) circuit open between PCM and TCM.
- CCD Bus (+) circuit open between PCM and TCM.
- Transmission CCD bus wiring damaged
- CCD Bus (-) circuit open between PCM and TCM.

In the past there have been reports that the Transmission Control Module (TCM) failures and Keyless Entry (RKE) module failures have caused similar symptoms and faults. Note that the RKE module is on the CCD Bus. Try unplugging the RKE module and try unplugging the TCM and see if the NoBus message goes away and all gauges work. If so, replace the TCM or RKE. Engine sensor wire harness/wire plug issues, a faulty CPS, or a faulty TCM should be the first suspects for a P1694.

Read this >> http://www.naxja.org/forum/showthread.php?t=63167

P1698 No CCD Messages Received From PCM. Bus communication failure to PCM. A "Companion DTC" was set in both the ECM and PCM.

Possible Causes:
- CCD Bus (-) circuit open between PCM and TCM.
- CCD Bus (+) circuit open between PCM and TCM.
- Engine control module (ECM) harness is open or shorted.
- Engine control module (ECM) circuit poor electrical connection.
- Failed engine control module (ECM).

Read this >> https://www.jeepforum.com/forum/f11/...odule-1359085/

When the CPS short circuits the engine computer (PCM) shuts down to prevent damage to itself. As a result, there is no communication (P1694).

Disconnect your crankshaft position sensor then put the ignition key in the on position. If the instrument cluster voltage and fuel gauges start to work once the CPS is disconnected, then you know the CPS or CPS wires are shorted and is the root cause of the codes. You can verify this by testing the CPS and checking continuity and voltage on the CPS wires.

P1694 Diagnostic Procedure
1. Check instrument cluster gauges for proper operation. If fuel gauge and speedometer operate properly, go to next step. If fuel gauge and voltage meter do not operate properly, test the CPS.
2. Turn ignition off. Disconnect Gray PCM harness connector. PCM is located at left front of engine compartment. Disconnect TCM harness connector. Measure resistance of CCD BUS (-) circuit (White/Black wire) between TCM harness connector and Gray PCM harness connector. If resistance is more than 5 ohms, repair open in CCd BUS (-) circuit (White/Black wire). If resistance is 5 ohms or less, go to next step.
4. Measure resistance of CCD BUS (+) circuit (Violet/Brown wire) between TCM harness connector and Gray PCM harness connector. If resistance is more than 5 ohms, repair open in CCd BUS (+) circuit (Violet/Brown wire). If resistance is 5 ohms or less, replace TCM.
5. Conditions necessary to set DTC P1694 are currently not present. Inspect related wiring and harness connectors. See WIRING DIAGRAMS. Repair wiring as necessary. If no problem is found, check for broken, bent, backed-out or corroded wire terminal pins. Check for chafed, pierced or partially broken wires inside insulation. Repair as necessary.

With testing the CPS and TCM through scaning. Do I have the Jeep in turned on mode or working gauges mode?

I did clean the 2 grounds on the block, by the A/C compressor. Are those the 2 grounds you are referring to?

Shaller13 said:

With testing the CPS and TCM through scaning. Do I have the Jeep in turned on mode or working gauges mode?

Click to expand...

I test all the OBD sensors with a volts/ohms multi-meter, ignition switch to the ON / RUN position, engine not running



1997 -1999 G101 is located at the two coil mounting studs on the engine block and is the primary ground for the PCM, TCM and O2 sensors.

2000-01 G101 is located on the same two engine block studs located between the alternator and the Camshaft Position Sensor assembly, and is the primary ground for the PCM, TCM and O2 sensors.

Additional ground point are adjacent to the PCM, the battery, and at the dipstick to engine block bolt.

Tim_MN said:

G101 is located at the coil and is the primary ground for the PCM, TCM and O2 sensors.

Additional ground point are adjacent to the PCM, the battery, and at the dipstick to engine block bolt.

Click to expand...

That's not the case on a 2000 with the coil rail!

Despite not having a coil bolted there, the 2000-01 G101 ground is still located on the same two engine block studs for coil mounting located between the alternator and the Camshaft Position Sensor assembly.

Tim_MN said:

Despite not having a coil, the 2000-01 G101 ground is still located on the same two engine block studs for coil mounting located between the alternator and the Camshaft Position Sensor assembly.

Click to expand...

Your position is correct but the coils are grounded thru 3 separate grounds to the PCM!

G101 is the primary ground for the PCM, TCM and O2 sensors and related to the current CEL trouble codes. The OP would be wise to clean and snug the other previously mentioned grounds adjacent to the PCM, the battery, and at the dipstick to engine block bolt no matter which ignition system is present.

Afternoon everyone.

To reply to the cleaning grounds. I have done that already. Cleaned the 2 studded grounds couple of days ago. I cleaned another ground yesterday in that same area close to the other 2 grounds

I went to Oreillys this morning to scan to see what codes appeared.

P0132 bank one sensor one O2
P0740 TCC solenoid circuit
P1698 no engine Bus messages
I cleared the codes

Went on a drive and CEL came on. Scanned and only the P0132 O2 code showed. Did not clear that

I went on another drive this time doing hwy speeds. I stopped one more time and scanned. Once again only the O2 P0132 code was present. While I was driving in town my no pedal response/stalling issue was present. I went back onto the hwy and no issues

Have not checked codes since.

https://www.cherokeeforum.com/f2/no-throttle-response-backfiring-98-4-0l-186955/
This post suggests replaceing the O2 fixed his problem

At this point, my O2 is getting replaced in a few weeks

Other possible solutions: drain/refill Tranny fluid a couple of times to get 100% fresh fluid in
Drop Transmisson pan and new gasket and clean/replace Transmisson filter
Last case is replace transmission solenoids

Outside of those ideas, I don't have any clues.

The Check Engine Light trouble codes are used to guide and focus your diagnostics and testing.

UPDATE: It was the O2 sensor that caused the issues

Shaller13 said:

UPDATE: It was the O2 sensor that caused the issues

Click to expand...

did you replace the upstream and downstream at the same time? If not, which one did the trick?